Komatsu PC15MRX-1 Operation And Maintenance Manual page 89

OPERATION
WARMING-UP OPERATION
NOTICE
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.
Do not suddenly accelerate the engine before the
warming-up operation is completed.
Do not run the engine at low idling or high idling con-
tinuously 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. Pull fuel control lever (1) to the center position between
LOW IDLING and HIGH IDLING and run the engine at
medium speed for about 5 minutes with no load.
REMARK
When the ambient temperature is below 0°C (32°F), keep the
fuel control lever close to the 1/4 position when carrying out the
warming-up operation.
2. Set safety lock lever (2) to the FREE position, and raise
the bucket from the ground.
3. Operate bucket control lever (3) and arm control lever (4)
slowly to move the bucket cylinder and arm cylinder to
the end of the stroke.
MACHINE OPERATIONS AND CONTROLS
3-35