This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


Hydraulic Pump Allis Chalmers C
 Post Reply Post Reply
Author
Message
  Topic Search Topic Search  Topic Options Topic Options
John426 View Drop Down
Silver Level
Silver Level


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: 30 Nov 2025 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 - 13 hours 24 minutes ago at 2:36am
Back to Top
Sponsored Links


Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 88942 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2025 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.
Back to Top
Alvin M View Drop Down
Orange Level
Orange Level


Joined: 24 Jun 2018
Location: PA
Points: 813 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Alvin M Quote  Post ReplyReply Direct Link To This Post Posted: 30 Nov 2025 at 3:51pm
Takes 4 70915904 Balls for intake and discharge 5/16 and 1 70915906  for relief valve 3/16
Back to Top
John426 View Drop Down
Silver Level
Silver Level


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 Posted: 12 hours 51 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?
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.043 seconds.


Help Support the
Unofficial Allis Forum