Komatsu HM400-5, Operation & Maintenance Manual

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METHOD FOR BLEEDING AIR FROM HYDRAULIC CIRCUIT
When hydraulic equipment is repaired or replaced, or the hydraulic piping is disconnected, the air must be bled
from the circuit.
NOTICE
If the air is not bled, it stays in the suction piping and can
damage the pump.
When filling the tank with oil after draining the hydraulic
oil with the pump suction piping disconnected, be sure to
bleed air.
(1) Pump
(2) Air stays in intake piping
(3) Hydraulic tank
1.
Raise the front section of the cab. For details, see “METH-
OD FOR OPERATING CAB TILT (3-204)”.
2.
Bleed air through bleeder (4).
3.
After bleeding air, lower the cab. For details, see “METH-
OD FOR OPERATING CAB TILT (3-204)”.
METHOD FOR CHECKING PLAY OF OUTPUT COUPLING OF OUTPUT SHAFT
k k
WARNING
To prevent the machine from moving, set the parking brake switch to “PARKING”, stop the engine, then
chock the wheels.
If any unusual noise occurs around the output shaft (1) or front drive shaft (2), the rubber inside the output shaft
may be deteriorated or damaged, so check the play of coupling (3) as follows.
When getting on or off the machine with carrying a wire, a tool,
etc., place it once in part (A) to ensure your safety.
MAINTENANCE PROCEDURE MAINTENANCE
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