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Discussion Forum

Allis Chalmers oil pump

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02-06-2003 20:32:16

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Took my A/C apart. Rebuilt most over winter. Now no oil pressure. Any ideas on how to prime the oil pump? the pump discharge sticks up from the housing behind the block. The engine is a 149 cubic inch 4 cylinder gas

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02-06-2003 22:07:29

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 Re: Allis Chalmers oil pump in reply to jon, 02-06-2003 20:32:16  
Take the oil line off that goes from the back of the block to the oil filter housing and useing a squirt oil can pump oil into the block fitting connect the line back up and start the engine oil presure should come up very shortly.

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02-07-2003 15:37:50

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 Re: Re: Allis Chalmers oil pump in reply to david, 02-06-2003 22:07:29  
after priming and starting, if still no pressure, crack the line or remove the oil filter and crank the motor. do you see any oil flow? 75% of the oil is routed down the center of the cam shaft an splashes on the bearing inside. about 15% goes thru the pipe to the filter and is cleaned and dumped back to sump. the gauge measures the oil at the filter, not in the motor. if the center "tube" in the filter housing is missing, you will read no pressure.

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