Operating Instructions - Section 30 7/09 OM3050 Page 30-22 10. Ensure the operator in the towing vehicle has 2- way radio communications with the driver in the disabled truck. 15. When the desired location has been reached, the operator in the towed vehicle is to apply the service brakes, then turn switch (1) to the OFF position. This will apply the parking brakes. 11. When ready to tow the disabled truck, remove blocking from the wheels. 16. Block the wheels on the towing vehicle and the disabled truck to prevent roll-away. 12. The operator in the disabled truck should now move switch (1, Figure 30-3) to the ON position. This will release the parking brakes. 17.
Shut down the engine in the towing vehicle. Disconnect the hydraulic hoses. 13. Tow the disabled truck. Sudden movement may cause tow bar failure. Smooth, gradual truck movement is preferred. Do not tow the truck any faster than 8 kph (5 mph). 18. Disconnect special wiring harness (3) from the truck. Connect the truck wiring harness back to the parking brake solenoid. 19. Disconnect the tow bar. 14. Minimize the tow angle at all times. Never exceed 30 degrees. The towed truck must be steered in the direction of the tow bar.