5.22 MINIATURE RELAY MAINTENANCE.

Figure 5-37 Control Cabinet Assembly, Engine Preheating Control Board, Auxiliary Contactor K109, Diodes, Time Relay Maintenance.

INSTALLATION - TM-9-6115-668-13_512

TM-9-6115-668-13 5Kw 28VDC Auxiliary Power Unit (APU) MEP 952B Manual
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TM 9-6115-668-13 5.22 MINIATURE RELAY MAINTENANCE. This task covers: a. Removal b. Installation INITIAL SETUP Tools Equipment Conditions General Mechanic’s Tool Kit (item 2, appendix B) Automotive Fuel and Electrical System Repair, Tool Kit (item 3, appendix B) Materials/Parts Reference Generator Set 150 kW shut down, paragraph 2.5.2 Cable ties (item 10, appendix E) WARNING 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. CAUTION Tag all cables prior to removal to ensure correct connection of the cables during installation. REMOVAL 1. Open flap (2, figure 5-38) on unit hood assembly (1). 2. Open front panel (4) of control cabinet assembly (3) and secure with prop (5). N O T E Removal procedure for miniature relay K103 (6), K104 (7), K111 (9) is the same as for miniature relay K105 (8), described below. 3. Remove miniature relay K105 (8): a. Pull miniature relay K105 (8) out of relay socket (12). 4. Remove relay socket (12) from miniature relay K105 (8): a. Remove screws (15), serrated lock washers (14), and washers (13) from clips (10) on mounting bar (11). b. Pull the four relay sockets (12) forward. c. Hold onto the relay sockets and pull each relay socket forward. 5. Note correct labeling and position and remove cables (17) with flat connectors (16) from relay sock- ets (12). a. Slide a screwdriver between relay socket (12) and flat connector (16) from above, and push down snap-in hooks (18). b. Pull cable (17) with flat connector (16) downward out of relay socket (12). 5-153

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