Emerson Damcos - LPU-D Not Maintaining Pressure on Actuator

Damcos LPU: Troubleshooting Guide LPU Service Manual
February 2017 SM 8000-100-01 Ed 04
57
LPU-D not maintaining pressure on actuator
Pressure drops only on 1 port
• Leakage in check valves for DPCV or release valve.
Change check valves for DPCV.
• A leakage in actuator might give pressure drop on only one port.
Replace the seal set in actuator with a new one.
Pressure drops on both ports
Leakage in bypass valve (actuator) or actuator.
• Check bypass valve, possibly replace release valve (see “Replace release valve in LPU” on
page 99).
• Check actuator.