Anyone know what seal this is?

baz · 2026-09-05T16:34:21-0600

It's a crank seal conversion on a pre unit triumph timing cover
I'd like to know what seal it is so I can replace it
It's metal housing with a seal inside
No circlip to retain it

wildbill56 · 2026-09-05T18:25:19-0600

any manuf numbers visible? you might be able to track it down....might be on the OD of the metal portion. Good luck!

concours · 2026-09-05T20:16:16-0600

Why, it's an RTB1800, of course..

NORTSTER1974 · 2026-09-05T23:24:40-0600

Bob's your uncle, looks like he has the part # right. Just contact someone who knows what they are selling.

Grandad · 2026-09-06T00:56:32-0600

Measure the I/D of the casting and the O/D of the shaft portion plus seal thickness and you'll get what you need.
Pretty sure if you get a more modern seal type ( TC rather than TB ) you'll get a rubber seal with twin lip instead of metal clad with single lip.

Triton Thrasher · 2026-09-06T01:17:45-0600

Ae you replacing it for a reason?

baz · 2026-09-06T02:53:59-0600

Triton Thrasher said:
Ae you replacing it for a reason?

Not yet
But incase I do I'd to know what it is and where I can get one

baz · 2026-09-06T02:57:37-0600

concours said:
Why, it's an RTB1800, of course..

What are they used on? Where can I get one if needed?
I've seen plenty of oil seal conversions on pre unit triumphs but never this type
And they are usually retained with a circlip

Fast Eddie · 2026-09-06T03:19:06-0600

Is it not simply a stock unit construction type seal?

Triton Thrasher · 2026-09-06T03:19:24-0600

baz said:
What are they used on? Where can I get one if needed?
I've seen plenty of oil seal conversions on pre unit triumphs but never this type
And they are usually retained with a circlip

I’ve got the usual black seal held by a circlip conversion on my own T110. Maybe the metal case on your seal is tight enough unclipped, but who knows…

I some people will only use Pioneer Weston brand seals in that application. Supposed to be less prone to invert under pressure.

Anyone know what seal this is?

baz

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