Komatsu GD555-5 Operation & Maintenance Manual page 158

OPERATION
Emergency stop
If the operation is abnormal or any other trouble occurs, turn the key in the starting switch to the OFF position.
If the work equipment is operated without warming up the machine sufficiently, the response of the work equipment to the
movement of the control lever will be slow. The work equipment may not move as the operator desires. Follow all warm-up
procedures. Particularly in cold areas, make sure to warm up the machine properly.
NORMAL OPERATION
After starting the engine, do not immediately start operations. First, perform the following operations and checks.
NOTICE
Do not accelerate the engine suddenly until the warming-up operation has been completed.
Do not run the engine at low idle or high idle continuously for more than 20 minutes.
If it is necessary to continue to run the engine at idle, apply a load from time to time or run the engine at a mid-range speed.
1. Always wait for the warming-up operation to be completed
(until the engine idle speed is reduced from 1100 rpm to the low
idle speed of 800 rpm).
2. After completing the warming-up operation, check that the
gauges and caution lamps work properly.
If any problem is found, carry out maintenance or repair.
Run the engine under low load until engine water temperature
gauge (1) enters the green range.
3. Check for abnormal exhaust gas color, noise, or vibration. If
any problem is found, contact your Komatsu distributor.
WARNING
OPERATION
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