Komatsu PC88MR-10 Shop Manual page 511

1. Set the work equipment in the posture A or B
shown in the below figure, and stop the engine,
check the oil level, and add new oil if necessary.
a State A
1) Start the engine, run it at low idle.
2) Lower the blade end to the ground.
3) Retract the cylinder for arm and bucket.
4) Set the boom at the center position.
5) Lower the boom so that the bucket tooth
contacts to the ground.
6) Stop the engine.
a State B
1) Start the engine, run it at low idle.
2) Lower the blade end to the ground.
3) Extend the arm and bucket cylinder.
4) Set the boom at the center position.
5) Set boom at full RAISE position.
6) Stop the engine.
2. Check the oil level with sight gauge (G) on the
inspection window of the R.H. cover.
If the oil level is within the range shown below, it
is correct.
State A: Within range a
State B: Within range b
If the oil level is below L mark, open the soil
cover, and add oil through the oil filler port (F)
until the oil level comes between H mark and L
mark of sight gauge (G).
PC88MR-10
Related information on troubleshooting
a Be careful not to add oil any higher than H
mark since it can damage the hydraulic
circuit or allow spurt of oil.
a If oil level is above H mark, stop the engine,
wait for the oil temperature to cool down,
discharge excessive oil from drain plug (P)
under the hydraulic tank.
The oil level changes corresponding to the oil
temperature, use the followings as a guide when
checking it.
Before staring operation (oil temperature: 10
to 30°C), the oil level should be near L mark.
During normal operation (oil temperature: 50
to 80°C), the oil level should be near H mark.
3. Pressurize the pressure in the hydraulic tank by
performing the steps described below when oil is
added with state B.
40 Troubleshooting
40-23