TM 9-2320-209-34-2-2 17-49. HORIZONTAL LEVELING WORM GEAR AND HOUSING ASSEMBLY REMOVAL, REPAIR, AND REPLACEMENT (TRUCK M764). TOOLS: Worm adjusting bearing wrench, pn 11623222 SUPPLIES: Safety wire, 0.047-inch diameter Solvent, dry cleaning, type II (SD-2), Fed. Spec P-D-680 Cotter pin (4) PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. to Preliminary Procedure. Remove horizontal leveling worm drive chains. Refer TM 9-2320-209-20. 17-586