Komatsu HM400-1, Manual

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OPERATION
OPERATION
OPERATIONS, CHECKS AFTER STARTING ENGINE
BREAKING-IN THE MACHINE
CAUTION
Your Komatsu machine has been thoroughly adjusted and tested before shipment. However, operating the machine under severe
conditions at the beginning can adversely affect the performance and shorten the machine life.
Be sure to break-in the machine for the initial 100 hours (as indicated by the service meter).
During break-in operations, follow the precautions described in this manual.
Idle the engine for 5 minutes after starting it up.
Avoid operation with heavy loads or at high speeds.
Immediately after starting the engine, avoid sudden starts, sudden acceleration, unnecessary sudden stops, and
sudden changes in direction.
WARMING-UP OPERATION
NOTICE
Do not accelerate the engine suddenly until the warming-up operation has been completed.
Do not run the engine at low idling or high idling continuously for more than 20 minutes.
If it is necessary to continue 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. Immediately after starting the engine, do not operate the accelerator pedal or dump body for the time given
below. Even after this time has passed, avoid sudden acceleration of the engine for 5 minutes.
Normal temperature: 10 seconds
Cold temperature: 15 seconds or more
When first starting engine after changing engine oil or replacing engine oil filter: 20 seconds
2. After the warming-up operation, check that the machine monitor is normal.
If there is any abnormality, carry out maintenance or repair.
When the AISS LOW switch is at the AUTO position and the engine water temperature is still low, high idling
revolution is automatically maintained.
3. Check if there is no abnormality in the steering operation, flashing of lights, sound of horn, exhaust gas color,
noise, or vibration. If any abnormality is found, repair it.
CANCELING DUMP BODY HOLD CONDITION
WARNING
If the HOLD is canceled when the dump body is raised, the body will go down under its own weight. This is very dangerous.
Always lower the dump body before stopping the engine.
After the engine has been started, if the dump lever is operated to HOLD, the dump body is held in position until the
lever is operated to FLOAT, RAISE, or LOWER.
After starting the engine, the body pilot lamp lights up, so operate the dump lever from HOLD to FLOAT to cancel
the body hold condition. With this operation, when the dump body moves to the FLOAT condition, the body pilot
lamp goes out.
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