Removal - Komatsu PC20R-8 Shop Manual

REMOVAL AND INSTALLATION
REMOVAL OF THE PUMP
Lower the working equipment until it is resting on the
ground and stop the engine.
Release all residual pressures from the circuits and
the tank. (For details, see «20. CONTROLS AND AD-
JUSTMENTS»).
H Drain the hydraulic oil.
1 - Remove the engine hood (1). (For details, see «RE-
MOVAL OF THE ENGINE HOOD»).
2 - Remove the L.H. side counterweight (2).
L.H. side counterweight: 29 kg
3 - Remove the exhaust pipe (3).
4 - Disconnect from the pump the Load Sensing tube (5),
the delivery tube (4) and the suction tube (6).
5 - Attach the pump to some hoisting tackle and apply a
slight tension to the cable.
6 - Loosen the screws (7) (PC20R-8 në 2 - PC27R-8 në 4)
and remove the pump (8).
Pump: PC20R-8 19 kg
PC27R-8 22 kg
INSTALLATION OF THE PUMP
To install, reverse the removal procedure.
.
Pump screws: Loctite 262
Pump screws: 75 Nm
Pump shaft: Molikote
1 - Fill the hydraulic oil tank to maximum level.
Hydraulic oil needed: approx. 29
Bleed the air from the pump. (For details, see «20.
CONTROLS AND ADJUSTMENTS»).
2 - Start the engine to circulate the oil and check that
there are no leaks.
3 - Stop the engine, check the oil level and, if necessary,
top it up.
4 - Bleed air from the hydraulic circuits and pressurise
the tank. (For details, see «20. CONTROLS AND AD-
JUSTMENTS»).
30-30
PC20R-8
7
PC27R-8
,
3
6
3
4
5
4
PUMP
1
2
RKPA2851
8
5
RKPA3860
7
6
RKPA3850
PC20R-8 PC27R-8