Komatsu PC27R-8 Operation & Maintenance Manual page 169

11-Extend the boom, arm and bucket cylinders completely as in-
dicated in the figure and remove the filling cap (1).
Put back the cap and pressurize the inside of the tank lower-
ing the equipment to the ground.
12-Make sure that all the control levers are in neutral and let the
engine idle for 2÷3 minutes before operating the work equip-
ment.
Move each piston more than once in order to deaerate the
system; check the level again and top up if necessary.
CAUTION
Do not start the engine with empty tank, since this would
certainly damage the pump.
IMPORTANT
The hydraulic oil of the machines equipped with demoli-
tion hammer deteriorates more rapidly than the oil of the
machines used for simple digging operations.
Perform the oil changes according to the indications giv-
en in the table beside.
MAINTENANCE PLAN
Replacement interval
for hydraulic oil
2000
1500
1000
500
0 20 40
Breaker operating
ratio (%)
RWA06730
60 80 100
RWA10220
167