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


D21 Hydraulics

 Post Reply Post Reply
Author
Message
DSeries4 View Drop Down
Orange Level
Orange Level
Avatar

Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7190
Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Topic: D21 Hydraulics
    Posted: 24 May 2020 at 9:52pm
Couple of questions for those who have intimate knowledge of the D21 hydraulic system...

Question #1:  Are all D21s hard to steer at low idle?  Fluid is right at the full mark or slightly above.  New spindles, bushings and new grease.  New steering cylinder seals as well.

Question #2:  When cultivating, the 2 left remotes were connected to the wheel lift cylinder.  It would lift fine, but it would have problems lowering the cylinder.  It would only lower the cylinder if you pushed the lever down slowly and a small amount.  Pushing it down fast would make the cylinder drop only a tiny amount and then you would hear a sound from the valve body.  Tractor does not have a 3 point and I put new remote ends on the tractor over the winter.  The cylinders on the cultivator also had new hose ends to complement the remote ends. The remotes on the right side worked well for raising and lowering the wings. 
Today I put the wheel cylinder on the right side set of remotes - It raised fine once, but it would not lower at all.

Any thoughts?  I am starting to think one of the hose ends could be the problem...

Appreciate the help!
'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
Back to Top
Sponsored Links


Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2020 at 10:03pm
Define what "idle" speed actually is. I would say from 800 RPM and up, I would expect easy steering. If not, check the vertical flow divider spool on the rear manifold of the pump for sticking. Your lift/lower issue sounds like couplers or hose ends.
Back to Top
DSeries4 View Drop Down
Orange Level
Orange Level
Avatar

Joined: 12 Sep 2009
Location: Ontario, Canada
Points: 7190
Post Options Post Options   Thanks (0) Thanks(0)   Quote DSeries4 Quote  Post ReplyReply Direct Link To This Post Posted: 24 May 2020 at 10:35pm
Tach doesn't work, but I would say around 800-900 rpm.  Do I have to take the whole pump apart to check, or just that section?

'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '61 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 25 May 2020 at 5:38am
Remove the hex plug (7/8" wrench) on top of the rear section of the pump and fish the spring and plunger out and polish them until free. You are guessing at RPM's.
Back to Top
Bret (OH) View Drop Down
Silver Level
Silver Level


Joined: 15 Sep 2009
Location: Blanchester, OH
Points: 347
Post Options Post Options   Thanks (0) Thanks(0)   Quote Bret (OH) Quote  Post ReplyReply Direct Link To This Post Posted: 26 May 2020 at 10:20am
Check the Quick Coupler tips to make sure they match.  Lowering problems sound like maybe incompatible tip/coupler designs.
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 0.094 seconds.


Help Support the
Unofficial Allis Forum