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


Model C hydraulic problem
 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: 312 		Post Options Post Options   Thanks (0) Thanks(0)   Quote John426 Quote  Post ReplyReply Direct Link To This Post Topic: Model C hydraulic problem
    Posted: 21 hours 9 minutes ago at 10:38am
Hi,

I had a problem with insufficient pressure in the hydraulic lift of my Allis Chalmers C. I replaced the weak discharge spring, which was too weak. Now I have the correct pressure, and the lift functions properly. However, it doesn't hold the load. The cylinder lowers as soon as I release the lever.
The entire pump was disassembled, cleaned, and the balls were replaced; everything seemed fine. There were no marks on the ball seats.
What could be the cause of this problem? 
Is there an adjustment I need to make?
Back to Top
Sponsored Links


Back to Top
SteveM C/IL View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8681 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SteveM C/IL Quote  Post ReplyReply Direct Link To This Post Posted: 19 hours 11 minutes ago at 12:36pm
not familiar with a C but sounds like an adjustment or simply not operating correctly. WD has a hold valve and linkage adjustments needed when not functioning properly.
Back to Top
PaulB View Drop Down
Orange Level
Orange Level


Joined: 12 Sep 2009
Location: Rocky Ridge Md
Points: 5163 		Post Options Post Options   Thanks (0) Thanks(0)   Quote PaulB Quote  Post ReplyReply Direct Link To This Post Posted: 14 hours 18 minutes ago at 5:29pm
When rebuilding the pump, did you replace all of the ball seats? When you replace the seats, you need to take a NEW ball and use a good size punch and hammer to give the ball a solid WHACK. This will assure that the seat confirms to the roundness of the ball. Then that ball gets thrown away and a NEW ball is used on that seat. A new ball must be used in this process for every seat, and in turn that ball gets thrown away and then the next seat...  
If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY
Back to Top
steve(ill) View Drop Down
Orange Level Access
Orange Level Access
Avatar

Joined: 11 Sep 2009
Location: illinois
Points: 88554 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 12 hours 27 minutes ago at 7:20pm
i had that happen... NO HOLD... when the external friction plate and backer plate ( #33- #34) got stuck together.. I think that spring #14 ( external ) broke... This allows the SPOOL #12 inside to not seat on the flat spot on the shaft #13......  Work the outside plate and see that it moves free, the friction plate is not stuck to it, and it seems to "SEAT" when you release the plate.( feel the DETENT.... The "SEAT" is the relief spool #12  setting on the flat spot of the #13 shaft for the "HOLD - DETENT" position... If everything OUTSIDE is OK... You might have internal  problem with the spool / shaft  / seat face ..




Edited by steve(ill) - 12 hours 24 minutes ago at 7:23pm
Like them all, but love the "B"s.
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 0.105 seconds.


Help Support the
Unofficial Allis Forum