Has anyone on here changed a clutch oil seal with the engine in situ. ? 1960 850 .
Dont really want to remove engine if possible

Pulling the primary gear out is unnecessary to simply change a seal, and can often damage the transfer housing as not all housings are machined all the way through. They often have a lip on the inside that the primary gear gets caught on and your little home made puller ends up breaking the case.Spider wrote: ↑Thu Jun 03, 2021 9:07 pm I made my own Primary Gear Puller about 35 odd years ago. Pulling the Primary Gear will also take the Oil Seal out with out without risk of scoring the housing (after which, it will forever leak), so I'd suggest being careful just how the seal is removed. I wouldn't recommend screwing in self tappers or using screw drivers etc.
Sorry, I don't have a file photo of it on this PC, but it's not a complicated tool to make, needing only a hole saw, angle grinder and welder to make one.
I'll put up a pic when I get in the office.
In regards to seals, I've found the Mini Spares own types to be quite good. The Payen ones can be hit and miss, and while the Black MPI types seal better, they also wear the Primary Gear.
<Edit:- Primary Gear Puller. This uses the plug from the Flywheel Puller in the end of the Crank to press against.
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how did you do it in the end? (got this job coming up ...)