If you've ever rebuilt, re-geared, or fixed a pinion seal on a differential, you've likely monkeyed with a pinion crush sleeve. But do you know the purpose of the pinion crush sleeve?
Most people think it's to set the pre-load on the pinion bearings, but it does not. People are just repeating what they've been told by the automotive industry. And I don't believe the automotive industry is trying to mislead anyone, they are just trying to use terminology that gearheads will understand. A crush sleeve or spacer/shims is not needed to establish pinion bearing preload. You can set the preload without it even installed. The problem is that if you set the preload without it installed, there wont be enough backpressure on the pinion nut to keep it from loosening. So the crush sleeve is added to put back pressure on the outer bearing inner race, which puts pressure on the yoke, which puts pressure on the pinion nut.
The only thing that crush sleeve is doing is acting like a lock washer for your pinion nut. It's adding back pressure to your pinion nut so it wont back off, causing you to lose pinion bearing preload. But it does not create preload. It just helps maintain it by keeping the nut from backing off.
Негізгі бет Автокөліктер мен көлік құралдары Pinion Bearing Preload Isn't Created By A Crush Sleeve!
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