Main power supply circuit breaker
• If the starting motor does not operate when the starting
switch is turned to the START position, open the battery
cover on the left side of the machine and check circuit
breakers (A) and (B) of the main power supply.
(A) and (B) are used as the reset buttons, as well.
• The circuit breaker cuts out the electrical circuit to protect
the electrical parts and wiring when an overcurrent is gen-
erated.
• To restore the cut out electrical circuit, turn the starting
switch to OFF position, wait for 5 to 10 minutes, and push
the reset button.
If the electrical circuit is cut out, the operating effort of the reset button is heavier than when the electrical
circuit is operating normally.
The height of the reset button does not change when the electrical circuit is cut out or operating normally.
Check the restoration of the circuit by the operating effort of the reset button.
• Do not hold down the reset button of the circuit breaker for a long time.
• If the starting motor does not operated after the circuit breaker is restored, contact your Komatsu distributor.
REMARK
The capacities of circuit breakers (A) and (B) are as follows.
(A): 60 A (for continuous power supply)
(B): 105 A (for general power supply)
FIRE EXTINGUISHER
(if equipped)
A fire extinguisher is provided at the rear part inside the opera-
tor's cab.
The directions are described on the nameplate affixed to the
fire extinguisher. Carefully read and understand them before-
hand for an emergency.
BATTERY DISCONNECT SWITCH
k
k
CAUTION
• If the battery disconnect switch is turned to OFF position, always remove the switch key.
If someone turns the key to ON position carelessly, this is extremely dangerous.
• Do not operate the battery disconnect switch while the engine is running.
The large current generated by the alternator may burn the electric parts and cause a fire.
Engine must be stopped while operating the battery disconnect switch.
OPERATION
EXPLANATION OF COMPONENTS
3-111
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