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Hydraulic Pump Allis Chalmers C
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John426 View Drop Down
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Joined: 14 Aug 2012
Location: France
Points: 315 		Post Options Post Options   Thanks (0) Thanks(0)   Quote John426 Quote  Post ReplyReply Direct Link To This Post Topic: Hydraulic Pump Allis Chalmers C
    Posted: 18 hours 23 minutes ago at 10:49am
Hi
On the hydraulic pump of the model C ; there are 4 balls
- 2 balls for intake valve item 27 , ref number 70915904 , 5/16" , is it correct?
- Another one are the 2 discharge valve ball. Also 70915904 , 5/16" , is it correct?
- And the last, Releif Valve item N° 7 reference 70915906 . This should be smaller only 3/16" does this size correct ( the others are 5/16")

?


Edited by John426 - 2 hours 36 minutes ago at 2:36am
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steve(ill) View Drop Down
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Joined: 11 Sep 2009
Location: illinois
Points: 88932 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 13 hours 26 minutes ago at 3:46pm
i think #3 and #21 ( intake and discharge) are the same size... #10 is smaller.. i dont remember the diameter.
Like them all, but love the "B"s.
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Alvin M View Drop Down
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Joined: 24 Jun 2018
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Points: 813 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 13 hours 21 minutes ago at 3:51pm
Takes 4 70915904 Balls for intake and discharge 5/16 and 1 70915906  for relief valve 3/16
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John426 View Drop Down
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Points: 315 		Post Options Post Options   Thanks (0) Thanks(0)   Quote John426 Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 3 minutes ago at 3:09am
When the pressure ot 3200 PSI is correct. But the implement on the lift doesn't stay on the hold position.
Does it means that the Relief valve is leaking?  
What is the symptom of a Discharge valve leakage?

The manual says : pressure is 3100 lbs. on properly functionning pump , .... there will be a slow dropping of pressure ....  the pressure become stationary at 1500 lbs.
Does this means that the normal hold pressure for the implement up is 1500 lbs, for example during transport or everything else.
So to be clear and well understand. The lifting force would be at 3200 lbs, and then the load holding force would be lower at only 1500 lbs.  Is it correct?
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