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Farmall & IHC Tractors Discussion Forum
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460 farmall oil pump

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super_m

04-10-2007 14:12:51




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my 460 has a c-301 gas in it.the other day it had 40 lbs of oil pressure.the next morning i started it up and it showed no pressure at all,but it went up in the line about 12 inches.it used to go up in the line farther.i took the oil pump out,nothin was plugged up,the gears were tite,nothing seemed to be broke.put it back togehter with new oil and still the same thing.anyone know what it mite be?

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El Toro

04-10-2007 16:07:30




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 Re: 460 farmall oil pump in reply to super_m, 04-10-2007 14:12:51  
Did you prime the pump before reinstalling it? It should be placed in a clean container of engine oil and twist the drive gear until oil is being discharged, then reinstall the pump. Then start the engine and see if you have pressure.
Hal
PS: Don't run the engine any longer than necessary to see if you have oil pressure.



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Kale

04-10-2007 15:12:58




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 Re: 460 farmall oil pump in reply to super_m, 04-10-2007 14:12:51  
I have a 240 with a similar problem.
An old IH mechanic told me to take the pump out, hold my finger over the outlet hole, put the sump in a pan of solvent, oil, or some kind of liquid, and spin the pump over to build pressure. He said that sometimes where the cast aluminum cover that fits over the gears can warp & just a slight gap between the cast iron & the aluminum cover will cause a great pressure loss. The cast aluminum cover is still available but very expensive. He said that you can either take the cover to a machine shop & have it machined straight or use a large whetstone with a flat side surface & hone it down until it is true. I have yet to do this myself on my 240 but if I do I'll let you know.

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Jossette

04-10-2007 14:35:07




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 Re: 460 farmall oil pump in reply to super_m, 04-10-2007 14:12:51  
rods and mains???



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High Octane

04-10-2007 15:26:42




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 Re: 460 farmall oil pump in reply to Jossette, 04-10-2007 14:35:07  
Where is the pressure relief on these engines? Is it in the pump or the oil filter housing? I have a 6 cyl with a new rebuild that has a new pump too, and its about 35 full throttle, and about 15 at idle warmed up. El cheapo guage though,,,,



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