Farm Equipment - 7040 steering problem

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7040 steering problem

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=99136
Printed Date: 15 Aug 2025 at 3:36pm
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Topic: 7040 steering problem

Posted By: ycattle1
Subject: 7040 steering problem
Date Posted: 17 Dec 2014 at 3:12pm

Bought a 7040 at auction and the powering steering lags. you turn the wheel and then the wheels will turn slowly. I this a power steering pump problem? New to the 7040 so not sure what I'm looking at.

Thanks

Replies:

Posted By: SteveM C/IL
Date Posted: 17 Dec 2014 at 5:18pm

It don't have a p/s pump as such.It runs off one of the 3 hyd pumps but I don't remember which one.Someone will know what your problem is.DrAllis or MACK will know whats up.

Posted By: ycattle1
Date Posted: 17 Dec 2014 at 6:30pm

Thanks, Steve M

Posted By: Ronnie
Date Posted: 17 Dec 2014 at 7:29pm

Had a similar problem with a 7040 the priority valve was sticking had to clean it and it works fine now it's on the pump tward the front of the tractor has two plugs on it u can pull it out through the plugs and clean it

Posted By: Lynn Marshall
Date Posted: 17 Dec 2014 at 9:30pm

Check the left side filter to be sure that the screen is there. Also, jack the front end up, remove the steering hoses, and be sure that there isn't anything in the front spindle area that is binding on the power steering.

Posted By: MACK
Date Posted: 17 Dec 2014 at 9:41pm

The gear pump (middle) runs power steering. There is a plug on the middle pump that takes a 11/4 wrench. Remove nut, next a cap, spring, orffic plate(small flat washer with a small hole) then the spool valve. The spool may be stuck in housing. Get it out and polish it up.

Check left filter in rearend housing. Screen may be missing or worst filter pluged with metal.

Hope this helps. If not let us know. MACK

Posted By: ycattle1
Date Posted: 18 Dec 2014 at 1:21pm

Thank you for the info, I will pull it apart this weekend.
Thanks again

Posted By: GM Guy
Date Posted: 27 Jul 2018 at 2:15am

what is suggested to polish the spool valve? I picked up a 7040 with sluggish steering that I need to correct.

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Gleaner: the properly engineered and built combine.

If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help.

Posted By: Lonn
Date Posted: 27 Jul 2018 at 8:13am

My 7050, when I first bought it, turned like wrestling a bear. The right spindle had no grease zerk and I had to beat the spindle out with a 16# mall by first fighting to pull the axle from the tube and turning it upside down and putting back in tube, mine was just packed with dirt......... yada yada yada long story short, check that the spindle isn't stuck from lack of grease.

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Posted By: LB0442
Date Posted: 27 Jul 2018 at 9:33am

I use 2000 grit, same as you would use for wet sanding paint. Very important you must use it wet. I usually sand things like that in the solvent tank.