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D12 Allis hydraulic pump |
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Showboat six
Bronze Level Joined: 28 Feb 2024 Location: Oregon Points: 3 |
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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 Edited by Showboat six - 28 Feb 2024 at 10:17pm |
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only AC orange
Silver Level Access Joined: 06 Dec 2014 Location: Eastern Indiana Points: 473 |
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Possibly the traction booster is stuck not permitting oil to flow?
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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 20583 |
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Is this a "gear" type pump??? or one similar to a model "CA" or "WD" tractor ??
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Macon Rounds
Orange Level Joined: 18 Feb 2010 Location: Pittsburgh Pa Points: 2147 |
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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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Fred in Pa
Orange Level Joined: 13 Sep 2009 Location: Hanover Pa. Points: 9210 |
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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.
Edited by Fred in Pa - 29 Feb 2024 at 8:04am |
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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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Showboat six
Bronze Level Joined: 28 Feb 2024 Location: Oregon Points: 3 |
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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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DrAllis
Orange Level Access Joined: 12 Sep 2009 Points: 20583 |
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Fill compartment with oil---self priming. Screw "D" must be clear OUT.
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