Komatsu F30791, Shop Manual

Page: 152 / 298

ADJUSTMENT OF THE PPC VALVE CLEARANCES
20-36
TESTING AND ADJUSTMENTS ADJUSTMENT OF THE PPC VALVE CLEARANCES
The clearance of the PPC valve (hand and foot) levers is
adjusted as follows.
Lower the working equipment to the ground and stop
the engine.
Turn the ignition key to the « I » position and move the
command levers in all directions in order to release
all pressure in the hydraulic circuits.
Return the ignition key to the « O » (OFF) position and
remove it.
Push the lever of the safety device into the
«LOCKED» position.
Slowly loosen the oil-tank refuelling cap to eliminate
residual pressure.
1 - Remove cap (1).
2 - Loosen the nut (2) that retains the disc (3).
3 - Tighten the disc (3) until it makes light contact with
the 4 push-rods (4).
H During this adjustment, take care not to acti-
vate any of the push-rods (4) individually.
4 - Secure this position by tightening the retaining nut
(2) to the specific torque.
Retaining nut: 113 w 15 Nm
PC20R-8 PC27R-8
RKP06380
2
3
4
1