Komatsu PC1250-11, Original Instructions Manual

Page: 175 / 452

• The fuse holder is at the rear of the operator's seat.
• The fuses protect the electrical component and wiring from
burning out.
• If the fuse becomes corroded, or looks white powdery, or
the fuse is loose in the fuse holder, replace the fuse.
• Replace the fuse with the one of the same capacity.
Fuse capacities and circuit names
No.
Fuse ca-
pacity
Name of circuit
(1) 10 A
Pump secondary drive switch, swing parking
brake cancel switch
(2) 10 A
Optional power supply (1), heater drain (if
equipped)
(3) 10 A
PPC oil pressure lock solenoid, starting motor
cut-off relay
(4) 20 A Window washer, cigarette lighter
(5) 10 A Horn, flash light
(6) 10 A Ribbon heater relay
(7) 10 A Revolving lamp (if equipped)
(8) 10 A Radio
(9) 10 A Hydraulically operated stairway (if equipped)
(10) 20 A
Air conditioner unit, air conditioner compres-
sor
(11) 10 A
Power supply for external devices (if equip-
ped)
(12) 10 A Machine push-up, boom vibration control
(13) 20 A
Optional power supply (2), 12 V power sup-
ply, seat heater, air suspension seat
(14) 5 A Air conditioner ECU power supply
(15) 10 A ACC (each controller)
(16) 10 A
Radio backup, room lamp, system operating
lamp
(17) 10 A
Staircase lighting, Hydraulically operated
stairway (if equipped)
(18) 10 A Walk-through lighting
(19) 5 A Air conditioner ECU backup
(20) 10 A Optional power supply (3)
(21) 10 A KDPF temperature sensor
OPERATION EXPLANATION OF COMPONENTS
3-109