Structure, Function And Maintenance Standard - Komatsu WA250-6 Shop Manual

WHEEL LOADER
WA250-6
WA250PZ-6
Machine model
WA250-6
WA250PZ-6
10 Structure, function and
maintenance standard
920 Electrical system, Part 2
Electrical system (HST controller system) ...................................................................................................... 2
HST controller ............................................................................................................................................... 18
ECSS system................................................................................................................................................ 20
KOMTRAX system........................................................................................................................................ 22
Engine starting circuit.................................................................................................................................... 24
Engine stopping circuit.................................................................................................................................. 26
Preheating circuit .......................................................................................................................................... 27
Engine output derating function .................................................................................................................... 28
Automatic warm-up function ......................................................................................................................... 28
Parking brake circuit ..................................................................................................................................... 29
Coupler plunger control system .................................................................................................................... 32
Multi-function knob........................................................................................................................................ 33
Max. traction switch ...................................................................................................................................... 34
Sensor........................................................................................................................................................... 35
WA250, 250PZ-6
Serial number
75001 and up
75001 and up
SEN03834-01
10
1
10-920