D12 Allis hydraulic pump
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=200033
Printed Date: 13 Nov 2024 at 3:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D12 Allis hydraulic pump
Posted By: Showboat six
Subject: D12 Allis hydraulic pump
Date Posted: 28 Feb 2024 at 10:17pm
I am working on a 1961 Allis D12 with the PTO hydraulic pump and I cannot get it to make any pressure. I have bled quart and a half of oil out of the hydraulic ram hose but I cannot get it to pump any kind of pressure. Any ideas??
This is the first running of a restoration and I have no information on whether the pump ever worked before the restoration was started.
Any information would be greatly appreciated.
Showboat
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Replies:
Posted By: only AC orange
Date Posted: 29 Feb 2024 at 7:27am
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Possibly the traction booster is stuck not permitting oil to flow?
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Posted By: DrAllis
Date Posted: 29 Feb 2024 at 7:50am
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Is this a "gear" type pump??? or one similar to a model "CA" or "WD" tractor ??
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Posted By: Macon Rounds
Date Posted: 29 Feb 2024 at 7:52am
I had one of those pumps that was worn badly and it pumped the oil past its drive shaft back into rear housing of the tractor.
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The Allis "D" Series Tractors, Gravely Walk behind Tractors, Cowboy Action Shooting !!!!!!! And Checkmate
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Posted By: Fred in Pa
Date Posted: 29 Feb 2024 at 7:59am
If its the gear pump on rear of housing ,check pressure with a flowmeter directly off pump this tells u what pump is doing before relief valve .If its this pump make sure suction screen is clean on pick up tube.
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He who dies with the most toys is,
nonetheless ,still dead.
If all else fails ,Read all that is PRINTED.
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Posted By: Showboat six
Date Posted: 29 Feb 2024 at 8:07am
It’s the 4 plunger pump, is there any special priming process for them?
I get a slow oil flow out of the ramp hose when loosened, but no high pressure.
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Posted By: DrAllis
Date Posted: 29 Feb 2024 at 8:17am
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Fill compartment with oil---self priming. Screw "D" must be clear OUT.
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