TM 9-2320-209-10-1 c. Towing the Truck to Start Engine. PERSONNEL: TWO FRAME 1 CAUTION Do not try to tow a disabled truck with two chains wrapped around center of bumper. This may cause damage to bumper. Be sure that service brakes are operating properly before towing. NOTE Approval from maintenance officer must be obtained before towing your truck to start engine. 1. Hook each end of tow chain (1) to lifting shackles (2) of truck to be towed. Chain should be long enough for both trucks to be able to move around. 2. Slip center of tow chain into pintle (3) of towing truck. 4-423