TM 9-2320-209-34-2-2 17-48. MAIN DRIVE IDLER GEAR ASSEMBLY REMOVAL, REPAIR, AND REPLACEMENT (TRUCK M764). TOOLS: No special tools required SUPPLIES: Artillery and automotive grease, type GAA, MIL-L-2104 Lubricating oil, ICE, OE/HDO 10, MIL-L-2104 Solvent, dry cleaning, type II (SD-2), Fed. Spec P-D-680 Idler gear housing-to-clutch case gasket Bearing and seal retainer-to-idler gear housing gasket (2) Oil seal Flange gasket PERSONNEL: Two EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedures. (1) Remove earth boring machine. Refer to para 17-46. (2) Drain oil from main drive idler gear housing. Refer to LO 9-2320-209-12/1. 17-568