Oil going up

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Oil going up

Postby moe1942 » Fri Apr 08, 2005 7:52 am

My crankcase oil is increasing and TC fluid is going down so I know what the problem is. I have used the search function but don't find the answer to the following question.

Are the gaskets and seals the same for all cubs or were there changes in later years?

thanks
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Postby Jim Becker » Fri Apr 08, 2005 9:36 am

The earliest pumps used a shaft seal. Later ones used an o-ring. The other gaskets and seals remained the same.
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Postby moe1942 » Fri Apr 08, 2005 12:57 pm

Thanks for the reply Jim. Was beginning to think I was invisible. :)

Guess I'll wait until I pull the puimp to see which one I have, unless you know which was used on the 69.

Thanks again..
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Postby Donny M » Fri Apr 08, 2005 3:03 pm

"O" ring in 69. 8)
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Postby Jim Becker » Fri Apr 08, 2005 3:47 pm

Like Donny said, a '69 should have an o-ring. You can make sure you have the original type without removing it. Look for a part number stamped into the pump housing. If it is 352035R91, it has the seal. R9<anything else> will be the o-ring.
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Postby Jim Becker » Sat Apr 09, 2005 8:40 am

Who knows why that sort of thing might happen. Rebuilders frequently do things to obliterate original markings of units. If you can't tell what something was, you aren't going to be able to question whether it is the correct part or not. Sames them the touble of doing things right.

If you take an R4 pump in for a rebuild and get back an R2 pump you might complain. If you get back a P-15A and his book says P-15A replaces an R4 what can you say?
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Postby moe1942 » Sat Apr 09, 2005 11:18 am

Thanks for the info.

Was really hoping it had a seal in case the shaft is buggered.

Any fixes or advice in case the shaft is worn??
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Postby moe1942 » Sun Apr 10, 2005 8:57 am

Thanks to all who replied.


Cubguy47, I have a lathe. Is that what you used to dress up the shaft? Was the shaft hardened and if so did you use a carbide tool or toolpost grinder?

Also, has anyone used a seal in place of the O-ring. I have a milling machine and it would be easy to enlarge the pump cover to accept a seal.

Any advice on doing that would be helpful.
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