The Cat 619 scraper: an overview by Richard Campbell
First of the Caterpillar 600 series motorscrapers, the model 619, was first introduced in 1959. It was originally called the DW16 and was intended as a replacement for the obsolescent DW15.
The initial model offered to contractors was the 619 series B and matching No.442B cable-operated scraper, with a 14 cubic yard struck and 18 cubic yards heaped capacity. An optional 17 cubic yard rear dump, known as the PR619, was also produced for the machine.
Cable control was via the rugged and dependable No.27 two drum PCU.
Powering the 619B was a Cat D337T six-cylinder turbocharged diesel (the same engine as used in the DW20 and DW21), rated at 225 horsepower.
The machine was offered with either gasoline starting engine or direct electric start, and a six speed constant mesh transmission with double plate 16” clutch was standard equipment.
Riding on 26.5 x 25 tyres, the 20.5 ton 619B was capable of a handy 30 miles an hour.
Produced for only one year, the 619B was plagued with a few problems, including engine difficulties, weight issues and a bowl considered by operators to be hard loading.
So in 1960 the new model 619C was released.
This featured a number of improvements and modifications, most significant of which was an entirely new engine.
Caterpillar chose the new model D340 four-cylinder, 250 horsepower, turbocharged diesel for the 619C and at the same time introduced an optional 9-speed powershift transmission to go with it. The constant mesh transmission was still offered for those contractors who preferred direct drive but with the added bonus of an air boosted clutch to make the operator’s life a little easier.
A foot operated differential lock to reduce wheel spinning was also added.
Both gasoline starting engine and direct electric start were still available options.
It is interesting to note that the D340 engine was not used in any other Caterpillar earthmover then or since.
To try and remedy the loading complaints, a supposedly redesigned low-bowl No.619 cable-operated scraper replaced the former 619B’s No.442, but capacity remained exactly the same at 14 yards struck and 18 yards heaped.
Having studied the two scraper bowls at length, the author cannot discern anything other than minor differences between the No.442 and No.619 scrapers, leading one to wonder just exactly what was altered.
Thanks for checking out NZ Contractor magazine's Caterpillar 619 clip.
These clips are made from images published in conjunction with classic machines reviews at www.contractorm...
Captions and associated images have all been uploaded to Pinterest / contractormag
Author Richard Campbell has sourced these images; Richard also blogs at www.contrafedup...
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