Operation - Section 3 OM3006.1 04/98 Page 3-10 Operating Instructions TOWING Prior to towing a truck, many factors must be carefully considered. Serious personal injury and/or significant property damage may result if important safety prac- tices, procedures, and preparation for moving heavy equipment are not observed. 5. Release disabled truck brakes and remove all blocking. Towing a disabled truck requires a rigid tow bar capa- ble of towing at least 1.5 times the Gross Vehicle Weight (GVW) of the vehicle being towed. NEVER use cable for towing a disabled vehicle ! Do not tow the truck any faster than 8 kph (5 MPH). 6. Sudden movement may cause tow bar failure.
Smooth and gradual truck movement is preferred. When towing becomes necessary, use the tow eyes installed under the front frame/bumper and take the following precautions: 7. Minimize tow angle at all times - NEVER EXCEED 30 o . The towed truck must be steered in the direction of the tow bar. 1. Block disabled truck to prevent movement while preparing truck for towing and attaching tow bar. Inspect tow bar for capacity (it must be capable of towing at least 1.5 times the Gross Vehicle Weight of vehicle being towed). 2. Determine primary reason that vehicle is disabled. a.
If truck is disabled because of a suspected final drive problem, both right and left planetary sun gears/drive axles should be removed before any towing. (Refer to Section ‘‘G’’, Final Drive, in the Shop Manual for procedure.) Extensive secondary damage can occur to final drive components and/or transmis- sion, if truck is towed without first removing sun gears/drive axles . b. If truck is disabled because of a suspected transmission problem, and the towing distance surpasses 800m (2,625 ft), remove the drive shaft between the transmission and the differ- ential case (if final drive sun gears have not been removed). c.
If the engine of the disabled truck is operable; keep the engine running while towing, so that the steering and braking can be used. d. If the engine is NOT operable, hydraulic power for steering and braking and transmission lubri- cation will not be available. Install the necessary hydraulic connections be- tween the towing vehicle and the disabled truck to provide hydraulic power for steering and braking. (Refer to the decals on the truck near the hydraulic manifold.) Disconnect transmission as stated above. 3. Determine that towing vehicle has adequate ca- pacity to both move and stop the towed truck under all conditions. 4. Protect both operators in the event of tow bar failure.