Komatsu WA380-6 Operation & Maintenance Manual page 225

TROUBLESHOOTING
When towing a machine downhill, it may be necessary to connect another machine to the rear of the machine
being towed in order to provide ample rimpull and braking power. This makes it possible to prevent the machine
from losing control.
Towing may be carried out under various differing conditions, so it is impossible to determine beforehand the
requirements for towing. Towing on flat horizontal roads will require the minimum rimpull, while towing on slopes
or on uneven road surfaces will require the maximum rim pull.
Connect a wire rope to the part indicated with the arrow in the
diagram at right.
WHEN ENGINE CAN BE USED
If the transmission and steering wheel can be operated, and the engine is running, it is possible to tow the
machine out of mud or to move it for a short distance to the edge of the road.
The operator should sit on the machine being towed and operate the steering in the direction that the machine
is towed.
WHEN ENGINE CANNOT BE USED
When towing a machine with the engine stopped, use the following procedure.
1. The transmission oil does not lubricate the system, so remove the front and rear drive shafts. If necessary, block
the tires to prevent the machine from moving.
2. The steering cannot be operated, so remove the steering cylinder.
Even if the brakes are in good condition, the brakes can only be used a limited number of times. There is no
change in the operating force for the brake pedal, but the braking force is reduced each time the pedal is
depressed.
3. Connect the towing equipment securely. When carrying out towing operations, use two machines of at least the
same class as the machine being towed. Connect one machine each to the front and rear of the machine being
towed, then remove the blocks from the tires and tow the machine.
4. Parking brake
The parking brake cannont be turned OFF. To release the parking brake, do as follows.
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OPERATION