Renault Pont Avant 569 - palier / bearing

[andrazzz]

Hello!

My front differential (PA 569) has a worn pinion bearing. Most probably because the front drive shaft was out of balance for too many kilometers.
When I rotate the flange by hand, it doesn't run smoothly. I guess the outer pinion bearing should be replaced soon.

Does anyone have any information or experience with the replacement?

Cheers

[def130]

Hurth Axel ?

[HiddenTTY]

It's not a Hurth axle but a Renault 569 diff housing.

Hi andrazzz, this is called a 569.10 cause it's a front axle, but it's based on the 569.01 or 02 diff central housing that common to rear's Renault B and Mascott axles. Hopfully the overall mecanics interventions are well documented but require special tools and very high precise operations.
Somes information and docs are available here : viewtopic.php?p=216264#p216264

Personaly i've gone throught the complete swap of a diff gear on à 569.39 that's quite the same except for the crown bearing payload that use a nut instead of shim like yours. More information here : viewtopic.php?t=18770

You have to reefer to this paper about the bearing dimensions :




Operations are documented here : http://bastien59.free.fr/mecanique/Pont ... %20-10.pdf Start at page 20.

[andrazzz]

Hello!

It's Renault axle, yes.

Thanks a lot for the info. Very useful.

Currently the van is in Kyrgyzstan and I'm at home (Slovenia) - I'd like to equip myself (as much as I can) with instructions, manuals and spare parts before I head back to KG in spring.

Cheers, Andraz

[HiddenTTY]

Are you familiar with metrology tools and process like with comparator ?
Usually when you already have play and misalignement in one of the pinion gear bearing the second is probably wasted too.

The problem with that is that if you need to change the two bearings you have to make sure to adjust the bearings preload, the pinion-crown distance and the teeth backlash, only with rectified shim. It can be a loooong work, take multiple assembly try before find the right setup. And if you just mess it or get bored to tune it properly your hypoid gear will just insanely be weared in no time.

If any doubt, it could be wise to ask to a professional machinist to perform the operation.

[def130]

We all rebuild the axels from the LT ( hurth) and upgrade the system it is. Life time it is a job where you need do know what have to be done.

[andrazzz]

Thanks for the informations and warnings.
I have no particular experience with the job, but most probably I would do it at home (even though it's out of my comfort zone). I'm sure I would need days or weeks. But almost anything is fixable if you have time.
I definitely won't do it there without someone who has experience with that. And I know it will take time - I plan few days.
I'd just like to prepare as much as possible - with knowledge, spare parts and tools - to minimize the surprises

[andrazzz]

Hi again!

Does anyone know where can I get all the parts needed - bearings, shims, seal,...?

Renault Trucks Slovenia is useless. They say the parts are not available.

Cheers, Andraz