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Ford 9N, 2N & 8N Discussion Forum
Show Parts for Model:

Re: 9N oil pump bushing

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Author  [Modern View]
TheOldHokie

02-02-2013 02:43:00
74.110.76.253



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Duallie said: (quoted from post at 23:40:08 02/01/13) I'm nearing the end of the cleaning/painting stage
and about to begin assembly of my 1941 9N (12volt,
front dizzy, 9/16 oilpump).
I just had my machinist replace and ream the oil
pump bushing, but three teeth of the new pump gear
hit the housing. We assumed the body moved while
in the mill and we reamed it crooked. Went to get
an oilite brass bushing to try it again, and the
bearing shop owner glances at the original "Ford"-

labelled bushing and mentions that it looks like
the original bushing had more copper and therefore
is harder than the bushing he just sold us.
My first question is: What is the exact dimension
between the two pump shafts?
Number two: Why can't we press in some 5/8" OD
copper tube, drill an oil hole, and ream to fit?

Thanks for the help


I have a few observations:
  1. Conventional Oilite (SAE 841) bearings are sintered bronze with the addition of a small amount of iron and harder than plain copper. Super Oilite (SAE 863) contains more iron and is even harder.
  2. The bag of replacement oil pump bushings I have in the shop (high quality Noname brand) do not appear to be Oilite. They are split sleeve bearings and look to be ordinary rolled brass/bronze sheet.
  3. And the $50 question is why do only 3 of the gear teeth hit the housing. If your reamed hole is off center or out of square all of the teeth should hit the housing. Sounds more like the gear is cocked on the shaft or the shaft is bent. Might want to install the shaft in the bushing and check for runout in the shaft before you press the gear on.
TOH
This post was edited by TheOldHokie at 03:13:17 02/02/13 7 times.

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