Komatsu PW118MR-11, Operation & Maintenance Manual, Page: 201 / 462

REMARK
• Spare fuses are installed in the back of the fuse holder lid
at the rear left of the operator's seat.
• If the spare fuses are used, replace the missing fuses im-
mediately.
• One spare fuse is supplied for each type 5 A, 10 A, 20 A,
25 A, and 30 A.
FUSIBLE LINK
NOTICE
Before replacing a fusible link, be sure to turn the starting
switch to OFF position, then turn the battery disconnect
switch key to OFF position.
If the following phenomena occur, fusible links are suspected of
disconnection. Open the rear lefthand hatch, check the power
fuse and replace it if necessary.
• If the engine starter motor does not function even if the key
in the starting switch is turned to the START position, the
power fuse (1) may have blown.
• If the battery runs flat, the power fuse (2) may have blown.
• If the engine does not start easily in cold weather even if the starting switch is set to HEAT (preheat) posi-
tion, fusible link (3) may be broken.
REMARK
A power fuse is a high capacity fuse installed in the power section of the electrical circuit.
It protects the electrical components and wiring from burning, as guaranteed by a standard fuse.
Item Capacity Name of circuit Connector No. Part No.
(1) 65 A Standard power supply F02 22U-06-11270
(2) 65 A DC power supply F03 22U-06-11270
(3) 120 A Preheating F06 421-06-22830
CONTROL UNITS
NOTICE
• Do not let water, mud, or beverage spill on the control-
ler. This will cause failures.
• If any problem occurs in the controller, do not repair it
by yourself. Contact your Komatsu distributor for re-
pair.
(1) KomVision control unit
(2) Komtrax control unit
(3) Pump control unit
(4) Machine control unit
(5) Engine control unit
RKA65010
OPERATION EXPLANATION OF COMPONENTS
3-129
WENAM00130