POCLAIN HYDRAULIC
A39469B DOC-REPAIR-PM10-FR-EN 7
TROUBLES CAUSES REMEDIES
Warn circuit component Recondition
(leaks) or replace
Circuit operating Adjust pressure
pressure too high
Too high fluid Incorrect fluid viscosity Replace fluid
temperature
Insufficient cooling Check operating conditions
or check the installation
Contaminated or poor Replace fluid
quality fluid
Contaminated or poor Replace fluid
quality fluid
Clogged filters Replace cartridges
EXCESSIVE High and low utilization Insufficient oil Check LP valve setting
HEAT exchange
Too high speed Adjust speed
Damaged boosting Recondition
pump or replace
Tighten suction
Air in the fluid connections, fill tank
up to level, bleed
air closed in circuit
Servo-positioner doesn’t Leaks in the pump to Recondition
High utilization only work anymore exchange valve circuit or replace
Servo-positioner Setting of HP valves too Recondition
works low or worn valves or replace
Lack of fluid Fill tank up
to normal level
Lack of fluid Fill tank up
to normal level
Clogged filters Replace them
Clean them
Bad pump feeding Contaminated fluid Replace it
Clogged tank air intake Clean it
Increasing with swash Too high speed Replace it
plate incline Setting or recondition of Check setting
EXCESSIVE the boost and or
NOISE exchange valves recondition
Boosting pressure Damaged boosting Recondition
too low <17 bar pump or replace
Heavy leaks
at the Check leaks
circuit components
Tighten the suction
Increasing with swash connections, fill tank up
plate incline and Air in the fluid to level bleed closed
with no incline air in circuit
replace pump shaft seal
Wrong alignment Adjust
pump drive or recondition
Damaged pump Recondition
or replace
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