Doosan HP900, Operation & Maintenance Manual

Page: 82 / 90

Fault Finding Operating & Maintenance Manual
Book: 22846471 (3-09-07) Rev. B 81
Safety valve
operates. Operating pressure too
high. Check the setting and operation of the
regulator valve piping.
Incorrect setting of the
regulator. Adjust the regulator.
Faulty regulator. Replace the regulator.
Inlet valve set
incorrectly. Refer to SPEED AND PRESSURE
REGULATION ADJUSTMENT in the
MAINTENANCE section of this manual.
Loose pipe/hose
connections. Check all pipe/hose connections.
Faulty safety valve. Check the relieving pressure. Replace the
safety valve if faulty.
DO NOT ATTEMPT A
REPAIR .
Oil is forced back
into the air filter. Incorrect stopping
procedure used Always employ the correct stopping
procedure. Close the discharge valve and
allow the machine to run on idle before
stopping.
Faulty inlet valve. Check for free operation of the inlet valve(s).
Machine goes to full
pressure when
started. Inlet valve set
incorrectly. Refer to SPEED AND PRESSURE
REGULATION ADJUSTMENT in the
MAINTENANCE section of this manual.
Faulty load valve. Replace the valve.
Machine fails to
load when the load
button is pressed. Faulty load valve. Replace the valve.
FAULT CAUSE REMEDY
Book:46623600 (10-12-2012) Rev. A