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002 gearbox diff bearing preload
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Kiwi1966
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Joined: August 18, 2009
Posts: 168
Location: Ohoka New Zealand
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PostPosted: Sun Mar 24, 2019 1:57 am    Post subject: 002 gearbox diff bearing preload Reply with quote

Hi
Have my 69 westy box torn down due to a worn pinion bearing and main shaft bearing. Have been doing research on setting the diff bearing preload ( I marked side adjusters before stripdown ,new diff bearings fitted as well ) and it looks like most experienced builders do it by feel, but apparently it normally equates to the side adjustor being turned 1 to 1.25 inches after zeroing the bearings. My question is ---- are both side adjusters turned in 1 to 1.25 inches after zeroing the bearings or only one side 1 to 1.25 inches after the zero of the bearings.Want to get the preload in the ball park before I temp install pinion shaft and reset the adjusters for the correct backlash and then check gear contact to make sure the pinion depth has not changed due to the new bearing
Thanks Ross

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Casting Timmy
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Joined: August 04, 2012
Posts: 1221
Location: Kansas City, Kansas
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PostPosted: Sun Mar 24, 2019 4:22 am    Post subject: Re: 002 gearbox diff bearing preload Reply with quote

Just one needs to be turned that far.

Personally when running the patterns I would leave it where the races just touched the bearings. The diff is easier to turn and see the pattern. I would measure backlash and then confirm/ adjust with running a grease pattern. Once I was happen I would measure again and then do half your total preload to each side and either run the pattern or measure backlash to make sure it stayed where I wanted it too.

If it's the same diff, diff bearings, ring gear you can put it back to your marks.
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