random seal, I don't know where it goes

Hi and good morning.
still working on the 1971 R75/5 bike

I have to take responsibility for my lapse in organization
a lot of the parts I've ordered over the last 4 years have gone into a box... not always labeled, as the shipper will sometime throw multiple items into an unlabeled bag
that is my fault for not sorting them as they arrived....

but I've been going through the parts box and most things have been fairly easy to identify

however... i've got myself stuck on this seal
I thought it might be the swing arm... nope...
I thought a wheel bearing... nope...


possibly I have a part that was an accidental shipment and doesn't fit my bike?
maybe a different year bike...

its a thin seal
measures out at 40mm x 21mm x 7mm



any one know what this should fit...
I put all new bearings into every single rotating point and this is extra...
but definitely came from Bob's or Max in one of my orders for the bike.

Looks like it might be for the swingarm, if you are using the original bearings and sleeves.

MAX shows the swing arm seal to be: "Seal ring 22x40x10 for swing arm bearing"
The next nearest seal appears to be for the front wheel bearing at: # 36 31 1 233 247 SHAFT SEAL - 36X22X8

r1200rst said:

MAX shows the swing arm seal to be: "Seal ring 22x40x10 for swing arm bearing"

Click to expand...

I think it must be that.. a different supplier maybe..

weird...
but I pulled a swing arm seal
its identical except in thickness
mine is more narrow.

and it is identical so.. my measurements should have been 22 x 40 x my narrow number

thanks again everyone

brant

Would the thickness of the seal make any difference? It just needs to fill the hole and seal around the inner diameter. Those seals are usually driven in until it is flush with the bike engine/frame anyway.

It's a grease seal, not an oil seal, and there are only a few places (wheels and swingarm) where grease seals are used.

The swingarm seal runs against the same part that the wheel seals ride against, which is 22mm. And the wheel seals I have here are a hair over 21mm ID so that they stretch slightly over what's in them.

Oh, and here we go I just found some swingarm seals. They are about 21mm ID, unstretched. These are 10mm thick but I bet there are 7mm seals that were easier for someone to buy/supply at one point.