Komatsu PC490-11, Installation And Instruction Manual

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(12) 10 A Sensor power supply relay (2)
(13) 10 A DEF line heater relay (1)
(14) 20 A DEF line heater relay (2)
REMARK
• Spare fuses are installed in the back of the fuse holder lid
at the rear of the operator's seat.
• After using spare fuses, replenish them immediately.
• One spare fuse is installed for each 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 engine starting motor does not operate even when the
engine starting switch key is turned to START position, fusible
link (1) and (2) may be broken. Open the battery box cover on
the right side of the machine to check the fusible links, and re-
place them.
(1): Fusible link for 24 V power supply
(2): Fusible link for 24 V continuous power supply
Fusible link (2) is fixed to a near wiring harness with a tape.
When checking or replacing, confirm the wiring harness No.
REMARK
A fusible link refers to the large-sized fuse wiring installed in
the high current flowing part of the circuit.
It is provided to protect electrical components and wiring from
burning out, in the same way as an ordinary fuse does.
TOOL BOX
Store the tools in it.
This is installed in the battery box at right of the machine.
NOTICE
Do not put a tool so large that it reaches the battery in the
tool box.
This will cause the breakage of the battery.
EXPLANATION OF COMPONENTS OPERATION
3-112