Komatsu PC110R-1, Operation & Maintenance Manual

Page: 158 / 212

MAINTENANCE PLAN
156
4.7.3.e CHECKING THE OIL LEVEL IN THE HY-
DRAULIC CIRCUIT
DANGER
•
The oil level in the hydraulic circuit must be checked with
cold oil and the machine positioned on level ground, with
retracted bucket and arm cylinders, cylinders of the two-
piece boom extended and bucket teeth resting on the
ground.
•
Top up after stopping the engine and eliminating the resid-
ual pressures from the equipment circuit (by moving the
controls several times) and from the tank (by slowly loos-
ening the filling cap).
The oil level must be visible through the gauge (1) positioned on
the tank and must be included between the MIN. and MAX.
marks.
If the level is near the MIN. mark, top up through the filler (2) with
suitable hydraulic oil (see “4.3 FUEL, COOLANT AND LUBRI-
CANTS”).
IMPORTANT
☞
•
When topping up, do not exceed the MAX. level.
This would damage the hydraulic circuit and make the oil
flow out.
•
If a constant or abnormal decrease in the oil level is ob-
served, thoroughly check the hydraulic circuit, the pistons
and the pump for leaks.
1
RWAA12140
RYA15800
RYA15790
RWAA5490
2