TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
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TM 9-2320-387-24-1 4-6 Change 1 4-4. PROTECTIVE CONTROL BOX (PCB) REPLACEMENT This task covers: a. Removal b. Installation CAUTION The control box must be supported from inside the vehicle during removal and installation. Failure to do this may result in damage to Protective Control Box (PCB). 1. From inside the vehicle, disconnect body wiring harness cannon plug (4) from PCB (5). 2. Working under hood, disconnect engine wiring harness cannon plug (6) from PCB connector (7). NOTE Perform step 3 for M1114 vehicles. Perform step 4 for M1113 vehicles. 3. Remove four screws (5.1) and PCB (5) from cowl (3). 4. Remove four nut and lockwasher assemblies (1) and PCB (5) from cowl (3). Discard nut and lock- washer assemblies (1). 1. Position PCB (5) under instrument panel (2) against cowl (3). NOTE Perform step 2 for M1114 vehicles. Perform step 2.1 for M1113 vehicles. 2. From under hood, install PCB (5) on cowl (3) with four screws (5.1). Tighten screws (5.1) to 6 lb-ft (8 N•m). 2.1. From under hood, install PCB (5) on cowl (3) with four nut and lockwasher assemblies (1). Tighten nut and lockwashers assemblies (1) to 6 lb-ft (8 N•m). 3. Fill cannon plug (6) and PCB connector (7) to capacity with silicone compound. 4. Connect engine wiring harness cannon plug (6) to PCB connector (7). 5. From inside vehicle, connect body wiring harness cannon plug (4) to PCB (5). b. Installation a. Removal INITIAL SETUP: Tools General mechanic’s tool kit: automotive (Appendix B, Item 1) Maintenance and repair shop equipment: automotive (Appendix B, Item 2) Materials/Parts Silicone compound (Appendix C, Item 74) Four nut and lockwasher assemblies (Appendix G, Item 244) Personnel Required One mechanic One assistant Manual References TM 9-2320-387-10 TM 9-2320-387-24P Equipment Condition • Battery ground cables disconnected (para. 4-68). • Hood raised and secured (TM 9-2320-387-10). Maintenance Level Unit