Oil Pump Restoration

Superchicken · Post by **Superchicken** » Sat Jul 12, 2014 10:01 am

Gman, you take to another level. Thanks for reporting on it too, I read your shock rebuild process, and now I can see the way to make the simple tools for doing the job.

G-Man · Post by **G-Man** » Sat Jul 12, 2014 10:52 am

Superchicken

Glad you enjoyed the read. It's madness really but I just love tinkering with these old things.

The tools for the shocks are very handy and save a lot of time and skinned knuckles.

G

Superchicken · Post by **Superchicken** » Sat Jul 12, 2014 11:52 am

G , I have the ambition to tinker, my latest project is removing the aluminum and replacing dry-rot frame and paneling on our 56' Shasta tin can trailer, putting back together with original paint. I also replace the rubber window edges. I also have two CB77projects, a 1970 OSSA 250 SPORT and a Yankee z 500 1973, a 1970 OSSA 250 Plonker, green and yellow All my spanish stuff has orig paint. The shasta is the the only finished one.

G-Man · Post by **G-Man** » Sat Jul 12, 2014 11:59 am

SC

It sounds like you have plenty to keep you busy. Never had an Ossa but admire them very much. I remember the 250 road racer that Santiago Herrero raced in the 70s. The Yankee twin must be an impressive ride. I saw one a couple of years back in the Barber museum. Very nice.

G

Superchicken · Post by **Superchicken** » Sat Jul 12, 2014 12:15 pm

G if you go to ossaengerring.com they have full write up on my 250 Sport winning 24hr race OVER ALL. Also full write up an pictures of the Santiago bike

conbs · Post by **conbs** » Mon Jul 14, 2014 11:14 am

G,

Under that mild demeanor you are really be more like a mad scientist. Very interesting experiment.

When I thought about how to save an oil pump I wondered if a guy couldn't just take an end mill the same size as the original bore in the case for the gears. Clean up the scoring. Mill the whole surface of the cover plate as needed. Then buy gear stock the same diameter as the original gears and cut wider gears. Perhaps a little milling of the oil passage ways but, they might be alright as is.

What say you? It probably could not be made economical but, it would seem to be more simple and give a little more oil flow.

IIRC Jensen performed a similar operation but put two gears in place of one. Seems like he had some kind of binding issues or something.

conbs · Post by **conbs** » Mon Jul 14, 2014 11:49 am

G,

Under that mild demeanor you are really be more like a mad scientist. Very interesting experiment.

When I thought about how to save an oil pump I wondered if a guy couldn't just take an end mill the same size as the original bore in the case for the gears. Clean up the scoring. Mill the whole surface of the cover plate as needed. Then buy gear stock the same diameter as the original gears and cut wider gears. Perhaps a little milling of the oil passage ways but, they might be alright as is.

What say you? It probably could not be made economical but, it would seem to be more simple and give a little more oil flow.

IIRC Jensen performed a similar operation but put two gears in place of one. Seems like he had some kind of binding issues or something.

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