Bleeding hydraulics on 8030
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=166248
Printed Date: 19 Aug 2025 at 1:59pm
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Topic: Bleeding hydraulics on 8030
Posted By: robesonfarms
Subject: Bleeding hydraulics on 8030
Date Posted: 30 Nov 2019 at 5:47pm
| I had to rebuild the valve under the steering column on the engine side of the firewall. How do I bleed the air out of the hydraulics? It turns extremely hard. Any help would be great |
Replies:
Posted By: DougG
Date Posted: 30 Nov 2019 at 6:41pm
| Would think crack a line and turn the wheel |
Posted By: robesonfarms
Date Posted: 30 Nov 2019 at 9:13pm
| I tried that for 4 hours today and felt like I never got anywhere |
Posted By: NomoreJohnDeere
Date Posted: 30 Nov 2019 at 9:25pm
|
Air would usually cause spongy or intermittent jerky movement? ------------- HD3 |
Posted By: DrAllis
Date Posted: 30 Nov 2019 at 9:32pm
| If the effort is high, I'd suspect something is wrong in the seal area of the orbitrol you just had apart. |
Posted By: leoversteeg11
Date Posted: 01 Dec 2019 at 7:51am
| I had exact same thing happen. Wouldn’t believe that I switched 2 hoses, but I DID. |
Posted By: robesonfarms
Date Posted: 01 Dec 2019 at 1:27pm
| Which 2 hoses did you switch? |
Posted By: leoversteeg11
Date Posted: 01 Dec 2019 at 1:46pm
| That was a long time ago. 2 of the 4 obviously, but I don’t remember. Bleeding is not your issue , when the hoses are on correctly you can spin the steering wheel with one finger, I guarantee you. |
Posted By: robesonfarms
Date Posted: 01 Dec 2019 at 1:53pm
| It was very easy to steer before the seals went out |
Posted By: robesonfarms
Date Posted: 01 Dec 2019 at 1:56pm
| I bought the seal kit and the bearing kit for it and replaced everything exactly how the diagram shows. I'm to the point now do I just buy a new valve or try to fix this one again |
Posted By: MACK
Date Posted: 01 Dec 2019 at 8:25pm
| Hoses are switched. MACK |
Posted By: SteveM C/IL
Date Posted: 02 Dec 2019 at 9:24pm
| Did you get it fixed? |
Posted By: robesonfarms
Date Posted: 02 Dec 2019 at 9:45pm
|
Hoping to go and try to figure it out tomorrow morning. I do have another question. On this same tractor how do I figure out which 3 wires need to be hooked up to the bottom side of the alternator? |
Posted By: robesonfarms
Date Posted: 02 Feb 2020 at 1:21pm
| I put it on exactly how it is supposed to be put on, its locked turning in to the left. I switched the hoses and its jerky, but the wheel will turn in the opposite direction I'm wanting to turn it. Any help would be useful. Thank you |
Posted By: DrAllis
Date Posted: 02 Feb 2020 at 4:13pm
| I'm afraid the harsh reality is this: you need to go somewhere and find another 8000 series tractor and VERIFY the hose connections. You have switched hoses and still have troubles ?? |
Posted By: SteveM C/IL
Date Posted: 02 Feb 2020 at 7:23pm
| I had valve off tractor to put new seal in top(8070) never had to bleed anything at startup....took care of itself. |
Posted By: MACK
Date Posted: 02 Feb 2020 at 9:15pm
| Did the valve turn free before it was put back on? If bolts were taken out, were they torqued even or over torqued? MACK |
Posted By: robesonfarms
Date Posted: 03 Feb 2020 at 2:13pm
| I went to the local agco dealership and a gentleman showed me the exact way the lines are supposed to go on. I went off that diagram as well. The torque specs said 225 inch lbs of torque. |
Posted By: wekracer
Date Posted: 03 Feb 2020 at 3:54pm
| Did you pull the orbital valve out. If so You may have gotten it out of time. I have heard that’s how they act when out of time. Good luck |
Posted By: robesonfarms
Date Posted: 03 Feb 2020 at 4:07pm
| Should the tires be straight when putting this control valve on? |
Posted By: SteveM C/IL
Date Posted: 03 Feb 2020 at 7:58pm
It makes no difference. That valve is nothing more than a fluid director. Turn one way and it puts pressured oil out one line...turn it the other way and it puts pressured oil out the other line. It don't care where the cylinder is positioned when you begin.
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robesonfarms wrote:Posted By: Gregor
Date Posted: 04 Feb 2020 at 9:44am
| Just a thought, did you happen to change the hydr filters during this time frame? There is a piece on the end of the filter if not reinstalled, it will act that way. Been down that road once. |
Posted By: SteveM C/IL
Date Posted: 04 Feb 2020 at 10:10pm
Interesting! Sometimes guys do more than one thing at a time and have a situation show up that is caused by something else but it isn't mentioned.
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