OM-240 113 Page 38
Trouble
Remedy
Slow outrigger operation.
Flow control valve H
−
FC1 is partially plugged with contaminates causing higher pressure drop across
the valve. Replace valve and flush system.
Differential pressure setting of pump (load sense) set too low. Have Factory Authorized Service Agent
check setting and correct as necessary.
Flow being dumped through crane relief valve instead of being directed to system, possibly caused by
system contamination. See crane manufacturer’s owners manual.
Hydraulic oil viscosity too high. Consult Section11-1 for correct fluid viscosity recommendations at
specific ambient temperatures.
Fast outrigger operation.
Differential pressure setting of pump (load sense) set too high. Have Factory Authorized Service
Agent check setting and correct as necessary.
Hydraulic oil viscosity too low. Consult Section 11-1 for correct fluid viscosity recommendations at
specific ambient temperatures.
Crane lifting capacity not met (low
pressure).
Pump maximum pressure setting too low. Check setting and correct as necessary.
Check crane model hydraulic requirements. Pump may need to be reset (consult Factory Authorized
Service Agent).
Relief valve in crane system set too low. See crane owner’s manual to correct.
Relief valve in crane system stuck open from contamination. See crane owner’s manual to correct.
Hydraulic pump belt slipping. Replace belt and/or tensioner.
Notes
