290 DP bearing carrier replacement-gctid817226

[welshswampy]

Following on from my previous thread, I made the puller tool from the vault (thanks Rick) and it worked a treat

No heat required which surprised me

I've tried to include a diagram to explain my question, but don't know if it has worked

My damaged bearing carrier has C20 stamped on it, my replacement has C22

Does this mean more shimming required or less, there were 2 shims (part 28) behind the cup (part 27) of differing values

I couldn't see anything on the shims to determine their size, but I can measure them tomorrow

I have a seal kit which consists of the 2 large "O" rings for the carrier (part 31?), 2 large oil seals for outer shaft (part 37), 2 smaller seals for inner shaft (part 40), 2 "O"rings which look like they will fit the drain plug and dip stick (part 24), 1 "O" ring which is slightly larger in diameter than the plug/dipstick ones and a 3/4 " fibre washer

I don't know what the last 2 are for, any takers?

My main question is regarding the shimming of the cup, is it a case of reassemble without any shims at all and go from there?

Do I need to shim anywhere else?

I have bought new German made needle bearings (part 35) but removed the existing cup and plan to reuse it (it isn't damaged/marked at all)


Attached files

[welshswampy]

Just to add

1 from which end does the needle bearing get fitted into the carrier as it isn't tapered

2 is shimming required anywhere else apart from the cup of the timken bearing

3 what else have I missed

Thanks

Nick

[2850Bounty]

Have a good and well experienced machinist help you.

Remove the bearing race from the existing carrier.

Once he sees what you are doing, he'll understand just how to assess the differences between the old and replacement carrier.

He will do the math, and will be able to make the changes to the shimming value.

This image should show you where the needle cage is positioned.

Please note in your instructions how the two back-to-back seals install.

Pay no attention to the notations in this image..... I put this together for a member who was considering repairing a bearing carrier.



Y surface will be a constant between the two carriers.

Dimension Y to X will vary between each carrier.

This is where you will do the math, which will lead you to the shim value difference.


Attached files

[welshswampy]

Thanks, I have a friend who has an engineering factory (who I'm probably running out of favours from) and one of his guys is a knowledgeable sort

So I can re use the existing race and shims once the new carrier is machined to the same specs as the old one?

What is the easiest way to fit the needle bearings?