Komatsu HM400-5, Operation & Maintenance Manual

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2.
Turn secondary steering switch (1) ON.
3.
Turn the steering wheel and check that the steering is op-
erated.
If the steering is not operated when the steering wheel is
turned, ask your Komatsu distributor for repair.
METHOD FOR CHECKING AUTOMATIC SECONDARY STEERING
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WARNING
Do not use the secondary steering motor for more than 90 seconds.
If it is used continuously for more than that, motor may get burn out or get damaged, or that it may
cause a fire.
1.
Turn the starting switch to START position and start the engine.
2.
Check that the brake oil pressure caution lamp is turned OFF.
3.
Pull retarder control lever (2) fully.
4.
Stop the engine.
5.
Turn the starting switch key to ON position.
6.
Set parking brake switch (3) to “TRAVEL” position, and
check that the secondary steering motor operates in 1 sec-
ond.
7.
After checking set parking brake switch (3) to “PARKING”
position.
8.
Turn the starting switch to OFF position.
REMARK
While the secondary steering motor is in operation, secondary
steering pilot lamp (4) lights up.
If the secondary steering motor operates 1 minute or longer,
secondary steering motor long-operation caution lamp (5) lights
up.
Do not operate the secondary steering motor for a long time.
METHOD FOR CHECKING BACKUP ALARM OPERATION
1.
Turn the starting switch to ON position.
2.
Place the gear shift lever in R position and check that the backup alarm sounds.
3.
After checking, return the starting switch to OFF position.
METHOD FOR CHECKING HORN OPERATION
1.
Turn the starting switch to ON position.
OPERATION MACHINE OPERATIONS AND CONTROLS
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