Farm Equipment - allis 7020 hyd help

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allis 7020 hyd help

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Category: Allis Chalmers
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=39311
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Topic: allis 7020 hyd help

Posted By: john
Subject: allis 7020 hyd help
Date Posted: 21 Oct 2011 at 2:39pm

I have a 7020 I was out spraying today and the power steering got hard to steer and the hyd got jerkey It works just not as it should .I changed oil and filters and it is the same .The pto and power director are ok ....Is it the hyd pump ?thanks for your help ..

Replies:

Posted By: MACK
Date Posted: 21 Oct 2011 at 9:15pm

Are you sure it is full of oil? Screw the bottom sight glass to make sure it is full.

I have saw after market filter shrink after use and new after market filters too short when new.

If all above is ok, flow divider may be stuck. MACK

Posted By: Adam Stratton
Date Posted: 22 Oct 2011 at 5:54am

I just had a similar go round with my 7060. I followed MACK's advice and bought AGCO filters and put it, refilled, and I was just fine. I lost PTO also though. He is also right about taking out the sight glasses and cleaning them/checking if oil runs out. I could only get the top one out of the 7060, but both of them looked like they had oil in them, but was just decades of crud. Cleaned it out so I knew I could see through it if it was empty and poured oil in while watching it, That way, I knew for sure i had oil.

Posted By: john
Date Posted: 22 Oct 2011 at 7:23am

it has oil and am sure the filters are ok .were is the flow divider ? is that the pressure compensator you are talking about ? was going to look at the compensator after looking at the parts book .was working fine then it started .so has to be something stuck or broken .the pump is working just the hyd ans steering are week ang jerkey .there is avibration in the valve asy .

Posted By: MACK
Date Posted: 22 Oct 2011 at 8:20am

The flow divider is on the middle pump. It is toward right side next to small fuel tank. Takes a 11/4 wrench to remove plug.

When you changed filters and oil, did you put the screen from old filter (left side) into new filter with screen in first?

How much oil did you put in when you changed oil and filters?

Where did you put the oil in at? MACK

Posted By: john
Date Posted: 22 Oct 2011 at 5:53pm

we put over 10 gal in by the 3 point hitch the filter did have the screen put on it .the flow divider looked ok .Going to look at that filter on the left side to be sure it is all ok there .it does sound like it is starved for oil ? thanks for all your help ........

Posted By: Kevin in WA
Date Posted: 22 Oct 2011 at 6:28pm

The screen goes in the LH filter and put the filter in with screen to the inside, it also needs about 15 gals of oil.

Posted By: john
Date Posted: 22 Oct 2011 at 7:40pm

yes screen is on the inside on LH side never used 15 gal and over 10 like 12 gal or so should not be short on oil ..I have a 7040,7050,7045 and 7020 ...had this prob befor I changed the filters .