TM 9-2320-361-10 1-25. PIPELINE CONSTRUCTION MAINTENANCE TRUCK, W/W: M756A2 Purpose of the \’chicle. The M756A2 pipeline construction maintenance truck is used to load, unload, and transport pipe and pipeline construction equipment, An A- frame, side racks, bows, and tarpaulin are included with the vehicle. Side racks have built-in troop seats for transporting pipeline construction personnel. Body side panels can be removed for side mounting of A-frame. All M756A2 trucks have front and rear-mounted winches PIPELINE CONSTRUCTION MAINTENANCE TRUCK (M756A2) 1-26. EARTH BORING AND POLESETTING MAINTENANCE TRUCK, W/W: M764 Purpose of the Vehicle. The M764 earth boring and polesetting maintenance truck uses an auger to bore holes and a derrick and rear winch to set and pull poles. A collapsible (’able reel is used to lay wire and light cable. Hydraulically operated outriggers are used to steady vehicle for cart h boring and polesetting operations. All M764 trucks have front-and rear-mounted winches. 1-12 EARTH BORING AND POLESETTING MAINTENANCE TRUCK (M764)