5.20 TIME RELAY MAINTENANCE.

TM-9-6115-668-13 5Kw 28VDC Auxiliary Power Unit (APU) MEP 952B Manual
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TM 9-6115-668-13 5.20 TIME RELAY MAINTENANCE. This task covers: a. Removal b. Test c. Installation d. Adjust 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) Watch, stop (item 5, 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. C A U T I O N Tag all cables prior to removal to ensure correct connection of the cables during installation. REMOVAL 1. Open flap (2, figure 5-37) 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 all time relays is the same as for time relay K106, described below. 3. Record labeling and position of cables (23, 25) to upper terminals (22, 26) of time relay K106 (27), loosen screws (21, 24) and remove cables (23, 25). 4. Record labeling and position of cables (31, 34) to lower terminals (32, 35) of time relay K106 (27), loosen screws (33, 36) and remove cables (31, 34). 5. Use a screwdriver to push locking element (30) on time relay K106 (27) in direction of arrow, tilt time relay K106 (27) upward, and remove from mounting bar (41). 5 - 1 4 5

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