TM 9-2320-209-34-2-2 17-50. VERTICAL LEVELING WORM GEAR AND HOUSING REMOVAL, REPAIR, REPLACEMENT, AND ADJUSTMENT (TRUCK M764). TOOLS: No special tools required SUPPLIES: Safety wire, 0.047 inch diameter Artillery and automotive grease, type GAA, MIL-G-10924 Lubricating oil, ICE, OE /HDO 10, MIL-L-2104 Solvent, dry cleaning, type II (SD-2), Fed. Spec PD-680 PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. Preliminary Procedure. Remove vertical leveling worm drive chains. Refer to TM 9-2320-209-20. 17-609