Komatsu WA500-6H Operation & Maintenance Manual page 119

Operation
11. Parking brake switch
WARNING
Always apply the parking brake when leaving the machine or
when parking it.
Even if the parking brake switch is turned ON, there is danger
until the parking brake pilot lamp lights up, so keep the brake
pedal depressed.
NOTE
Never use the parking brake switch to apply the brakes
when traveling, except in an emergency. The parking brake
may be damaged and this may lead to a serious accident.
Apply the parking brake only after the machine has stopped.
If the parking brake has been used as an emergency brake
when traveling at high speed, contact your KOMATSU dis-
tributor to have the parking brake checked for any abnormal-
ity.
This switch (11) operates the parking brake.
Position (a): ON
The parking brake is applied, and the parking brake pilot lamp
lights up.
Position (b): OFF
The parking brake is released.
REMARK
If the directional lever is placed in F (FORWARD) or R
(REVERSE) with the parking brake applied, the warning lamp
will flash and the alarm buzzer will sound.
If the machine is left with the engine stopped but the parking
brake switch is at the "OFF" position, or if the starting switch is at
the "OFF" position and the parking brake switch is set to the
"OFF" position, when the starting switch is turned to the "ON"
position, the parking brake is applied even if the parking brake
switch is at the "OFF" position. If this happens, after starting the
engine, turn the parking brake switch to the "ON" position, then
to the "OFF" position to release the parking brake.
The machine does not start when the directional lever is oper-
ated with the parking brake applied.
WA500-6H – VEAM430100
3.2 Explanation of components
a b
GK050055
3-53