Service Manual Damcos LPU: Troubleshooting Guide LPU
SM 8000-100-01 Ed 04 February 2017
68
LPU leaking from bleeder valve when hand pump is
mounted
Reason: For LPU-S
• Bad T-connection from LPU to hand pump:
– Check piping and connections.
– Check that no by-pass valve is placed in T-side of hand pump, as free T-flow is essential for
function of hand pump.
For LPU-D
• At remote operating LPU is compressing oil in piping for hand pump or, when bulkhead mounted
LPU, for actuator. The oil volume needed for compressing this oil is depending on oil volume in
pipes and proper de-airing. This oil volume will be taken from hand pump tank and cannot be
returned because of DPCV in hand pump.
– If de-airing of piping is OK a pressure tank at LPU has to be mounted.
Caution! Pressure tank at hand pump is not allowed.
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