MG T-ABC

Hi all,

Anyone have the dimensions of the oil seal used in the modified Moss pinion cap (265-198)?
I need to pull the pinion assembly from the pumpkin to address a persistent drip at the joint between the pinion housing and the pumpkin. I might as well replace the oil seal while I'm at it and I'd like to have one available before I start taking things apart.

If you have the part number of the speedi-sleeve I'd love that as well.

Thanks,
Dave TC0524

Dave-
I do not have the number for you because I am using the original scroll seal cap. Someone will have it.

Could it be that your pinion bearings are worn, and the shaft is turning a bit out of round? That would cause the rubber to distort and not seal.

These TC pinion bearings have a history of being a maintenance issue. Most of the original scroll seal caps have had the scrolls wiped away by out of round rotation from worn bearings.

Dave,
I have a replacement seal for the Moss pinion cap. Box marked “CR seals” and “SKF” . The factory P/N on the box is 12364 and Moss P/N 120-110. There is also a note on the factory label saying “try speedi-sleeve P/N 99125 for Ind’l shafts 1.247-1.253.
It measures 1.760 OD and is .260 thick. ID of rubber lip is about 1.160. ID of rubber hard to measure with calipers, but that’s pretty close.
Hope this helps.
Rob Zucca
TC 5464

Thanks for the info. I have found that another number for the seal is National 471413. My setup is not leaking at the seal but at the joint between the pinion housing and the cap. It appears that a sealant was not used when I converted to tapered bearings some 20 years ago. Since I've got to take it apart to clean up and add sealant I intended to replace the seal "just because". I'll probably also add the speedi-sleeve because while I'm in there...

The National/Timken specs for the seal is 1.250 x 1.750 x .25

Dave TC0524

The drive flange boss is 1.25" diam, so that seal would be a very poor fit, unless a speedisleeve bumped it up to 1.75"

The boss gets scored, because grit gets drawn into the scroll (it is doing its best to keep the oil in - at least when going forwards - but also drags in dust & grit, which is what eventually does for the front bearing).

What I do on every diff. I rebuild, is modify the pinion cap with an extension piece which takes a double-lip seal. This is closer to the flange than the usually worn part of the boss. For very bad ones, I machine the diameter down to 31mm and use a metric seal. Speedisleeves are expensive! I also have new drive flanges: they are often a bit bent after all these years.

Roger
TC0978

Roger,

I should have been more specific but my local bearing house refers to SAE/inch seals by shaft dimension, outer seal dimension and thickness. So the seal is ID = 1.250", OD = 1.752" and Width = .25". That would be one hefty speedisleeve!
Are metric seals referred to in a different order?

Dave TC0524