Komatsu D155A-6 Operation & Maintenance Manual page 114

OPERATION
CIRCUIT BREAKER
If the engine does not start up when the starting switch is turned
to the ON position, open up the battery cover and check the
battery.
If excessive current flows through the circuit breaker, it cuts off
the electric circuit to prevent damage to the electrical
components and wiring.
To restore the electric circuit after it has been cut off, push in
reset button (9). (This springs out when the circuit is cut off.)
If the electric circuit is normal, reset button (9) will stay pushed
in. If it comes out immediately when it is pushed in, the electric
circuit must be checked.
Fuse
No
capasity
(1) 20A
(2) 20A
(3) 20A
(4) 20A
(5) 20A
(6) 20A
(7) 20A
(8) 20A
REMARK
The circuit breaker is a device installed in electric circuits where a large current flows. It is installed to protect the
electric circuit. It protects the electric components and wiring from damage caused by an abnormal current in the
same way as a normal fuse. After repairing and restoring the location of the abnormality, there is no need to replace
the breaker. It can be used again.
Circuit
Permanently ON power source
Starting switch
Rear lamp
Front lamp
Air conditioner
Work equipment controller
Power train controller
Option
EXPLANATION OF COMPONENTS
3 - 63