Komatsu H70051 Series Operation & Maintenance Manual page 184

EXPLANATION OF COMPONENTS
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
• 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.
This is a device used to lock the front and rear frames to pre-
vent the machine from being articulated during the mainte-
nance or transporting the machine.
(L) LOCK position
It is used for maintenance and transportation
The front frame and the rear frame are locked so that the ma-
chine body is not articulated.
(F) FREE position
It is used for normal operation.
The machine body is articulated.
METHOD OF USING TOWING PIN
3-118
k k
WARNING
OPERATION