Oil Pump guts

russb wa · Oct 2, 2016

There are two versions, early is 9/16" gear length Later is 3/4" gear length.

Are there other differences, gear or shaft diameter? Cause, if not I may try making a spacer of something suitable, Aluminum or Steel. To push a little more oil.

I have modest machining facilities. Definitely enough to make a spacer an maybe some mods to pump body/end cap.

TheOldHokie · Oct 3, 2016

(quoted from post at 22:10:37 10/02/16) There are two versions, early is 9/16" gear length Later is 3/4" gear length.

Are there other differences, gear or shaft diameter? Cause, if not I may try making a spacer of something suitable, Aluminum or Steel. To push a little more oil.

I have modest machining facilities. Definitely enough to make a spacer an maybe some mods to pump body/end cap.

That is going to change the position of the oil pump pickup. I think you will find it much easier to simply put the newer pump on the tractor.

TOH

Charles Krammin · Oct 3, 2016

My overhaul guy said gears were binding so He added extra gaskets. Suspect He put wider gears in. Hasn't blown out yet in 4 years, but still watching gauge. Didn't improve pressure.
Charles Krammin

TheOldHokie · Oct 3, 2016

(quoted from post at 08:17:10 10/03/16) My overhaul guy said gears were binding so He added extra gaskets. Suspect He put wider gears in. Hasn't blown out yet in 4 years, but still watching gauge. Didn't improve pressure.
Charles Krammin

9/16 = .5625. 3/4 = .7500. That would be a [b:428dd7ce7e]LOT[/b:428dd7ce7e] of gaskets. You never know but getting it fixed right might have actually helped the pressure....

TOH

russb wa · Oct 3, 2016

I think maybe the gasket(s) give the gears a little more clearance than the housing, not sure. That is why I was thinking of boring a piece of metal. Maybe soft aluminum would suffice as a gasket, dual purpose.

russb wa · Oct 3, 2016

"That is going to change the position of the oil pump pickup."

Humm, not sure. I was thinking it would just extend the cap end.

I have had problems for years. There was a galled, raised bur in the cap. I will have to deal with when I get in there.

The pump was loosing it's prime. You set me to priming the pump years ago. Probably saved the crank shaft.

Oh, I was using Mobile one for a while and it was the worst for loosing prime. Now using the cheap 10-40 from Walley's and it holds for a good week.

TheOldHokie · Oct 3, 2016

(quoted from post at 11:01:09 10/03/16) "That is going to change the position of the oil pump pickup."

Humm, not sure. I was thinking it would just extend the cap end.

I have had problems for years. There was a galled, raised bur in the cap. I will have to deal with when I get in there.

The pump was loosing it's prime. You set me to priming the pump years ago. Probably saved the crank shaft.

Oh, I was using Mobile one for a while and it was the worst for loosing prime. Now using the cheap 10-40 from Walley's and it holds for a good week.

I think you have me confused with someone else. I don't recommend repeatedly priming the pumps - I recommend fixing the problem. In your case I think it is time for a new pump. Better that than a whole new engine....

TOH

Oil Pump guts

russb wa

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TheOldHokie

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Charles Krammin

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TheOldHokie

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russb wa

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russb wa

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TheOldHokie

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