TM 9-2320-209-20-3-1 4-14. MANIFOLD HEATER (TOP-MOUNTED, UNCOVERED) SPARK PLUG REMOVAL AND REPLACEMENT (TRUCKS WITH ENGINES LDS 427-2 AND LDS 465-l). TOOLS : 3/4-inch wrench 7/8-inch wrench SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine off, handbrake set. a. Preliminary Procedure. Open hood and right side panel. Refer to TM 9-2320-209-10 b. Removal. 1. Using 3/4-inchwrench, unscrew and take off coupling nut (l). 2. Using 7/8-inchwrench, unscrew and takeoff sparkplug (2). Takeoff gasket (3). END OF TASK TA 086458 4-75