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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #11  
Old 24th April 2020
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It can be done without coming completely out of the frame , but it takes 3 guys and it really helps if the heads are off.

From your description I suspect a sheared drive pin in the feed side of the pump.

It has nothing to do with the check ball. Do not modify the check ball spring EVER.

It's not a car oil pump ,that is not a bypass , you will not raise the oil pressure by

stretching that spring only starve the engine of oil.
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  #12  
Old 27th April 2020
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Quote:
Originally Posted by doodah man View Post
Check valve! Ball valve is something else - plumbing stuff.
noted this, thx

Quote:
Originally Posted by bustert View Post
engine mounts removed, the engine can tilt enough to clear the pump without pulling engine but if you do, now's the time to mod the frame. there are several ways and many here have done so, self included.
there are a couple of other things that can be done but NOT for the faint of heart.
I see. Will check for more of this, I 've hear people creating cut off, will check for best practice. But if you could point out good resource, links, site, that will help. thx

Quote:
Originally Posted by mrmom9r View Post
It can be done without coming completely out of the frame , but it takes 3 guys and it really helps if the heads are off.

From your description I suspect a sheared drive pin in the feed side of the pump.

It has nothing to do with the check ball. Do not modify the check ball spring EVER.

It's not a car oil pump ,that is not a bypass , you will not raise the oil pressure by

stretching that spring only starve the engine of oil.
luckily it is not that sheared drive pin. I primed the oil, bled off the air from the system. whew... I was thinking worse..
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