Komatsu PW160-7H Operation & Maintenance Manual page 115

OPERATION CONTROL LEVERS, PEDALS
Depending upon the specification the service brake pedal may be
of the alternative design shown.
37
The service brakes are operated by depressing pedal (37). The
service brakes can be locked in the 'ON' position for digging and
A
lifting operations, to lock the service brakes in the 'ON' position
fully depress the brake pedal. To unlock the service brakes
B
depress latch (A).
For on highway driving the lock can be disabled. Depress latch
Alternative
(A) fully. This will prevent the lockfrom operating when the brake
pedal (37) is depressed. When the lock as needing again depress
latch (B)
PW160-7H VEAM390100 115