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Figure  5-7.  Switch  Box  Components.
Figure 5-8. Switch Box Lead Connections.

TM-9-6115-660-13P Power Plant Diesel Engine Driven 1-Ton Trailer Mounted (With Racks) 3Kw 60 Hz AN/MJQ-42 Manual
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TM  9-6115-660-13&P 5-7 ELECTRICAL LEADS W3 - W8 MAINTENANCE. This  task  covers:  a.  Test c.  Repair b.  Removal d. Installation INITIAL  SETUP Tools Equipment  Conditions Tool  Kit,  General  Mechanic’s (item 1, appendix B) Reference Multimeter  (item  3,  appendix  B) Both  generator  sets  shut  down;  paragraph Crimping  Tool,  Hydraulic (item 4, appendix B) 2-5.3.3.  Trailer  handbrakes  set,  front  support leg/landing  leg  lowered,  and  rear  leveling- -support  jack  lowered;  paragraph  2-3.2.1. Materials/Parts Switch box cover open. Lock  washers TEST 1. Check continuity of lead W3 between contactor terminal K1-A1 and switch box load terminal L1. 2. Check continuity of lead W4 between contactor terminal K1-B1 and switch box load terminal L2. 3. Check continuity of lead W5 between contactor terminal K1-C1 and switch box load terminal L3. 4. Check continuity of lead W6 between contactor terminals K1-A1 and K2-A1. 5. Check continuity of lead W7 between contactor terminals K1-B1 and K2-B1. 6. Check continuity of lead W8 between contactor terminals K1-C1 and K2-C1. 7. Repair or replace any lead that does not have continuity (figure G-1, appendix G). REMOVAL NOTE Figure 5-8, Detail A, shows connections at K1 or K2. Detail B shows connections at switch box load terminals. 1. Locate W3-W8 connections to terminals A1, B1, and C1 of contractors (13, figure 5-8 Detail A) and remove four screws (5), lock washers (6), and contactor shield (7). 5-13







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