Komatsu WA20-2, Operation & Maintenance Manual

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4. SAFETY LOCK (for work equipment control lever)

WARNING
‡ When leaving the operator's compartment, set the safety lock
securely to the LOCK position. If the control lever are not
locked, and they are touched by mistake, this may lead to a
serious accident.
‡ If the safety lock is not placed securely in the LOCK position,
the control lever may not be properly locked. Check that the
situation is as shown in the diagram.
‡ When parking the machine or carrying out maintenance,
always lower the bucket to the ground and apply the lock.
This is used to lock the work equipment lever.
Push the knob to apply the lock.
5. BRAKE PEDALS

WARNING
‡ Do not use the brake pedals repeatedly unless necessary.
‡ Do not put your foot on this pedal unless necessary.
There are brake pedals on both the left and right sides. Both the
left and right pedals have the same function. When the brake pedal
is depressed, the machine is stopped.
The brake pedal is interconnected with the HST inching valve,
so if the brake pedal is depressed lightly, the HST pump returns in
the neutral direction in accordance with the amount the pedal is
depressed, and this gives a deceleration effect. If the pedal is
depressed further, the wheel brake is actuated and the machine is
stopped.
6. ACCELERATOR PEDAL
This pedal controls the engine speed and output.
The engine speed can be freely controlled between low idling
and full speed.
11. EXPLANATION OF COMPONENTS 11. EXPLANATION OF COMPONENTS