oil pump drive gear shaft bushing

Bottom End (crankcases and crankshaft)
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socalrider
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oil pump drive gear shaft bushing

#1

Post by socalrider » Mon Apr 29, 2013 9:34 pm

how are these changed out? what special tools are required? i looked all over the knowledge base could'nt find anything.
gracias,
arnulfo



Cotten
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Re: oil pump drive gear shaft bushing

#2

Post by Cotten » Mon Apr 29, 2013 9:50 pm

Arnulfo!

Few are ever replaced unless damaged.
Their long length makes them long lived.

Can you feel excessive play upon a fresh shaft within it?

The tooling resembles many other bushing replacements:
A puller and a pusher, a reamer and a hone, measuring instruments, patience,... and carefull observation.

....Cotten

socalrider
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Re: oil pump drive gear shaft bushing

#3

Post by socalrider » Wed May 01, 2013 8:32 pm

Cotton, waiting on a new one to arrive to check fittment . Old one seemed to have excessive spop in the bore.will let you know how new one fits when i get.
Gracias
Arnulfo

socalrider
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Re: oil pump drive gear shaft bushing

#4

Post by socalrider » Wed May 01, 2013 9:56 pm

Got the new shaft in and it does feel kind of loose. I took measurments of the bore using a telescoping type bore gage and a mitutoyo 0-1" inside micrometer. The bore measured out to .425" and the shaft measures out to .422". So that put the bore .003" bigger than the shaft. Harley manual specs call for a tolerance of .0005" to .0012". So i guess im way over the loose side of the specs, .0018" over loose side.
I really dont want to mess with that bushing because 1) i dont have the proper tools for it 2) thats a machined surface and i dont want to screw it up fighting a bushing that may not come out so easy. So i think i will leave it alone and see what kind of flow i get. Wish me luck men!
Arnulfo

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Re: oil pump drive gear shaft bushing

#5

Post by Cotten » Wed May 01, 2013 10:34 pm

I confess I have never replaced one, Arnulfo,

But the puller and pusher for the job would be time-consumeing to fabricate.

And multitudes have been successfully put back into service at similar wear, I'm certain.
Perhaps endplay between the installed gears is more important, but basically, it is truely a bullet-proof design.

Can't believe they never "updated" to a bearing.

....Cotten

socalrider
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Re: oil pump drive gear shaft bushing

#6

Post by socalrider » Thu May 02, 2013 3:51 pm

Many thanks cotton !
Arnulfo

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