Thank you very much for posting this video. I've asked several repair shops how a pump works; even going as far as offering cash and none explained this as well as you just did. Thank you thank you thank you. I will be more confident on my next repair.
@instructordave111
9 жыл бұрын
Mark Ervin Happy that you got some value from this video.
@michaelnelson9140
3 жыл бұрын
I will teach you! How much? ☺️
@jdillon8360
3 жыл бұрын
Brilliant video and explanation. Thanks for sharing. I'm trained on Bosch, Delphi and Denso, and these Stanadyne pumps have always been a bit of a mystery for me. This video helped me a lot. Cheers.
@instructordave111
3 жыл бұрын
Happy that it still helps after all these years.
@tysondeal4369
8 жыл бұрын
instructordave111 Thank you very much for the video. I recently tore down a DB, not DB2, which appears to be the same internally other than the distributor portion. I read the service manual's description of operation thoroughly, but your video made it all come together. I appreciate you taking the time to make this.
@paramaniacwolverine843
7 жыл бұрын
I am glad I came across this video. I have a gm 350DX and the pump was a bit of a mystery.
@allisonlebel8534
7 жыл бұрын
Happy that it can still be of use to you.
@michaelkaybecker
6 жыл бұрын
It’s 2018 and I’m in my journeyman year of school, thanks for the great video.
@instructordave111
6 жыл бұрын
MKB Rockets great that my old video still has some value.
@toctuning
4 жыл бұрын
Wonderful breakdown of the Stanadyne system! I learned a ton watching this. I entered diesels not long ago, after 20 total years as an auto mechanic, 15 of those 20 spent with motorcycles, and now 2 years into diesel, learning and experimenting as much as I can. Currently, servicing my '91 6.2 Detroit has been a wonderful experience in learning how the deeper mechanical parts of diesels work, as well as how to understand the complex systems in play when they are running correctly.
@gregbailey3710
Жыл бұрын
Thanks for breaking that down for me. I believe you just solved my problem.
@9102jack
9 жыл бұрын
I can imagine that it took some time to machine all the injection pump parts to expose the many passageways.. Excellent work. I've always wondered how these little rotary monsters did their work, and now have a better understanding of what controls my old 6.2 GM Detroit. I have recently acquired a late 90s 6.5L Turbo Detroit, with the PCM controlled Stanadyne DS4 electronic injection pump. If there are videos of this nature describing their inner workings I'd greatly appreciate viewing them!
@instructordave111
9 жыл бұрын
I don't know of any cutaway type videos of the DS4 pump, but the ecm would be controlling the metering, governor and timing of the pump rather than being mechanical components. The guy that did this video may be a resource for you. kzitem.info/news/bejne/0o13wJx7hl90fpw Good Luck.
@johngnipper8768
Жыл бұрын
They were not Detroit diesels . It’s a common misconception
@craigtull2361
11 ай бұрын
In the automotive world they are considered Detroits starting with the 5.7 series, no it is not technically correct but it is an accepted term, it separates the miserable GM designed engines from the Isuzu designed GM engines. @@johngnipper8768
@DavidHernandez-kt5oo
Жыл бұрын
You provided some excellent help with your demonstration of the processes involved. Thank you.
@instructordave111
Жыл бұрын
Thank you, happy to be of help .
@Definitely_Dave
Жыл бұрын
A US military Mechanic school instructor recommended this video to me.
@instructordave111
Жыл бұрын
I hope that it was of some use to you. Glad that my old video is still working for people out there. Have a great day.
@Scratcher1960
10 жыл бұрын
This is just great. Thanks Dave
@manicmechanichummers
2 жыл бұрын
VERY well taught. Thank you Sir.
@joeholland428
2 жыл бұрын
Great video you should watch if you are tearing apart a stanadyne pump.
@maniekmechanik
5 жыл бұрын
Thanks for very helpful video 👍🖐
@fastrace011
10 жыл бұрын
Great video. I have a 1981 Oldsmobile 98 Diesel and it has an injection pump that looks just like the one in this video. More Injection pump videos please. Thanks
@transmitterguy478
4 ай бұрын
Fantastic! Thanks.
@tanyaerskine7657
4 жыл бұрын
What an excellent explanation. Thank you so much. I've been sitting here with a cup of coffee just scribbling notes and understanding everything. I love it when I find someone who clicks with how I learn. This video is very appreciated and I'll be referring classmates to this for help. Still good in 2020!
@instructordave111
4 жыл бұрын
Thank you for the kind words Tanya. I am happy that this is still helping people understand how this pump works.
@radford4528
5 жыл бұрын
Great videos, using in alberta canada
@instructordave111
5 жыл бұрын
I am happy that you are getting some use out of this old video. Good luck.
@rodneyarmstrong5118
Жыл бұрын
Thank you for the iñteresting information,and keep up the good work.
@VinnyMartello
3 жыл бұрын
This is an awesome video. I never knew how an injector pump worked.
@instructordave111
3 жыл бұрын
Happy that I could help.
@deanfrancois7238
Жыл бұрын
Great Video, very informative.
@MW-gb7fe
8 жыл бұрын
I have a tractor that will start fine but idles high and I have no throttle response. Any ideas its a 4 banger with a cav pump
@instructordave111
8 жыл бұрын
You may have an issue with the control on the metering valve or a governor linkage issue. the CAV pumps work a bit differently than the Roosa Master design in this video. I don't have a CAV video to reference on this.
@24327936
4 жыл бұрын
So good explanation Sir. Please explain to us the VE type if can
@oaktreejw
2 жыл бұрын
Thank you so much for this video! Your detailed explanation especially the part about the return being blocked lead me to disconnect the return to tank and connecting a catch container, this got the truck running again! I would have never imagined a blocked return could stop the engine from running otherwise. Now to find why the return is restricted and correct that issue. I’m thinking an issue with the tank selector valve since the truck has dual fuel tanks.
@instructordave111
2 жыл бұрын
I am happy that this helped you out. If the fuel can't get out the plunger pressures equalize on each end and will no longer be able to pump fuel. Check for a kinked return line. I learned that from working on a truck for a guy who had stepped on his while washing his windshield. Good Luck.
@oaktreejw
2 жыл бұрын
@@instructordave111 Working on 7.3 IDI I just replaced all of the caps and return lines on the engine so it’s something from the engine towards the tank out of all the videos that I watched trying to learn as much as possible yours is the only one that mentioned a blocked or clogged return line The only video that mentioned anything close to the subject was only the possibility of the check ball on top of the pump being stuck thanks again for the information and knowledge
@petersarvan
6 жыл бұрын
It's a valuable video for me thank you
@eskwyre57
10 жыл бұрын
This video is awesome. I'm curious to know who develop the cutout of the pump. They great job!
@instructordave111
9 жыл бұрын
If you read all the comments below you will see one by Ernie Johnson of Johnson cutaways. He is the one who made these sorts of excellent training tools.
@ASPCOT
5 жыл бұрын
Thanks Instructor Dave.
@raymondsteed4552
4 жыл бұрын
Iv watched this like a dozen times super good video, thank you!!
@instructordave111
4 жыл бұрын
Thanks Raymond, I hope it makes whatever fuel system work you are doing, easier to understand and diagnose.
@KantaBanes
Жыл бұрын
Excelente explicacion. Muchas gracias, profesor.
@instructordave111
Жыл бұрын
Thank you, I am happy that this old video is still helping people understand how it works.
@williskeesel6049
Ай бұрын
I have a very unique situation, my truck suddenly lost a lot of power and was blowing blue smoke. It acts as if the timing suddenly changes to be extremly retarded. It started doing so after driving for about 7 minutes, and then i had one last hoorah after replacing my mechanical transfer pump for a electric inline pump. Ive checked fuel filter, injectors, replaced head gasket (and studded,) ive checked for cavitation in the cylinders as this is a 7.3 idi, and ive checked for return line blockages.
@instructordave111
Ай бұрын
With our description I suggest that you open the inspection window to see if the internal rotor is turning when cranking the engine. If not you may have a broken pump drive shaft.
@yakubsohel903
10 жыл бұрын
Thank you for this video
@tomjohansen1514
8 жыл бұрын
With the three injector lines undone at the IP should fuel squirt out, even if it is out of time. Also pulled the top off, shutoff moves back and forth like it should, put it back together. Now not getting fuel in the bowl, plenty of fuel flow to the IP pump.
@instructordave111
8 жыл бұрын
Hi Tom, if there is fuel in the pump, the internal transfer pump is working properly and the metering valve is not in the fuel shut off position it should deliver fuel from the high pressure ports. Possibly the transfer pump is not working or the differential pressure valve is stuck in the open position. the electric lift pump is only there to deliver fuel to the internal transfer pump, which is there to deliver fuel at varying transfer pressures to the high pressure side of the pump. If this pump had any water in it and sat for a period of time some of the internal components may be frozen in place. It is actually not a complicated system, but many things have to work together at the same time to make the pump do what it was designed to do. .From your description it seems like the system from the tank to the inlet is working so whatever is the issue is in the pump Keep at it and let me know what you find.
@patrickbradley4339
3 жыл бұрын
What a great video
@magudtumano1084
3 жыл бұрын
Very good for me thank you.
@MW-gb7fe
8 жыл бұрын
Ok thanks great video
@MrUbiquitousTech
10 жыл бұрын
Thank you, very informative!
@kmcwhq
5 жыл бұрын
Is there a way to use fuel under pressure or air pressure to un-stick stuck plungers? Thanks
@instructordave111
5 жыл бұрын
Due to the design of the pump, I would not use air to try to free them up as there may be water or dirt in the air you are using. You may be able to pressurize the fuel pressure test port but you would have to be careful to not over do it and damage some of the internal components. You should be able to apply the same pressure as the pump would see at high rpm. You would need to check your specs for your pump to determine that. Due to the very minimal tolerances inside the pump I would not hold out much hope for this to work. Good luck !
@kmcwhq
5 жыл бұрын
@@instructordave111 Thanks Dave! But........what port is the Fuel Pressure Test port??
@instructordave111
5 жыл бұрын
Sorry I missed this question. The pressure test port is the black hex head plug near the top right side of the pump body in the beginning of the video. Hopefully you found the answer .
@ASPCOT
5 жыл бұрын
If I had been more patient and watched the entire video, I would have had my question answered! Whenever I have a pump rebuilt and they replaced the delivery valve, is the new valve lapped or mated in some other fashion to the seat in the rotor shaft?
@instructordave111
5 жыл бұрын
A new delivery valve would be a whole new assembly that is inserted into the rotor. The old one is removed and the new one is installed in it's place.
@michaelnelson9140
3 жыл бұрын
The dv is softer metal than the bore. So it wears but the bore does not. The dv maintains psi in the injection line, approx 500 psi less than injection psi. It helps the engine run smoother. Without it. The injection line to the injector would drop to no psi after each cycle, requiring more fuel to replenish the psi, and would cause a delay. All modern injection pumps utilize them.
@jaimecolina3521
8 жыл бұрын
Hello. great video. do you have some video or información for an stanadyne de diésel pum?
@michaelnelson9140
3 жыл бұрын
Stanadyne is Roosa master. Same pumps.
@mannfamilyMI
4 жыл бұрын
What a fantastic video. Thank you.
@instructordave111
4 жыл бұрын
Happy to be of assistance.
@christopherwanjohi2569
21 күн бұрын
Just subscribed❤
@abdallasakor894
6 жыл бұрын
Thank you so much for your help and I wish if there is more videos about diesel pump thank you thank you thank you is there is any video for the burkins 3 cylinder
@allisonlebel8534
6 жыл бұрын
I do not have any other pump videos other than the port and Helix explanation. Thank you for using the distributor pump video to learn how they work.
@kicheollee7857
Жыл бұрын
Great video!!
@jageshrampersaud8793
3 жыл бұрын
Very informative.
@reelvets
5 ай бұрын
That was awesome! I have been trying to figure out why my pump is not distributing fuel and now I think it's because the rotor isn't moving. Any idea what would cause that?
@instructordave111
5 ай бұрын
Possibly a broken drive shaft, but that is generally due to a siezed pump. You can take the timing/inspection window off of the side to see if the pump is turning when the engine cranks. keep us posted on what you find.
@alexlau7115
Жыл бұрын
awesome explaination man. a bit more light would make it perfect
@instructordave111
Жыл бұрын
Thanks for the message. I am now retired so that video is as good as I can ever make it be. Good luck with whatever you are working on.
@themadmailler
8 жыл бұрын
Good video! thanks for making it! Could you go more in depth into how those rollers and plungers work?
@instructordave111
8 жыл бұрын
+themadmailler The plungers are forced outwards by the incoming "metered" amount of fuel and then as the rotor turns the rollers contact the internal cam lobes and force the plungers back inwards towards each other. As the fuel is pushed from the area between the plungers the distribution port comes into alignment with the rotor and the fuel, under pressure, is delivered to the injector. I hope that is what you are looking for.
@themadmailler
8 жыл бұрын
Thank you!
@kennethmabus381
5 жыл бұрын
For anyone.....rebuilt DB in 64 jd3020. No fuel coming out ports. How smooth them plungers have to move back and forth? And would you say that they are spred out most the time so the cam hits them and drive that pressure?
@michaelnelson9140
3 жыл бұрын
Kenneth, the plungers must be absolutely free to move in and out. And because of the speed of the pump, they are always out unless the cam ring lobes are forcing them inward. As soon as they have rotated past the lobe,transfer pump psi pushes them outward to be charged for the next injection.
@keithjurena9319
2 жыл бұрын
Injected quantity is based on both the metering valve position (charge pressure, same as transfer pressure at wide open throttle) AND the charge duration which decreases with increased RPM. This is offset with the increased transfer pressure with RPM. Lower case pressure increases fueling as well as slightly advances timing since transfer pressure pushes the servo piston, rotating the cam ring. On the opposite side of this piston is case pressure.
@rickresendiz1871
8 жыл бұрын
If its a Cup seal, can i repair that myself? its coming from either the bottom or where it bolts. NOT the fuel lines side.
@instructordave111
8 жыл бұрын
Hi Rick, There is a "weep hole"in the area between the two Fuel cup seals that is there to let you know the seals are failing. Do not JB weld over this hole or you will end up with the fuel getting into the oil pan and that will cause a bunch more engine issues. The cup seals can be changed by you if you are a little bit mechanically inclined. Set the engine at #1 cylinder on compression using the Cummins pin , make a mark from the pump housing to the front cover, remove the fuel lines from the pump, remove the pump from the engine ( you may need a puller to loosen the gear from the tapered shaft. Don't lose the key into the engine when you do that part. Remove the pump drive shaft and change the cup seals. Some manufacturers sell a seal installer tool when you get the new seals. When you reinstall the pump driveshaft, make sure the seals don't flip back using the tool and absolutely be sure the driveshaft timing marks are lined up inside the pump. When everything is apart, be sure that the engine or the pump do not move or resetting the timing could be an issue. Good Luck with your project.
@rodrigobulman4624
6 жыл бұрын
Great Video!! Thanks for the explanations you gave, but I do have a question. Can you use this pump without a sending/lifting pump? What are the consequences? Thank you!
@instructordave111
6 жыл бұрын
Rodrigo Bulman, you may be able to run it that way if the fuel tank is above the pump so it gets some head pressure. Generally there needs to be 3 to 5 psi and enough fule flow for the pump to work properly. Low power and hard start would be the first consequences that you notice.
@michaelnelson9140
3 жыл бұрын
What the author says is correct, but it was common on older tractors with similar pumps to gravity feed them.
@arvintago7759
11 жыл бұрын
this video helps. thank you
@joequillun7790
5 жыл бұрын
Wow. Great video Dave. Would this be a Standadyne or Roosamaster DB2 style pump? Thanks for sharing your knowledge. :)
@instructordave111
5 жыл бұрын
Thanks Joe, it is a Roosamaster DB2 made by Stanadyne.
@mikemcgrew65
5 жыл бұрын
instructordave111 if I remember correctly Roosamaster was bought by Standyne
@ThienNguyenvan-nq2mr
2 жыл бұрын
Thanks
@aviationspotter12
8 жыл бұрын
But how does the fuel get from the top part to the advanced piston?
@instructordave111
8 жыл бұрын
There is a drilled passage that allows transfer pressure fuel to act upon the advance piston. As the speed increases the transfer pressure also increases and the advance piston is moved against the spring even further to advance the BOI.
@alpinehs
4 жыл бұрын
Excellent education
@CopperheadWelding
9 жыл бұрын
Hi my name is Matthew Lazarin. Your video has taught me alot. But I'm still having a lack of knowledge on how or what would cause a runaway on the 6.2 diesel gmc. I believe I was the that caused it to do so but not to sure EXACTLY HOW IT WOULD DO SO. I recently was out at the dunes doing some off Roading. I stoped on a hill going downwards. 1 min passes and the engine shuts off. Do I decided to push the truck to a level ground so see if the pick up pump was able to suck fuel up. Still nothing. No start. Then I opened the pressure dome and decided to move the linkage inside thinking that maybe something got bound up inside. Do I closed is all up I cranked it over and the engine decided to RUNAWAY from me past governor limits. I was able to shut it off about 30 40 seconds later. So when I was able to bring it home after being towed I decided to try it again and crank it over once I crank it over I decided to run away again for me but I was able to shut it off again by choking out the air flow to the engine. So now I've just left it all alone and I've been trying to do a lot of research on how or what would have caused this run away how can I fix it hopefully you can reply back to this or email me or maybe even call me MatthewLazarin@yahoo.com
@instructordave111
9 жыл бұрын
Matthew Laced Hi Matthew, I am guessing that first the engine may have died due to the pick up tube getting some air ( fuel level very low or a cracked tube possibly from the off roading fuel slosh action ?) Second when the linkage was moved around in the housing did a lever become disconnected inside? the governor is not controlling the fuelling to pull back on the fuel when the engine overspeeds. Maybe the metering valve became disconnected and is now letting wide open fuel enter the pumping chamber. That is why the electric or manual shutoff lever isn't doing it's job because it can't rotate the metering valve back to closed. You will have to carefully inspect the linkage again. Try reading this article. Good Luck @0809
@instructordave111
9 жыл бұрын
instructordave111 looks like the link didn't work. Google search "Stanadyne DB2 Injection Pump" there is a good article in Dieselpower magazine about it.
@CopperheadWelding
9 жыл бұрын
yeah that's what I was thinking that the fuel wasn't getting through the tube shut the truck off. From what I've seen nothing has been disconnected, but I will go outside and check to see if anything is disconnected, I'm also kind of curious on how exactly you put the pressure dome back on correctly. I will write back when I'm finished looking at the linkage .
@nasrahmed6236
Жыл бұрын
Thanks alot
@leonardmorse5796
5 жыл бұрын
What would cause the throttle to start sticking out of the blue it's been rebuilt
@instructordave111
5 жыл бұрын
Could be many things. start with the easy stuff, misaligned cables or linkage, kinked return lines etc. Internally it could be dirty fuel, flyweight not reacting or stuck, inlet valve issues, regulating valve issues, sticking check ball. Rebuilt doesn't mean operating correctly. My apologies to your rebuilder, we all miss things once in a while
@kevinm8973
7 жыл бұрын
Thanks for the video 150
@leannebrown2347
10 жыл бұрын
I have a 70's 644-aa loader that has this pump. Freshly rebuilt 407 jd engine and i have the problem of the pump overfueling causing hard starting, hot or cold and alot of smoke. Can this pump be turned down or up or does pump wear cause the overfueling?
@instructordave111
10 жыл бұрын
I am assuming that the engine was rebuilt, but the pump was not? What makes you believe it is over fuelling? A worn pump should actually inject less fuel than too much due to extra internal leakage. Was the pump timed to the engine properly when the engine was rebuilt? What color smoke do you have, white or black ? Set engine to TDC on No 1 cylinder and then open inspection window to see if the timing marks on the pump line up. If the pump is off by 1 degree at the pump it is 2 degrees off in the cylinder timing.
@leannebrown2347
10 жыл бұрын
Thanks for commenting back. Yes your correct. the motor is fresh from the crank up but the pump is not. I had a local j.d mechanic time the pump and engine but you never know. The smoke is black and thick. As soon as you hit the starter button, here comes the smoke rings. I have to either it every time we start it. It runs great once started, good power no oil loss, but rolls coal all the time as they say, but if it sits for 5 min, back to the juice we go. Im a gas mechanic so diesel engines are kind of left field for me. I will check the pump timing through that window and see what i get. Anymore input you might have on this is highly appreciated and thank you for taking the time to info me.
@instructordave111
10 жыл бұрын
leanne brown No problem, since it is a 70's vintage engine, there would be no emissions equipment on it, is it turbocharged? Did you have the injectors tested. Black smoke is either too much fuel or not enough air. Too much fuel can be due to the pump being adjusted for more fuel than the engine can use or the injectors allowing more fuel to flow into the cylinder than normal. How was it running before the rebuild? Hard starting could be from incorrect pump timing, unatomized fuel from worn injectors or worn cylinders not developing pressure to fire the injectors. I know you said you had good power, but if it's black smoking you had better keep an eye on overheating the engine and this could also wash down the cylinders and ruin the rings, pistons and cylinder walls ( Sort of like having pre-ignition in a gas engine). Verify that the air intake system is completely clear and the filter is clean and then you may need to have the injectors and the pump tested. Good Luck and let me know what you find out.
@leannebrown2347
10 жыл бұрын
The injectors are all rebuilt. She is turbocharged. I believe someone turned the fuel up back in the day cause it was wore slick out when we bought it and rebuilt it. Extreme blow-by, but it starts and black smokes like it did before the rebuild. john deere said you couldn't turn up delivery on these pumps that you could only adjust rpm so that confused me. Intake,filters and all are great. Everything gone through except the pump. Can these stanadyne pumps be turned up and down?
@instructordave111
10 жыл бұрын
leanne brown You are more than likely correct about the pump being adjusted for more fuel or a pump from a more powerful engine was installed on the loader. There is a leaf spring inside the pump that can be adjusted to change the maximum amount of fuel the pump can deliver, but it requires disassembly of the pump to do it. Nothing external that would make it easy to do. Here is a very good article about how this pump is constructed and how it works. www.dieselpowermag.com/tech/general/0809dp_stanadyne_db2_injection_pump Check to be sure the pump is the one for that particular engine if not then it may be best to exchange the pump for the one that is supposed to be on that engine. Running the engine in an over fuelling condition is going to take the engine out again.
@EvenStarLoveAnanda
9 жыл бұрын
Could you make a video on how to replace the cup seals? Or just tell me in reply to my comment. I am not able to remove the distributor. What is the easiest way to replace the seals? Thanks
@instructordave111
9 жыл бұрын
EvenStar LoveAnanda Unless you have a gear drive that can be removed from the front of the engine, you will not be able to change the cup seals without removing the pump drive shaft. The pump drive shaft needs to slide out from the front of the Stanadyne DB2 pump and there is a special tool that you can probably borrow to install the shaft with the new cup seals. It is designed to keep the seals from flipping over on installation. Also make sure you have the pump shaft timing marks in the correct position or you will be out by 180 degrees of pump rotation. check this bulletin from Stanadyne @559
@tranthien5650
8 жыл бұрын
what is name of the pump "full name" thank you
@instructordave111
8 жыл бұрын
it is a Stanadyne DB2 high pressure fuel pump.
@tranthien5650
8 жыл бұрын
thank you very much
@agustinsanchez358
4 жыл бұрын
Hi! It's an interesting video and very practical. I have a problem with a gen set when I start the engine, it start out of frequency range and decrease slowly the rpm until reach the nominal frecuency. This occurs in about 1:30 minutes. Why could happen that? Thanks!
@instructordave111
4 жыл бұрын
Based on limited information and assuming the genset is equipped with this type of fuel pump. I would guess that there may be something that is keeping the fly weights from bringing the rpms down to the speed setting for you generator. Spring settings may have been adjusted to a higher speed than is required. Hard to give a definitive answer from a distance.
@christianriedel7017
8 жыл бұрын
This is such an awesome video, thank you for sharing. I currently have an engine I swapped in and am trying to get going. I have my IP off my old engine on there and I wasn't able to get it going. I put an electric pump on the frame rail in place of the mechanical pump, it used to fill the return line as soon as the key was on, but now it barely makes it out of the pump. I'm thinking the pump is plugged. What are your thoughts?
@instructordave111
8 жыл бұрын
+Christian Riedel Hey Christian, I will need a bit more info as you don't mention if the engine tries to fire up and wont keep running, are you getting any smoke from the exhaust, what is the engine that you swapped the injection pump off of and on to?? There could be many things that prevent the engine from starting, is it timed correctly, is the return check ball plugged, does fuel flow when you remove the fitting on the top of the pump? Check a few more things and maybe we can get it sorted out. Dave
@christianriedel7017
8 жыл бұрын
+instructordave111 Thanks for the reply dave...my new compression tester came in last night...and told me that the engine is coming out...first cylinder was 5psi, second was 200...I didn't bother checking the rest after that. Just two bellhousing bolts holding it in at this point, I'm pulling it out the rest of the way after work. I'm kind of glad, because I'm pretty damn good with these engines and I was just so stumped as to what was going on and why I couldn't get it running. It's getting a 120k mile running 7.3 now. Thanks again for the reply.
@instructordave111
8 жыл бұрын
+Christian Riedel Hey Christian, I'm glad you found the issue. Low compression is really bad for starting a diesel.Good Luck with the next engine. 7.3's were a great engine, just loud when cold.
@michaelnelson9140
3 жыл бұрын
Housing psi is 8 to 12 psi.
@MacRobbSimpson
10 жыл бұрын
Is this a Stanadyne DB2 pump?
@instructordave111
10 жыл бұрын
Yes it is the DB2 pump from Stanadyne.
@kevinhocker5451
4 жыл бұрын
Thanks for the video. I have a question if I could , I just reassembled A DB 2 pump on a 6.2 diesel out of a 1982 Chevrolet pick up and it has a surge and low power I was wondering if I would have assembled that pump a 180゚ out of time would it have even run . The truck will run and drive just low power and annoying idle . Thank you .
@instructordave111
4 жыл бұрын
Could be a few things, governor linkages could be misaligned or binding, pump out by 180 would surprise me if it ran at all, check that the return line is clear and the check ball is in the return line fitting. Lift pump getting enough fuel to the transfer pump.
@kevinhocker5451
4 жыл бұрын
@@instructordave111 Thank you
@maricelbarete5676
10 жыл бұрын
can teach how to test a 4D56 mitsubishi injection pump
@ildkild
5 жыл бұрын
I have one question tho... If transfer quantity determines how far apart the plungers move than isnt the timimg affected by the fuel quantity. As in the regular plunger pump the plunger starts building pressure at the beginning of the stroke and quantity is regulated with a bleed port. But in this configuration in low fuel quantities wont the plunger start building pressure later thus affecting the timing? I am sure i am missing something here i have come across this type of pump a few times and it causes sleepless nights not understanding how it works, hope you can answer me or link me tawards something that can. Thank you in advance!
@instructordave111
5 жыл бұрын
The lower helix plunger is the one you are referencing as a comparison to this pump. There is also an upper helix plunger that works similar to how the timing is affected by the plungers and fuel quantity in this distributor pump. I also have a video explaining the function of both of those. You are correct in that the quantity of fuel affects the BOI (beginning of Injection) timing in the distributor pump. The EOI (End of Injection) is fixed as far as the rollers and plungers reaching the top of the internal cam lobe. The effect of this is when the engine is at low fuel requirements and low speed, the later BOI allows the cylinder to build a little more heat to allow for better ignition of the fuel. At higher speeds and fuel requirements the piston speed increases the temperature quicker and the resulting advancement of the BOI allows the combustion event to start sooner so it can be completed at the proper point in the pistons travel. I hope that helps and lets you sleep better.
@instructordave111
5 жыл бұрын
Here is a link to the upper and lower helix plungers kzitem.info/news/bejne/zqmelomFfXennJw
@ildkild
5 жыл бұрын
@@instructordave111 thank you so much for putting my mind at ease 😃
@youssefbenchehla2505
7 ай бұрын
👍👍👍👍👍👍👍👍👍👍
@Rocky-ug1ng
8 жыл бұрын
I have a old IH td6 dozer with a stuck plunger, will the whole pump need to be removed to repair?
@allisonlebel8534
8 жыл бұрын
I'm afraid your pump will need to be removed and rebuilt if the plungers are stuck. You may try filling the pump with fuel conditioner, but I doubt that you will have any success just trying that. If they got some water in them they will likely be rusted in place.
@Rocky-ug1ng
8 жыл бұрын
thanks, ill give that a try.
@HafeezKhan-qi7jj
3 жыл бұрын
tell me about jonder 6068pump
@popswrench2
8 жыл бұрын
showed this vid to coupla college boys from Morrisville & Cobbleskill ; claimed lernt more than in their own diesel courses .
@instructordave111
8 жыл бұрын
+pops wrench Glad that this old video is still of some use out there. Thanks for the comment!
@popswrench2
8 жыл бұрын
i'm an OOOOOOOOOOOOOOLD coblskill an Ag Eng grad found interesting as i changed out many of these old fuel jammers . and a new electronic on a JD 160 excavator . proper TIMING TOOLS all goes well .
@4x4American
8 жыл бұрын
I went to Morrisville too for diesel technology, and I didn't learn much there..it was a really crappy major. We started with over 90 kids and maybe 12 of us graduated, what does that tell you right there...this video was far more informative than any class or lecture. We did such a ridiculous amount of on paper, math formulas and diagram looking at, and hardly any hands on work. It might have been a 1:20 ratio of book to hands on work. Thanks for a great video.
@popswrench2
8 жыл бұрын
Work with recent 2yr morrisville grad. He says our work when he was intern changed some of program.
@4x4American
8 жыл бұрын
Yea 4 good buddy you're comin in cruddy can you gimme a 10-9 on that
@jeffpayne232
6 жыл бұрын
If i have solid fuel coming into pump, and 50/50 mix of fuel and bubbles from return outlet, its pump seals?
@instructordave111
6 жыл бұрын
jeff payne how does it run? Do a spill back test into a large bucket to see if you are getting enough return fuel. These pumps naturally aerate the return fuel to a certain extent. Maybe internal transfer pump issue, loose or pressure regulating valve not set correctly. Seals would leak from weep hole or dilute the engine oil. Keep me posted on what you find.
@jeffpayne232
6 жыл бұрын
instructordave111
@jeffpayne232
6 жыл бұрын
instructordave111 She runs like a top when i get her primed. New injectors, pump is about a year or so old. Very few miles since install at a reputable shop. Started and drove fine for about 6 weeks after injectors installed. Then one morning, no start. Fuel from return line had bled back to tank. Isolated the air intrusion with clear lines and can watch fuel bubbles leave pump. If i turn truck off, and immediagly restart, no problem. If she sits more then 10 seconds she loses prime and must be reblead. After hours of research ,i am believing the seals in pump are shot, thus creating an internal vacuum when shut off and filling return with air. Thank you for your time both in posting a very informative video, and responding so promptly.
@instructordave111
6 жыл бұрын
jeff payne check for cracked or leaking fittings or pump housing gaskets that may be leaking. Isolate the fuel system to a fuel can to see if there are any improvements.
@jeffpayne232
6 жыл бұрын
instructordave111 Ill check the outlet , check valve and brass fuel fitting, as thw inlet line is new, clear line with compression fitting. The inlet line is clear and bubble free at all times. I can see fuel, no bubbles into pump after days of sitting. The clear return line is the fuel bubble mix, but when i shut truck off, it all drains rapidly from last injector to fuel can on ground. If i hopd line down in a loop, ypu can see a bubble now and again coming out of return line. Thats what lead me to believe the pump is sucking air and draining prime.
@Parents_of_Twins
6 жыл бұрын
Very helpful. So if I want to increase the overall amount of fuel that's available do I increase the size of the plungers and the metering valve or will increasing the size of the plungers do the trick? Thanks to anyone who can answer this question.
@instructordave111
6 жыл бұрын
To increase fuel delivery on this pump, you can adjust the roller spring to allow the plungers to deliver the max fuel that they are designed for, but you can not change to bigger plungers etc. These pumps are only good for up to approximately 250 hp and then you are better off to go to an inline style pump for more fuel delivery capabilities. I'm sure there are instances where someone has a pump like this at more than 250 hp but those would be limited instances. IMHO
@Parents_of_Twins
6 жыл бұрын
Thanks for the info. About 250 HP is about what I'm looking for out of this particular build. I know there are a couple of companies out there that are getting close to 200cc out of the pumps that are available for the 7.3 IDI. I'm not looking to get more than maybe 110cc out of a pump and since I have a couple that are currently not working I thought I would try to do it myself rather than pay several hundred to someone else. Worse case scenario it doesn't work and I have to order a pump but I learn something about these pumps in the process.
@instructordave111
6 жыл бұрын
Parent of Twins if you are willing to experiment and learn something that is great. Just make sure you are working in as clean a place as possible. These wont tolerate any dirt getting into them. Measure the spring height and then tighten the screw to allow the rollers to deliver more fuel. Good luck.
@Parents_of_Twins
6 жыл бұрын
Thanks for the info, advice, and video.
@travishanson166
5 жыл бұрын
Altering the profile of the metering valve can alter the torque curve. As for increasing flow or volume, you can have the plungers ground shorter and a custom cam ring with a faster rise and longer stroke to match the shorter plungers. There are many machine shops out there who could make the cam and regrind your plungers for a reasonable price. Another option is to just recut the profile of the cam without altering the plunger. A larger base circle would increase stroke length of the plungers . These are nice purpose built pumps with room for some fun. If someone was ambitious enough, a split shot cam profile could be produced.
@enednas801
9 жыл бұрын
I have a zetor tractor 6045 with PAL inline pump. id like to adjust up the fuel amount so id get 5-10hp more.its only 58hp but other models have same engine but 70hp only due to pump adjustment. guess i have to find a exploded view of that pump to locate main adjustment. on japanse rotary pump its done in 5 min. release a lock nut ant turn the screw in the middle and your done :p
@instructordave111
9 жыл бұрын
You may be able to adjust timing slightly and the rack travel slightly, but likely going up a size or two with the injectors will get you more power. Good Luck. I don't have an exploded view of your pump. www.motorpal.cz/en/products/fuel-injection-pumps
@enednas801
9 жыл бұрын
Thanks alot,i`ll give it a try :)
@casimirobuenabista
5 жыл бұрын
This things are complicated.. Maibe just replace the whole thing once is damaged.... 😆
@instructordave111
5 жыл бұрын
That is sometimes the course of action to take, but knowing how the components work is what makes a good mechanic able to properly diagnose the problem. We live in a replace it era now, but you still have to be sure you are replacing the correct parts to make an efficient cost effective repair.
@casimirobuenabista
5 жыл бұрын
@@instructordave111 yea....
@patelghanshyam2661
7 жыл бұрын
you can give animated video...!!
@instructordave111
7 жыл бұрын
Sorry no animations of this pump. There is an old Stanadyne video that is partially animated but that is all that I know of.
@twistedamericanchopshop6319
6 жыл бұрын
Instructordave111, I recently purchased a db2 pump from a not so great company. For the most part the pump works great. My issue is it won't idle down. It's like it's stuck with fast idle engaged but it's not, guessing around 1200 to 1500 rpm. This is on a 6.2 diesel in a 1983 chevy truck. A friend told me the governor spring might be weak. Could that be all that's wrong with it, bad governor spring? Or what other possible issues should I look for? Thanks.
@instructordave111
6 жыл бұрын
Possibly the idle spring is broken or missing which would allow the idle to be high. A weak governor spring would not allow the engine to rev to higher rpm's as the flyweights would overcome the spring more easily and slow the engine down. Also there ma be a flyweight mechanism issue which won't allow the pump to return to a less fuel position.
@twistedamericanchopshop6319
6 жыл бұрын
instructordave111 that's the spring under the top cover that is on the cap head screw Correct?
@instructordave111
6 жыл бұрын
Yes there are a few springs under that cover so be very careful what you do in there. Was this a rebuilt pump from the place you bought it? They should look into it if there is warranty. Is the throttle cable allowing it to go to idle? Mayne the adjusting screws are not set correctly.
@SunilSundar
8 жыл бұрын
so it controls the amount of fuel but not the end of injection? doesn't this cause variation in injection pressure from cycle to cycle?
@allisonlebel8534
8 жыл бұрын
The injection pressure from one cycle to the next will remain constant if the engine speed remains constant. Injection pressure is the result of the fuel going through the injector. If the amount of injected fuel is increased the injection pressure goes up because the injector nozzle doesn't change it's hole sizes but the plungers will still be forcing the quantity of fuel out to the cylinder.What this means is that at any given speed you will have a constant injection pressure for that speed. At low idle speeds you need very little fuel and have a relatively long time to inject it. Where at high speeds you need more fuel to be injected and have much less time to complete the injection so the injection pressure must go up considerably to accomplish that. This pump will go from around 5,000psi injection pressure at idle to upwards of 23,000 psi at high speeds under load. For each situation the injector nozzle does not change so more fuel in less time makes higher injection pressure.
@instructordave111
8 жыл бұрын
Sorry my wife was logged in when I answered some questions below so it shows up as her answering.
@SunilSundar
8 жыл бұрын
haha. is this a better system than the bosch ve where you actually control the end of injection? I realize that mightnt be a meaningful question
@instructordave111
8 жыл бұрын
Both systems work so I am not sure I would place one as better than the other. In a distributor pump you are limited by the design so they are not found on anything with very high horsepower due to the fuel delivery limitations.A sharp, fully atomized beginning of injection is more important than the end of injection in my opinion.
@SunilSundar
8 жыл бұрын
I originally came to your channel because I'm working on designing a pump for a single cyliinder engine. it's going to be like a PF pump but i want to have a control sleeve instead of a helix and rack. it won't have a feed pump so I can't use this type of advance. do you know of a centrifugal advance system that I could use?
@RuralTowner
7 жыл бұрын
Having an issue with a Roosa Master on an '81 Waukesha mated to a MIller welder...that won't start after installing a new solenoid since the old one would no longer engage. It was working when last used though required firm tapping to shut off since the old solenoid wouldn't un-stick. Am I to understand correctly that the functions of the upper housing on this one still work the same? IE the rod below the solenoid slides FWD//BWD? When attempted to check how the solenoid fit in...since impossible to do so with the new one I used the old...I could see where the foot of the lever would ride but couldn't get that flat rod (6:12 for reference" to slide.
@instructordave111
7 жыл бұрын
RuralTowner as far as i know they are the same. Make sure the diode is installed correctly across the two terminals
@RuralTowner
7 жыл бұрын
The solenoid is powering up with a definite CLICK. Am looking at a couple other videos and posting questions as well but I THINK i see now what might be going on. Just noticed that it looks like the foot hooks around another tab on the slide below as it seems to appear in this cut-away?
@allisonlebel8534
7 жыл бұрын
You definitely have to have all the linkages connected properly for this system to deliver the fuel. Check it all carefully, I know it's a tight spot to work in.
@RuralTowner
7 жыл бұрын
Seems on mine the solenoid foot wont go around the tab but instead sits behind it. Powered on the slide moves back on its own into the RUN position. Powered off the foot seems to press the tab and thus the slide to OFF. But I think it is trying to jam since it won't quite shut off all the way. Took some working even by finger-force to get it to move then free up. Engine RPMs drop but won't go off without some tapping on pump. Carefully open up the foot a little more so it fits around the tab? Even the old solenoid didn't seem to want to go on? Or might I be missing something on install.
@instructordave111
7 жыл бұрын
I am guessing that you have something misaligned in the linkages, possibly some worn out items or adjustment screws that are causing the binding linkage.
@luisgiovannyroaalbarracin4482
3 жыл бұрын
Cómo puedo oír el vídeo en español
@instructordave111
3 жыл бұрын
Sorry I do not speak Spanish.
@therescuerangerdale
5 жыл бұрын
What is the difference between a DB2 and DB4?
@instructordave111
5 жыл бұрын
The DB2 has 2 plungers and the DB4 has 4 plungers and can deliver more fuel. That sounds good on the surface, but they require a pump stand to adjust and sync the plungers correctly. If not set properly it will give you many headaches.
@therescuerangerdale
5 жыл бұрын
instructordave111 Thank you Dave, with that being the case could you build a DB4 for a ford 7.3idi turbo that has been inter cooled? I see you travel Montana, I'm in billings.
@instructordave111
5 жыл бұрын
@@therescuerangerdale I have never tried that, but I think it should be possible. Just be sure the DB4 is absolutely set up properly for what you are trying to do. A fuel injection shop would likely be able to answer that question more accurately than I can. I have not been through Billings for a while, maybe a bike trip this coming year will change that. Good Luck
@125jesusfreak
5 жыл бұрын
@instructordave111 is it possible or a good/bad idea to install solenoid-operated high-pressure redirection (y) valves in 4 out of 8 injector lines to redirect fuel back to the tank for the purpose of increasing efficiency? Basicaly, the idea I have is that if I can reduce fuel supply to the cylinders without affecting the injection pump's operation then the engine will be able to sip fuel under low load conditions. Could I install those redirect valves to "turn off" every other cylinder in the firing order and drain them back into the fuel tank?
@instructordave111
5 жыл бұрын
Hi Craig, I am sure anything is possible with enough time and money spent. I am not sure you would end up with the result you are wanting as the engine is going to use enough fuel in the remaining cylinders to carry the load that is placed on it. I am thinking that taking fuel away from half the cylinders will require the remaining cylinders to increase the fuel rate to compensate and it may also cause the engine to run in an unbalanced state with the power pulses being uneven on the crankshaft. However, let me know how it works out if you do this project.
@125jesusfreak
5 жыл бұрын
@@instructordave111 Thanks. My idea for this is to be used during low load situations, like sitting in traffic jams or cruising at highway speeds where you don't need the full power capability of the engine to maintain speed. If i'm not mistaken, then there wouldn't be a load that would require extra fuel to be spent in the remaining four cylinders. Also, if I shut off every other cylinder in the firing order, would it maintain engine balance due to the engine's geometric symmetry of the firing cycle - for example, the 93 IDI fires with (1,(2),7,(3),4,(5),6,(8))? Also, balance aside, would the injector line redirection affect the fuel pump's supply rate/cycle at all or would it continue as if all 8 were firing? because from the pump's "perspective" they are all firing because it's sending fuel to those every other "cylinders." Thanks so much for your expertise and input!!
@instructordave111
5 жыл бұрын
I am not saying it won't work and the every other cylinder may work. The pump itself however may be negatively affected by the pressure being variable from one cylinder to the next. Even at cruising speeds the rpm of the pump will create a high pressure injection through the injector and then no pressure on the released cylinder. As I said, I would be interested to know the results of your experiment. Good luck.
@125jesusfreak
5 жыл бұрын
@@instructordave111 Thanks again, you are a great help!
@instructordave111
5 жыл бұрын
@@125jesusfreak I am not sure I helped you at all but wish you luck on this idea.
@aaronhilt91
10 жыл бұрын
What does this pump go to
@instructordave111
10 жыл бұрын
Hi Aaron, this is a distributor or Rotary fuel pump designed for diesel engines usually smaller than 250 hp.
@rickresendiz1871
8 жыл бұрын
Awesome video. I own a personal vehicle that is a 6.9. Its leaking from the bottom of the pump. somewhere. Not the fuel lines though, I made sure. it leaks very little. I can drive it around no problem. No air intrusion in the lines. engine still has its full power it seems. Any suggestions? I was thinking of putting JB weld. but something tells me that wont work... Sad day for the 6.9 engine. Thank you for the video. I plan on keeping this truck until i die. its fun learning about it.
@S._Collection
7 жыл бұрын
Its informative adjustments and working proceedure of speed limiters should be added
@mdnirale1210
3 жыл бұрын
Good
@MultiJones1979
9 жыл бұрын
ok i watched the video 3 time's to try to figure this out my self but ??? QUESTION..what if you have solid fuel going in the front of the injection pump and solid fuel coming out of back to tank return but nothing going to the injector's..fss is working but still no fuel..what causes this and could you make a short video maby explaining this with this pump you have in the video..this information would be very helpful if you can provide it..thank you
@instructordave111
9 жыл бұрын
I will need a bit more explanation of your situation. I am assuming that you have a non starting engine. Do you have an electric fuel supply pump? If you have an electric supply or transfer pump before the distributor pump in the video, you will end up with fuel going into the distributor pump and returning to the tank, you will never have fuel coming out of the injection lines this way. The only way fuel will come out of the injector lines is if the opposed plungers force the fuel out to the injector and that only happens when the pump is rotating internally with a good supply of fuel to fill the pumping chamber. If the stop solenoid is working then you may have a pump drive shaft that is sheared or possibly a metering valve that is staying in the no fuel position. What was the machine doing just before the problem?
@MultiJones1979
9 жыл бұрын
instructordave111 thank you for replying so fast..im working on this at this very moment.. i have a 7.3 idi new mechanical lift pump on motor new fuel filter everything is ran as it should be from factory..truck ran good and then no fuel so i replaced the pump and filter and then still no results so i replaced the injection pump with one from a "running 7.3 idi" that was driven in with a bad head gasket unsure how long it sat..its weird no air intrusion and a solid stream at schrader valve and at front injection pump..
@instructordave111
9 жыл бұрын
Ron Jones It sounds like you have checked all the simple stuff. So no fuel from the injection pump while cranking? Even if it was timed 180 degrees off there should still be fuel at the injection fittings. There aren't that many things that can cause your issue. Just make sure you cover all the basics. Make sure the pump is actually spinning when you crank the engine etc. I will have to think on this some more. Make sure the return line is absolutely clear back to the tank. try to run it on a separate fuel system such as a jerry can to eliminate the trucks fuel system as a problem.
@MultiJones1979
9 жыл бұрын
instructordave111 lol yes sir already did that to..new 5 gallon drum with 5 fresh gallons of fuel and the line fixed in the center of the fuel and being watched and held just to be sure then-bled system again and still nothing from the injector line's.. when fuel does comes out of these lines what psi does it come out at...should it be a light stream or pulse or spray etc..
@instructordave111
9 жыл бұрын
Ron Jones The fuel will be approximately 2000 psi at minimum from the injection lines so do not check them with your hand. Each fitting will have a quick spray as the fuel is delivered.. Are you absolutely sure that the fuel solenoid is working? it sounds like there is no fuel getting to the pumping chamber and the only way fuel gets there is by going past the inlet metering valve. If that valve is not opening there will never be any fuel delivery to the injectors.
@chuckkrutzler6895
9 жыл бұрын
At the very end of your video, you talk about what happens if the return line is blocked. This is the first time that I have run into this comment. I have been looking for the reason that one of my engines stops whenever I raise power for the last several years. Would this happen with a CAV pump on a Perkins T6.354? I have replaced everything from the fuel pick tube to the CAV pump, and cleaned the filter at the CAV inlet with no success.
@instructordave111
9 жыл бұрын
Check the return line all the way from the fitting in the pump ( it should have a small regulator spring and valve in it ) to the tank. I have seen where a kinked pipe or hose can restrict flow enough to cause running issues. Make sure nothing is clamping the return line, like a bracket or bolt. Ziptie's that are too tight on a rubber return line are also something to watch for. Does the engine completely stop or just lose power? Don't discount the supply side or the stand pipe in the tank either. Good Luck
@chuckkrutzler6895
9 жыл бұрын
instructordave111 The engine completely stops when put under load. Runs fine at the dock at idle and full rpm under no load, will also run in gear with no load, when bringing the boat up on plane it will stop after a minute or so. I will check all the return fuel lines to see if there are any restrictions. ( I already replaced the stand pipe when I found a hairline crack about four inches from the bottom, thought it was sucking air when the fuel was low. Not the problem.) Will let you know what I find in the return lines.
@instructordave111
9 жыл бұрын
Chuck Krutzler Is the tank baffled well enough to keep the fuel from washing away from the standpipe under acceleration?
@chuckkrutzler6895
9 жыл бұрын
instructordave111 yes. Also, never had this problem with the starboard tank and engine.
@instructordave111
9 жыл бұрын
Chuck Krutzler To eliminate the fuel system, you could run the engine in question with separate fuel lines and a jerry can to see if the problem is with the engine or the fuel system. Has the lift pump that supplies the injection pump been looked at?
@SunilSundar
7 жыл бұрын
Hello Dave, could you please tell me what the start of injection timing should be (in crank angle BTDC) for an automotive engine. What should should it be at fully retarded (low idle) and at max rpm (fully advanced). Thanks
@instructordave111
7 жыл бұрын
Hi Sunil, BOI will depend on the engine manufacturers design requirements and even the size of the engine will have an effect. I am going to relate my answer to a mechanical fuel system as the electronic systems can vary the timing and the length of delivery time based on input from the ECM. In general at low RPM and idle you would want the timing to begin injection from around 5 deg BTDC to even a few deg. ATDC. The piston is moving relatively slowly and the fuel injected is minimal so not much heat is produced to ignite the fuel. As RPM rises, the pistons are squeezing the air much faster and the quantity of fuel is increased so the timing must be advanced to give the fuel time to evaporate, ignite and release the energy on the down stroke. This can be up to 30 deg. BTDC on SOME engines. The key is to not have the main pressure rise in the cylinder happen until the piston is a few deg. past TDC. This will allow the engine to produce the most and longest duration of pressure on the piston's power stroke. I am not an engineer so I could not give you exact numbers for your application and much of this is information becomes skewed once engine performance modifications have been done. I hope this helps.
@SunilSundar
7 жыл бұрын
instructordave111 thank you dave! this clears up a lot of basic questions for me. One more question; what are the two spacers in the stanadyne/lucas pump for? (the two thin rectangular plates with rectangular slots, under the roller shoes)
@instructordave111
7 жыл бұрын
If I am understanding your question correctly, those are the opposed plungers and when they are forced together by the roller and shoe riding up on a cam lobe, they force the fuel out from between them and this is what becomes the injected fuel.
@SunilSundar
7 жыл бұрын
instructordave111 sorry. that was probably a badly phrased question. I'm not talking about the plungers. there's two thin plates under the shoes...
@SunilSundar
7 жыл бұрын
instructordave111 i took apart a delphi pump and I'm trying to figure out the parts. I'll make video and send you a link
@leviskuse3122
8 жыл бұрын
Hi @instructordave111 , I have this same model pump all torn apart on my work bench, trying to turn DOWN my fuel delivery because the last eBay owner had it set way to high. my motor will hydrolock with too much diesel when a heavy load gets put on it. I really need your best answer even if you do not know, I can't afford to bring it in because i blew all my $ on buying the pump. I have searched hundreds of videos, and left all relevant comments on my problem and nobody replies so i was hoping you would know. Thank you @instructordave111
@instructordave111
8 жыл бұрын
Hi Levi, on this pump the amount of fuel delivered can be reduced by turning the plunger spring bolt out, away from the rotor. this limits the amount of fuel that can be loaded between the plungers. it will be hard to get it right without a test bench but if you are comfortable with taking it apart a few times you may get lucky. Just make sure all components are kept extremely clean while you are doing anything inside the pump.
@leviskuse3122
8 жыл бұрын
Oh thank you very much instructordave111 , So when I screw the spring bolt out will it remain secure? all i have to do is turn it out and it shouldn't come loose when i start running the motor? I am not home right now, so i can't look at the pump. Just checking to be sure is this the spring bolt you are talking about? image.trucktrend.com/f/tech/general/10383424%20w799%20h499%20cr1%20ar0/0809dp_04_z+stanadyne_db2_injection_pump+pump_elements.jpg The leaf spring bolt? if not, I know I must be close you know.
@instructordave111
8 жыл бұрын
Hi Levi, As with any internal fastener, I recommend using some type of thread locker like Blue Loctite. The leaf spring bolt is usually a slight interference fit but over time and possibly having many adjustments it may not have the tightness that will give you confidence. If it comes out during operation there are many things that will be destroyed inside the pump itself. You do not have to turn them in or out very far to make a change in the amount of fuel that is delivered. Having a chat with a fuel pump shop technician may help determine how much you want to restrict the delivery volume.
@leviskuse3122
8 жыл бұрын
Okay thank you so much, I am going to locate a technician and ask him how much a quarter of a turn would affect the fuel. I will find that out all before hand. Finally, my last question, Do you believe I should be safe with adjusting the screw just one time and not have to worry about it coming apart while running? The screw was only adjusted one other time according to the seller, four or five years ago, and it has been ran a lot since.
@instructordave111
8 жыл бұрын
Hi Levi,I would check that with the technician as well. If it has not been used as many times as the ones that I had in the classroom it may be fine, but I won't promise you anythig lie that from this distance away. Good Luck with getting it where you need it.
@maricelbarete5676
10 жыл бұрын
plz email me
@no_dissasemble
4 жыл бұрын
PFM
@Robert164
5 жыл бұрын
Hey Ryan, go to bed
@catlady8324
4 жыл бұрын
It’s called the “DB-2” because D. B. Cooper invented it and it was his second design. Soon after, he successfully hijacked Flight 305 and parachuted from the Boeing 727 with $200,000. In 1971, $200,000 was a lot of money. He disappeared and, sadly, never realized the success of his now famous Injector Pump breakthrough.
@instructordave111
4 жыл бұрын
Good to know, I was not aware of this i formation. Thanks for the contribution.
@dave7830
2 жыл бұрын
If anyone believes that one, I have some land in Florida that NEVER gets flooded, and I can get you a great price on the Brooklyn Bridge if you have cash.
@catlady8324
2 жыл бұрын
@@dave7830 The Brooklyn Bridge shares is fake news. I know because I bought up the last of them several years ago.
@jacobclubb5624
6 жыл бұрын
Just got a 6.5 db2 pump, was wondering how it worked, theis video was amazing well done
@vn1500g3
7 жыл бұрын
Would a sticking delivery valve cause a white smoke condition across the RPM Range?
@instructordave111
5 жыл бұрын
Sorry Armand, I apologize for not seeing this. Yes a delivery valve that is sticking open or has debris on the seat would allow drops of fuel to enter the cylinder via the injector tip. It is there to provide a quick BOI and EOI and maintain a head pressure in the line, without it there would be some unatomized fuel drops getting by. Sorry once again for missing this question.
@martinw9425
5 жыл бұрын
i own a 1986 international navistar in a f350, that was very interesting ,thank you
@sweetpeaz61
9 жыл бұрын
Thankyou for a very informative video..i have learnt a lot and now understand why my pump isnt working..thanks again
@instructordave111
9 жыл бұрын
I'm glad it helped.
@yubaloliveras9232
4 жыл бұрын
you greatness is impossible to understate. I would like more information on the shut off solenoid and the different parts needed to move to turn the metering valve and the injection pump to ON.
@instructordave111
4 жыл бұрын
Thank you Yubal, The shutoff solenoid forces the metering valve to the NO fuel position when there is no electrical power applied to it. Once the ignition is turned on the solenoid is energized to create an electromagnet, which pulls in the stop lever and allows the metering valve to go to full fuel. The spring forces the linkages and levers inside to move the valve to full fuel. Once the engine is started the flyweights counteract the spring and cause the metering valve to adjust the fuel quantity to match the speed and load desired by the operator.
@instructordave111
4 жыл бұрын
This old video may also help kzitem.info/news/bejne/pXmGvXysa5x7jXo
@keato02
5 жыл бұрын
How high is the preassure going to the engine?
@instructordave111
5 жыл бұрын
That will depend on the speed the engine is turning. The injection pressure can be as low as 2000 psi at idle or slow speed and up to 25,000 psi at maximum engine speed.
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