Engine Starting Circuit - Komatsu WA250-6 Shop Manual

SEN03834-01

Engine starting circuit

1. Battery
2. Battery relay
3. Slow-blow fuse
4. Fuse box 1
5. Fuse box 2
6. Starting switch
7. Directional lever
8. Neutral safety relay
9. KOMTRAX engine cut-out relay
10. HST controller power holding relay
11. Starting motor safety relay
12. Starting motor
13. Alternator
14. HST controller
15. Engine controller
16. Machine monitor
17. KOMTRAX terminal
18. Engine controller cut-out relay
19. CAN resistor
20. Directional selector switch operating switch
21. Directional selector switch
24
10-920
Function
1. The neutral safety circuit is employed to
secure safety when the engine is started.
The engine can not be started while the
q
directional lever is at any position other
than N (neutral).
When the directional selector switch oper-
q
ating switch is turned "ON", the directional
lever and the directional selector switch
must be at "N (neutral)" to start the
engine.
2. The KOMTRAX engine cut-out circuit is
employed to disable the engine from starting
when the KOMTRAX terminal receives an
engine cut command issued through external
operation.
920 Electrical system, Part 2

Engine starting circuit

WA250, 250PZ-6
1