Farm Equipment - 7030 Hyd Question

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7030 Hyd Question

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=25097
Printed Date: 25 Feb 2025 at 12:01am
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Topic: 7030 Hyd Question

Posted By: Bill Deppe/AC Salvag
Subject: 7030 Hyd Question
Date Posted: 02 Feb 2011 at 1:21pm

Would like some suggestions on why the three point on a 7030 doesn't lift. The remote handle doesn't remain back in detent, just goes forward. There is some sound when the handle is pulled back, but no movement. The pto seal leaked the fluid out, but after repairing it, the three point quite operating. All the other hydraulic remotes and steering works fine. The traction boost linkage appears fine and operates freely. Any help would be appreciated.

Replies:

Posted By: skipwelte
Date Posted: 02 Feb 2011 at 2:02pm

Ive had the spool that lifts the three point sieze in the bore, three point wont lift or wont lower. Take the oblong cover off the back, and see if the spool moves. You can get the spool out of the valve, it goes out the back, Ive done it in the corn field before, but I cant remember how much stuff is on the front has to come apart. Might have to hone the bore with a brake hone and clean up the spool. good luck.

Posted By: Bill Deppe/AC Salvag
Date Posted: 04 Feb 2011 at 9:16am

Been some time since observing this, is it something that can come off as an assembly?

Posted By: allis1984
Date Posted: 04 Feb 2011 at 3:03pm

did ya check the valve pilot checks to make sure its not stuck shut

Posted By: skipwelte
Date Posted: 04 Feb 2011 at 4:15pm

Bill, this is the right hand valve on the stack, the other valves bolt to it. You can remove the valve, youll have to take the tie bolts out as they are all bolted together. Its a little pesky gettin around the front to unhook the linkage,. Good luck.

Posted By: Kenny L.
Date Posted: 05 Feb 2011 at 5:56pm

Today I took the oblong cover off and the spool is moving but the 3pt. still willn't work and I still don't have any detent and the lever just want to go all the way forward to put the lever in the down positions. Is there anything else that we need to look for. THanks Kenny L.

Posted By: allis1984
Date Posted: 05 Feb 2011 at 6:00pm

do your remotes work? And just not three point. Or nothing at all? need some more info

Posted By: Kenny L.
Date Posted: 05 Feb 2011 at 6:05pm

Yes the remote work and the streeing,it is just the 3pt. Kenny L.

Posted By: allis1984
Date Posted: 05 Feb 2011 at 6:14pm

did ya check the pilot checks? is the lever hooked up?

Posted By: DrAllis
Date Posted: 05 Feb 2011 at 7:13pm

There is not a "detent" for the 3-point hitch valve on a 7030. When the spool is moved to the rear, the hitch should go up. Just because your "remote" levers detent, that doesn't mean they actually work.......will they lift a load????

Posted By: DrAllis
Date Posted: 05 Feb 2011 at 7:28pm

I'm going to assume that the remotes actually work (both in raise AND lower). Pull back on one of the remotes and while holding it rearward, then try to raise the 3-point....if that makes the hitch lift, then the pilot check is stuck open on the 3 pt valve.

Posted By: Kenny L.
Date Posted: 06 Feb 2011 at 12:57pm

Ok I went out and tryed what Dr. allis said to do and the 3pt. still didn't work. What else do we need to look at. Thanks for all the help Bill & Kenny

Posted By: MACK
Date Posted: 06 Feb 2011 at 3:29pm

With the cover off the back, will the lever in cab move the spool all the way both directions? Sounds like a linkage problem or the cylinder on back end has a problem (piston busted- dog bone fell out- cylinder support broke and let cylinder slide away from end cap. Have saw all of these happen. Unhook line at valve going to 3pt cylinder and cap at valve. Pull 3pt lever if pump makes noise, then you have problems inside. MACK