oil pump
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Stellar HDF Member
Joined: May 2018
Posts: 2,171
Likes: 435
From: australia
Novice
Joined: Dec 2019
Posts: 23
Likes: 4
From: USA
Yes, go slow and take your time. It should't take much to clean the seat up. If it does it might have a scratch or something else to keep it from seating. It's worth a try and it worked great for me on a couple of different shovel heads.
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Stellar HDF Member
Joined: May 2018
Posts: 2,171
Likes: 435
From: australia
Cruiser
Joined: Sep 2019
Posts: 152
Likes: 50
From: Long Island
man, thanks for the late night laugh 
@OP
If ya use lapping compound on an installed pump, you'll be lapping your entire motor once ya run it! I guess that's a good way to increase the bore size by a few thou lmao.
@OP
If ya use lapping compound on an installed pump, you'll be lapping your entire motor once ya run it! I guess that's a good way to increase the bore size by a few thou lmao.
Last edited by TommyShovels; Dec 5, 2019 at 03:57 AM.
Grand HDF Member
Joined: Aug 2018
Posts: 4,126
Likes: 2,117
From: W. MI.
On my 81 FLT I tried the push rod lapping along with trying to seat a new bearing, both failed. Even a new spring. I put an S & S pump on it and forgot it. I thought it was the usual "sat too long issue", but no, pump was crap. Good luck.
Last edited by Bass Player; Dec 5, 2019 at 04:43 AM.
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Seasoned HDF Member
Joined: Jul 2014
Posts: 8,603
Likes: 3,374
From: Cental, MI
Yet my last S&S oil pump was much worse than the O.E. for Sumping... It is removed right now for "attention" that it should have received at S&S....
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,114
Likes: 7,638
From: Poolville
If it's just a tinkle, I'd leave it but if you're going to Lap the seat there's a lot of work into removing the oil pump to make sure it's clean before you put it back on and at that point I don't know if I just replace the pump or not.. Could be a lot of work for not..