Komatsu WA380-8, Operation & Maintenance Manual, Page: 186 / 432

Fuse box C
No.
Fuse
capacity
Name of circuit
(1) 20 A Smart sensor
(2) 10 A Smart sensor
(3) 10 A DEF heater
(4) 20 A DEF heater
(5) 10 A Spare
SLOW-BLOW FUSE
NOTICE
When replacing the slow-blow fuse, be sure to turn the starting switch to OFF position and, after con-
firming that the system operating lamp is not lit, set the battery disconnect switch key to OFF position.
When the starting switch is turned to ON position, if the power
is not supplied, the slow-blow fuse may be broken. Check the
slow-blow fuse and replace it if necessary. Check or replace it.
The slow-blow fuse is on the side of the engine on the left side
of the machine.
Slow-blow fuse
(1) 50 A: Continuous power supply
(2) 80 A: Main power supply 1
(3) 50 A: Main power supply 2
(4) 120 A: Charge circuit
(5) 120 A: Heater relay (ribbon heater)
FRAME LOCK BAR
k k
WARNING
• When performing maintenance or transporting the machine, always set the frame lock bar to LOCK
position.
• Always disengage the frame lock bar when traveling. If it is not disengaged, the steering wheel be-
comes inoperative and this may lead to serious personal injury or death.
This is a device used to lock the front and rear frames to pre-
vent the machine from articulating during maintenance or trans-
porting the machine.
(L) LOCK position:
The front and rear frames are locked and the machine does not
articulate. Set the bar to this position for inspection and mainte-
nance during maintenance or transporting the machine.
(F) FREE position: Set the bar to this position for normal opera-
tion.
METHOD OF USING TOWING PIN
EXPLANATION OF COMPONENTS OPERATION
3-122