Komatsu WA600-8 Operation & Maintenance Manual page 181

OPERATION
The parking brake switch is used to apply and release the park-
ing brake.
(a) ON position
The parking brake is applied.
When the parking brake switch is set to ON position (a), the
parking brake pilot lamp lights up on the machine monitor.
When the parking brake switch is shifted to ON position (a), if
the directional lever or directional selector switch is in the posi-
tion other than NEUTRAL position (N), the centralized warning
lamp lights up and the alarm buzzer sounds intermittently.
(b) OFF position
The parking brake is released.
REMARK
If the engine is stopped when the parking brake switch is set to
OFF position (b), the parking brake is applied automatically.
When starting the engine again, set the parking brake switch to
ON position (a), and then set it back to OFF position (b) to re-
lease the parking brake.
SECONDARY PARKING BRAKE RELEASE SWITCH
The machine may move when the secondary parking brake release switch is set to "RELEASE" posi-
tion.
For setting the secondary parking brake release switch to "RELEASE" position, see "METHOD FOR RE-
LEASING PARKING BRAKE WITH SECONDARY PARKING BRAKE RELEASE SWITCH (3-285)".
The secondary parking brake release switch is used to release
the parking brake when the machine become immobile for
some reason.
(a) Release
When abnormal (switch is set to upper position)
(b) Normal
When normal (switch is set to lower position)
MODULATION CLUTCH ENGAGEMENT SWITCH
The modulation clutch engagement switch is used to engage
the clutch when the modulation clutch does not operate and the
machine cannot travel for some reason.
(a) Connect
When abnormal (switch is set to upper position)
(b) Normal
When normal (switch is set to lower position)
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WARNING
EXPLANATION OF COMPONENTS
3-113