Komatsu WA500-6H Operation & Maintenance Manual page 132

3.2 Explanation of components
36. Emergency parking brake cancel switch
WARNING
When the emergency parking brake cancel switch is released,
the machine may move.
When releasing the emergency parking brake switch, see
"Method of releasing brake by using emergency parking brake
cancel switch (3-177)".
If the engine will not start for some reason, use this switch (36)
to release the parking brake. Please contact your KOMATSU
distributor to have the brake released.
Position (a): Release
Position (b): Normal position
37. Room lamp switch
The switch (37) is used to turn the room lamp ON and OFF.
Position (a): OFF
Position (b): Lights up when the cab door opens
Position (c): Lights up
REMARK
The room lamp lights up even when the main switch is OFF, so
when leaving the operator's compartment, turn the switch to
position (a) (OFF) or (b).
When operating with the cab door fully open, set the switch to
position (a) (OFF).
3-66
EMERGENCY P/BRAKE
RELEASE
P/BRAKE
RELEASE
NORMAL
POSITION
a
b
c
WA500-6H – VEAM430100
Operation
GK050077
GK050078