TM 9-2320-209-20-3-4 23-25. VAN BODY PERSONNEL HEATER ASSEMBLY AND M109A3). TOOLS: Flat-tip screwdriver Open end wrench set, pn GGG-W-636 1/2-gallon container SUPPLIES: None PERSONNEL: One EQUIPMENT CONDITION: Truck parked, engine a. Preliminary Procedures. REPAIR (TRUCKS M109A2 off, handbrake set. (1) Make sure van body personnel heater is off and cool. (2) Disconnect battery ground cable. Refer to Part 1, para 7-58. b. Removal. FRAME 1 1. Using wrench, unscrew and take off capscrew (1) and cover (2). GO TO FRAME 2 23-87