4.51 MASTER SWITCH S1 MAINTENANCE

4.50 GLOWPLUG/START SWITCH S2 MAINTENANCE.

Figure 4-48 Control Cabinet Assembly, Preheating Resistor R1, BATTLE SHORT Switch S21, VOLTAGE SELECTOR SWITCH S11 GLOWPLUG/START Switch S2, MASTER SWITCH S1 Maintenance

TM-9-6115-668-13 5Kw 28VDC Auxiliary Power Unit (APU) MEP 952B Manual
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TM 9-6115-668-13 4.51 MASTER SWITCH S1 MAINTENANCE. This task covers: a. Removal b. Installation Tools Equipment Conditions General Mechanic’s Tool Kit Reference (item 2, appendix B) Generator Set 150 kW shut Automotive Fuel and Electrical System Repair, Tool Kit down, (item 3, appendix B) paragraph 2.5.2 Materials/Parts Cable ties (item 10, appendix E) Disconnect the negative battery cable first and then the positive bat- tery terminal cables. Failure to observe this warning could result in se- vere personal injury or death. Tag ail cables prior to removal to ensure correct connection of the cables during installation. 1. Open flap (2, figure 4-48) on unit hood assembly (1). 2. Open front panel (4) on control cabinet assembly (3) and secure with prop (5). 3. Remove key (41) from MASTER SWITCH S1 (43). 4. Record labeling and position of cables (44) to terminals (40) of MASTER SWITCH S1 (43). 5. Loosen screws (45) and remove cables (44) from MASTER SWITCH S1 (43). 6. Remove nut (42) from MASTER SWITCH S1 (43) and pull MASTER SWITCH S1 (43) from front panel (4). 1. Install MASTER SWITCH S1 (43) through rear of front panel (4) and install nut (42) on MASTER SWITCH S1 (43). 2. Install cables (44) on terminals of MASTER SWITCH S1 (43), noting correct labeling and position, and tighten screws (45). 3. Insert key (41) into MASTER SWITCH S1 (43). 4. Stow prop (5) and close front panel (4). 5. Close flap (2). 4 - 1 2 6

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