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4400 3pt. hydraulic pump noise.

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C.W

03-12-2002 20:21:56




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I have a hydraulic pump on my 1965 4400 that sounds like it's grinding rocks.This pump has the wobble plate in it that runs the piston.When I shut the tractor off and restart in a few minutes it doesn't make the noise for about 15 seconds,then starts again.3 pt lifts fine,but I don't use it.Level in rear end is fine.Would my filters be getting plugged?Are these hard to replace?Or has my pump had it?Looks like a bear to get out with my loader on.Thanks.

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TomG

03-13-2002 02:20:37




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 Re: 4400 3pt. hydraulic pump noise. in reply to C.W, 03-12-2002 20:21:56  
Might be oil cavitation in the pump. An obstructed suction line, including clogged filters/screens can cause cavitation. Cavitation often produces overheated frothy oil after a period of use and can damage a pump.



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