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Allis Chalmers C Hydraulic pump
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John426 View Drop Down
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Joined: 14 Aug 2012
Location: France
Points: 277 		Post Options Post Options   Thanks (0) Thanks(0)   Quote John426 Quote  Post ReplyReply Direct Link To This Post Topic: Allis Chalmers C Hydraulic pump
    Posted: 4 hours 25 minutes ago at 1:02am
Hi

The manuel says thaht the hydraulic pump pressure is 3200 lbs ( 220 bars) ; It seems a little bit high.

On mine with the pressure gauge i have 1740 lbs ( 120 bars) at iddle and 2030 lbs ( 140 bars) at high engine rpm.

Do you have the real pressure take with a pressure gauge on the tractor?
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DiyDave View Drop Down
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 51354 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DiyDave Quote  Post ReplyReply Direct Link To This Post Posted: 52 minutes ago at 4:35am
May seem high, but that's what it is supposed to be.  Early AC systems were high pressure, low volume(4 GPM).  Sounds like yours is wore out...
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Gary View Drop Down
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Joined: 13 Sep 2009
Location: Peterborough,On
Points: 5316 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Gary Quote  Post ReplyReply Direct Link To This Post Posted: 20 minutes ago at 5:07am

Dave has got it right. Pump Overhaul in the Allis Service Manual for 'B' and 'C' states Relief Valve should operate at 3200 psi.

Gary
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