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Farmall & IHC Tractors Discussion Forum
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International 1486 hydraulic pump problems

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agrivest

11-06-2007 10:47:20




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I have a International 1486 tractor. It has hydraulic pressure problems. Pump pressures for 3 point hitch and valves become so high that it twists the shaft of the hydraulic pumps. I have already worked on MCV valve and rebuilt. New pumps run for 3-7 hrs before pump drive shaft twists off. Any experice with this?




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ChrisAS

11-06-2007 11:21:32




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 Re: International 1486 hydraulic pump problems in reply to agrivest, 11-06-2007 10:47:20  
agrivest The 1486 can have 1 of 2 kinds of pumps the early ones have gear pump the late have a piston pump. I only have experence with the gear type. The tractors with gear pump have 2 pumps one for MCV and one for remote and 3 PT hitch, make sure that the pto is not turnning to fast,maybe the wrong pto drive shaft off the clutch.If you are having trouble with pumps. I would first check the pump drive gear fit to the gear on the pto drive shaft the drives the pumps. Some tractors have a shim gasket between pump mout plate and the housing thet bolt to.Get a gauge to check remote pressure, because the 1486 would be around 2250 psi. Hard to believe both pump reliefs that high.

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MIKE FRENCH

11-06-2007 11:03:33




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 Re: International 1486 hydraulic pump problems in reply to agrivest, 11-06-2007 10:47:20  
What style pump do you have, gear or pph style? Sounds like a preasure relief valve problem.



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