Komatsu WA20-2, Operation & Maintenance Manual

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12. OPERATION 12. OPERATION
CHECK PARKING BRAKE ALARM BUZZER
Check that the alarm buzzer sounds when the engine is stopped
with the parking brake not applied.
CHECK EFFECT OF PARKING BRAKE AND PEDAL STROKE
Depress the parking brake pedal and check that the parking brake
pilot lamp lights up after 1 – 2 notches and that the parking brake
pedal moves 4 – 7 notches when depressed fully.
If the above value is not correct, or if the braking effect is poor,
see “24.2 WHEN REQUIRED”.
CHECK TRAVEL OF PARKING BRAKE RELEASE LEVER
Depress the parking brake pedal 3 – 4 notches, then pull the
release lever and check that the parking brake pedal returns to its
original position.
The travel of the lever after the brake is released should be 35
– 50 mm (1.4 – 2 in).
If the above value is not correct, see “24.2 WHEN REQUIRED”.
CHECK EFFECT OF BRAKE AND PEDAL STROKE
The travel at the tip of the pedal should be 60 – 85 mm (2.4 – 3.4
in).
If the travel is not within the standard range, or the braking effect
is poor, see “24.2 WHEN REQUIRED”.
CHECK STEERING WHEEL PLAY AND OPERATION OF STEERING
The play at the outside circumference of the steering wheel
should be 20 – 40 mm (0.8 – 1.6 in).
If it is more than 40 mm (1.6 in) or the operation of the steering
is not smooth, please contact your Komatsu distributor for inspec-
tion.