TM 9-2330-390-14&P2-18. GENERAL TOWING INSTRUCTIONS.NOTEThe dolly set may be towed in a four-wheel configuration, with or without shelter.Two dolly sets without shelters may be towed in tandem for off public road use ONLY(see paragraph 2-19). Although towing arrangements and length of the overall unitmay differ, the same general principles of safe towing apply.M939 Series Cargo Trucks must be loaded with at least 3 tons of payload whentowing a fully loaded dolly set.There is no spare tire mounted on the dolly set. A spare must be obtained from thetowing vehicle or the motor pool.Refer to FM 21-305 for further information on safe towing practices.a. Driving.Steering locking pin MUST be removed from front axle and steering link before dollyset is towed in a four-wheel configuration. Failure to unlock steering will damagesteering linkage and may result in an accident.(1)Check to ensure steering locking pin has been placed in stowed position in front axle stowage tube(see paragraph 2-11).(2)Keep in mind the overall length of towing vehicle and dolly set (with or without shelter) whenpassing other vehicles, turning, stopping, and backing.(3) Do not exceed maximum towing speed for towing configuration and road surface (seeparagraph 1-15).A ground guide should be used when towing vehicle driver is maneuvering in tightturns over 180°. In turns over 180°, towing vehicle may contact dolly set tires. Failureto follow this caution may cause damage to dolly set.b.Turning. When turning comers, remember that dolly set wheels turn inside the turning radius of towingvehicle. Make a right turn by driving towing vehicle approximately halfway into intersection, then cutting sharply to theright. This will keep dolly set wheels off curb.c.Stopping. During normal operation, brakes of towing vehicle and dolly set are applied at the sametime.Apply brakes gradually and smoothly.d.Parking. When leaving towing vehicle and dolly set unattended, set parking brakes on towing vehicleand rear dolly, or rear dollies if tandem towing.e. Backing.(1)When dolly set must be backed up in a straight line without turning, steering locking pin should beinstalled in front axle and steering link to lock steering. When dolly set must be turned while backing up, steeringlocking pin must be removed and stowed, to unlock steering.2-120
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