7000 rear hydraulic pressure
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=141455
Printed Date: 01 Jan 2026 at 1:51am
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Topic: 7000 rear hydraulic pressure
Posted By: Tim NH
Subject: 7000 rear hydraulic pressure
Date Posted: 14 Aug 2017 at 6:07pm
I only have 700 lbs at idle. At 1200 rpm the gauge shows 1200 lbs. At 1800 rpm its 2250. Is this low reading at lower rpm normal. Tim
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1950 WD 1959 D14 1955 WD45 1976 7000 B 207
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Replies:
Posted By: MACK
Date Posted: 14 Aug 2017 at 9:47pm
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Sounds about right. Where are you checking it? MACK
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Posted By: Tim NH
Date Posted: 15 Aug 2017 at 4:58am
Right at both rear outlets. Tim
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1950 WD 1959 D14 1955 WD45 1976 7000 B 207
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Posted By: tomNE
Date Posted: 15 Aug 2017 at 5:27am
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If you wanna install a loader you will need to shim the pump. good AGCO dealer will walk you thru the process. I'd call 2250lb as normal.
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AC from the start of my families farming career till the end!
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Posted By: Hurst
Date Posted: 15 Aug 2017 at 11:23am
I'd like to hear more peoples' experience with this, as my 7000 is much like this as well. It makes it a bit annoying bc not much will operate at idle. My fords all put out full pressure with a gear pump at idle. I'm thinking my pump might be a little on the worn out side, I've adjusted the relief pressure at the remote valves to 2300 psi, but I have to be close to 2000 rpms to get that. Anyone have one with a new pump or remember from when they were new? Do these pumps turn too slow at idle to be very efficient?
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: Tim NH
Date Posted: 16 Aug 2017 at 6:18am
I haven't turned mine up yet Hurst. I thought the problem was unique to just my tractor. Tim
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1950 WD 1959 D14 1955 WD45 1976 7000 B 207
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Posted By: Pete from IL
Date Posted: 16 Aug 2017 at 6:44am
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The pump has been rebuilt on my 7000 and still the same as yours, very low pressure and flow at low rpm.
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Posted By: DrAllis
Date Posted: 16 Aug 2017 at 7:14am
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That's the way it is. The priority valve sees to it that the power steering works good at slow speeds and as a result, the lift system isn't very good. Get over it or get a 7010 or bigger.
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Posted By: Hurst
Date Posted: 16 Aug 2017 at 6:40pm
Did they change much between the 200 and 7000? Or do they act the same as well?
Hurst
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: wayneIA
Date Posted: 16 Aug 2017 at 8:13pm
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My 190XT III is the same way, to get good pressure you need to rev the engine some. My D21 II will give full hydraulic pressure at an idle. I don't remember if the 200 I ran for a farmer had good pressure at an idle or not, most of its time was spent on a feed mill and not running hydraulics. The 190 doesn't do bad once you get to around 1200-1400 rpm, but for full pressure you usually need at least 1500 rpm.
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Posted By: DrAllis
Date Posted: 17 Aug 2017 at 7:18am
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Very late XT's and 200's had the same hyd pump which are similar (but not the same) as a 7000.
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Posted By: lentsch
Date Posted: 17 Aug 2017 at 10:10pm
I had to put a new pump on my 7000(black belly), now the power steering works better than it did for quite a while but the PTO disengages when I shift the power shift. Kind of annoying. Maybe your pump is getting tired?
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WD,D15,190XT,7000,8010x2,7060,8070
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Posted By: Hurst
Date Posted: 18 Aug 2017 at 6:58am
Mine also disengages when I shift the powershift sometimes, but I'm not sure my pump isn't a little tired. I think the spring in the spool can be cut down a little to help with that problem, but haven't tried it yet.
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1979 Allis Chalmers 7000
5800 Hours
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Posted By: DrAllis
Date Posted: 18 Aug 2017 at 7:23am
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Some black belly 7000's had an occasional issue with the PTO lever jump-out and there may have been an orifice fix for it. I cut off the spring if I remember right....didn't have only 1 or 2 of those models to contend with.
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Posted By: Tim NH
Date Posted: 18 Aug 2017 at 7:48pm
Thank you guys for the information. I was talking to a guy at the GOTO today. Who mentioned I could swap the relief valve from the traction booster, just to make sure the lift valve wasn't sticking. Tim
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1950 WD 1959 D14 1955 WD45 1976 7000 B 207
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Posted By: tbran
Date Posted: 20 Aug 2017 at 2:45pm
The draft control outlet line can be tee'd into the flow to the remote/3 point - draft will now not work well but.... Adds about 3 gpm to the flow.
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When told "it's not the money,it's the principle", remember, it's always the money..
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