Komatsu PC130-7 Operation & Maintenance Manual page 128

MACHINE OPERATIONS AND CONTROLS
Check Oil Level in Hydraulic Tank, Add Oil
When removing the oil filler cap, oil may spurt out, so turn the cap slowly to release the internal pressure
before removing the cap.
1. If the work equipment is not in the condition shown in the
diagram on the right, start the engine, run the engine at low
speed, retract the arm and bucket cylinder rods fully, then
lower the boom, set the bucket teeth in contact with the
ground, and stop the engine.
2. Within 15 seconds after stopping the engine, move each
control lever (for work equipment and travel) to the full
stroke in all directions to release the internal pressure.
3. Check sight gauge (G) from the right window installed to
the operator's compartment. The oil level should be
between the H and L lines.
NOTICE
Do not add oil above the H line. This will damage the
hydraulic circuit or cause the oil to spurt out. If oil has
been added to above the H level, stop the engine and wait
for the hydraulic oil to cool down, then drain the excess oil
from drain plug (P).
4. If the oil level is below the L line, add oil through oil filler (F)
at the top of the hydraulic tank.
REMARK
The oil level will vary depending upon the oil temperature.
Accordingly, use the following as a guide:
Before starting operation: Between H and L levels
(Oil temperature 10 to 30°C)
Normal operation: around H level
(Oil temperature 50 to 80°C)
Check Working Lamp Switch
Turn the lamp switch to the ON position and check that the
working lamp light up.
If the lamps do not light up, there is probably a broken bulb or
disconnection in the wiring, so contact your Komatsu distributor
for repairs.
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WARNING
OPERATION