Reference: C8A HUP grease seals

[David Herbert]

Is it possible that these seals are metric ? 78mm OD and 38mm ID ?

David

[Malcolm Towrie]

Good suggestion, Dave. I searched for those dimensions but didn't find anything exact, although I got closer than I did with the imperial sizes, 35x78. This size gives an extra 1/16" per side compression on the seal lip which is a lot, but considering the relatively low speed and the extremely low usage, it might work.
Malcolm

[Bob Carriere]

Your best bet is to take the old seals,bearings etc and visit a General Bearing services....aka GBS..... they will measure the parts accurately and search world wide for the item....... one seal inside the front axle could not be found with the proper ID and OD...so we bought the one with the good ID size and had a machine shop turn an adapter in aluminum to fill the gap between the axle tube and the seals...... once pinned in place they never leaked....

They search by size and not necessarily by part number....typically they will find 2 or 3 sources for often great variation in price and various location.... you pick the cheapest for shipping.

Good Luck.

Bob C

[Malcolm Towrie]

Thanks for the response, Bob. I find the SKF/Chigaco Rawhide web site search below the best out there. I figure they make most of the seal sizes worldwide!

https://www.skfextranet.com/crsealsf...35X78X8+CRW1+R

And, yes, I recently went through the exercise of buying oil seals for a Centurion gearbox and final drive. Like you say, our supplier couldn't get the sizes needed because the seal dimensions made 70 years ago are not available today, so we ended up buying the right shaft size and machining spacers to adapt the seal ODs to the housing bores. Looks like we'll be doing the same for some of these HUP seals.
Malcolm