Komatsu H75051, Operation & Maintenance Manual

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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
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 blown. 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 as shown in the figure.
Remove the cover (1), open the cover (2), and check the slow-
blow fuse.
If any trouble occurs on the slow-blow fuse, replace the slow-
blow fuse by referring to “MAINTENANCE”, “METHOD FOR
REPLACING SLOW-BLOW FUSE”.
Slow-blow fuse
(A) 80 A: Machine's power supply 1
(B) 120 A: Machine's power supply 2
(C) 120 A: Engine preheater power supply
(D) 80 A: Battery power supply (starting switch, hazard)
FRAME LOCK BAR
k k
WARNING
• When performing the maintenance or transporting the machine, always set the frame lock bar to
LOCK position.
• When driving the machine, always set the frame lock bar to FREE position.
If the frame lock bar is not in FREE position, the steering becomes inoperative and this may lead to
serious personal injury or death.
EXPLANATION OF COMPONENTS OPERATION
3-118