Service Manual Damcos LPU: Troubleshooting Guide LPU
SM 8000-100-01 Ed 04 February 2017
66
Too little tank volume for operating actuator
LPU
• Incorrect oil filling and de-airing of actuator. Check oil filling.
• Too high compressibility of oil in pipes between hand pump and LPU or between LPU and actua-
tor. Try more carefully de-airing of piping. It might be necessary to use an expansion tank at LPU.
Expansion tank at hand pump is not allowed as it gives risk of oil spillage at breather valve.
LPU-S
No connection from LPU-tank and hand pump tank to actuator tank/spring chamber. Hand pump
tank and LPU tank need tank connection to actuator to maintain constant oil volume in system for
mix of emergency and remote operation.
For large actuators
Oil compression by pressurizing actuator needs more oil than a standard tank can give. Use pressure
tank for LPU. This is the case for e.g. BRC/BRCF 16000, BRC 32000, BRCF 4000 HT, BRCF 8000 HT,
KC 325 and KC 400.
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