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oil pump overhaul

(quoted from post at 00:00:01 04/17/17) Are the kit and a 9/16 reamer the only things I need to overhaul an 8N oil pump?
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o one can honestly answer that question without a thorough/knowledgeable examination. What if bushings & shaft so worn that gears have gouged the housing?
 

If you are gunna do it yourself buy a insurance plan. Its cheap and consist of a few extra bushings :D My machine shop charges $15 to hone them out in his rod recondition machine they have always been dead nuttz... I will admit I have not had good luck with the tool and its mostly ME the operator...

Dan known as Rust Bucket Dan had a good write up on how to use the tool. This is not a place to experiment if you go there buy a insurance plan. TOH plan is a good investment also.

http://www.yesterdaystractors.com/cgi-bin/viewit.cgi?bd=nboard&th=649231
 
(quoted from post at 07:59:13 04/17/17)
If you are gunna do it yourself buy a insurance plan. Its cheap and consist of a few extra bushings :D
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Now that is good advice from a man who has been there ;-)

I would also add that if I were already planning on paying to have the mains realigned I would never install a pump (new or old) with 9/16" gears....

TOH
 
Really good explanation, Hokie! Thanks very much. My 8N has low oil pressure when hot, so I'm going to have to do this sometime. Sure hope I can rebuild the old oil pump and don't have to align bore the block.
 
(quoted from post at 10:57:01 04/17/17) Really good explanation, Hokie! Thanks very much. My 8N has low oil pressure when hot, so I'm going to have to do this sometime. Sure hope I can rebuild the old oil pump and don't have to align bore the block.
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The number one cause of low oil pressure is probably worn bearings with the oil pump coming in a very distant second.....

TOH
 
Well that's cured, I just picked up my crank from the machine shop, rods at .020 and mains at .010. Rods are resized with new bushings. I just figured as long as I was here I would get new gears and a bushing for the pump. I can do that on my milling machine I just set it up flat and parallel at X and Y and run the reamer through it.
 
I just checked mine and both pumps have the 3/4 gears and look to be in good shape no hitting the housing, no cutting into the cover and the pump gear feels snug and wont wobble. I think I am gonna leave it alone.
 
(quoted from post at 02:12:40 04/18/17) Well that's cured, I just picked up my crank from the machine shop, rods at .020 and mains at .010. Rods are resized with new bushings. I just figured as long as I was here I would get new gears and a bushing for the pump. I can do that on my milling machine I just set it up flat and parallel at X and Y and run the reamer through it.
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Cool... Other than the pick up tube are were it mounts to the oil pump the other overlooked place oil pressure could be affected is the cam journals.

I have overlooked the pick up tube to the pump clearance issue its been discussed here if I can find the link... It has not been that long ago it was a winner post...
 
(quoted from post at 20:41:38 04/17/17) Why not?
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For the same reason Ford made the change. The smaller displacement pump lacked the volume needed to keep up with even a mildly worn engine and low oil pressure was/is a chronic complaint.

TOH
 
(quoted from post at 23:32:39 04/17/17)

For the same reason Ford made the change.
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i think the same way when someone questions my non-show tractor 12 volt conversion :)
 
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