Komatsu PC400LC-5 Operation & Maintenance Manual page 91

12.3 OPERATIONS AND CHECKS AFTER
STARTING ENGINE
l Emergency stop
If there has been any abnormal actuation or trouble, turn the
starting switch key to the OFF position.
l If the work equipment is operated without warming the
machine up sufficiently, the response of the work equipment
to the movement of the control lever will be slow, and the
work equipment may not move as the operator desires, so
always carry out the warming-up operation. Particularly in
cold areas, be sure to carry out the warming-up operation
fully.
12.3.1 WHEN NORMAL
NOTICE
l When the hydraulic oil is at a low temperature, do not carry out
operations or move the levers suddenly. Always carry out the
warming-up operation. This will help to extend the machine life.
l Do not suddenly accelerate the engine before the warming-up
operation is completed.
Do not run the engine at low idling or high idling continuously
for more than 20 minutes. This will cause leakage of oil from the
turbocharger oil supply piping. If it is necessary to run the
engine at idling, apply a load from time to time or run the engine
at a mid-range speed.
After starting the engine, do not immediately start operations.
First, carry out the following operations and checks.
1. Turn fuel control dial @ to the center position between LOW
IDLING (MINI and HIGH IDLING (MAX) and run the engine at
medium speed for about 5 minutes with no load.
2. While running the engine at medium speed, press working mode
switch @ until the heavy-duty operation mode lamp is turned on.
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