OM3040 03/13 Operating Instructions - Section 30 Page 30-19 4. Use the tow eyes installed under the front frame/bumper for towing from the front of the disabled truck. Both tow hooks must be used. Use the tow pin on the rear axle when pulling the disabled truck from the rear. 5. If the engine of the disabled truck is operational, start the engine before towing to release the parking brake, and to enable steering and brak- ing functions. 6. If the engine is NOT operable, hydraulic power for steering, braking and transmission lubrica- tion will not be available. Install the necessary hydraulic connections between the towing vehicle and the disabled truck to provide hydraulic power.
Refer to Dis- abled Truck Steering and Braking. 7. If the body of the disabled truck contains a load, dump the load before towing. If the engine is not operational, refer to Disabled Truck Dumping. 8. Remove all blocking, and release the disabled truck brakes. Begin towing the disabled truck. The observer should signal the operators to stop the tow if any signs of danger or damage are evident. Do not exceed 2 km/h (1 mph) when towing another truck. Smooth and gradual truck movement is essential during towing. Sudden movement may cause wire rope failure leading to injury and/or truck damage. Minimize the tow angle at all times - Never exceed 10° in any direction, vertically or horizontally.
The towed truck must be steered in the direction of the wire rope. Consult your area Komatsu service representative for any questions or concerns about towing a dis- abled truck.