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Anonymous Poster

Problem in Axial Piston Pump

03/21/2006 8:27 AM

hesham nabil writes:
Closed loop hydraulic system consists of Denison axial piston pump type P24S feeding Haaglund motor MB283. The problem: when I put the speed control switch to the zero position the motor stops completely, then after 3 seconds the motor begins to rotate again at a very slow speed (no electrical signal exists).
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LPMosher
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Join Date: Dec 2005
Posts: 6
#1

Problem in Axial Piston Pump

03/22/2006 9:23 AM

Assuming that the pump is still running, ie pressure is available at the speed control valve, your valve is leaking. If there is no valve, as in your pump directly feeds the motor, the pump is not at zero displacement when you are commanding zero speed.
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Emjay4119
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Join Date: Dec 2005
Location: Queensland Coalfields Australia.
Posts: 697
Good Answers: 11
#2
In reply to #1

Re:Problem in Axial Piston Pump

04/04/2006 2:01 AM

There should be a null adjustment to ensure the swash plate is actually at zero. If the control valve is worn some designs also have an adjustable null to compensate.
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