S e c t i o n X V I . E N G I N E G E N E R A T O R S E T H O U S I N G G R O U P3 - 1 3 6 . G e n e r a l .3 - 1 3 7 . R e m o v a l a n d R e p l a c e m e n t .This section contains information on the housingSee f i g u r e 3 - 2 2 andremove and replace damagedgroup which encloses the engine generatorset. Thedoors, covers, panels, andassociated hardware ofhousinggroup is made up of covers and panelsthe housing group.Remove the load bank, if in-which are bolted together, and hinged doorswhichstalled, as described in p a r a g r a p h 4 - 4 9 .provide access to components:S e c t i o n X V I I . E N G I N E G E N E R A T O R A N D C H A S S I SI N T E R C O N N E C T I N G W I R I N G H A R N E S S E S3 - 1 3 8 . G e n e r a l .This section containsinformation on interconnect-ingwiring harnesses of the engine generator andchassis. The wiring harnesses provides electricalinterconnection between major assemblies of theengine generator set.3 - 1 3 9 . I n s p e c t i o n , T e s t , R e p a i r a n d R e p l a c e m e n t .See f i g u r e 3 - 2 3 and proceed as follows:CAUTIONAs a precaution against shortcircuits, disconnect the bat -terygroundcable from thebatteries before inspecting,testing, or replacing anywiring.~. Inspection.(1) Inspect connectors for damaged threads;bent, loose, or missing pins.(2) Inspect terminal lug for security and condi-tion.(3) Inspect wiring for defective insulation.b. Test. Perform continuity check, usingmulti-me~er between connecting points in the wiringharnessusing the wiring data contained in f i g s . 1 - 1 3t h r o u g h 1 - 1 6 .Check forshortcircuits between con-nector pinsof the same receptacle or terminalboard following data shown in f i g s . 1 - 1 3 t h r o u g h1 - 1 6 .c. Repair.—(1)If a brokenwire is accessible, removesufficient insulation from each side of the break toallow a good connection of the bared ends by twist-ing them together. Solderthe connection and wrapwithelectrical tape.(2)If a wire is brokenfrom a terminal lug,replace the lug.If a wire is broken from a connec-t or, resolder and reassemble.CAUTIONUnder no condition leave thebare connection exposed.(3) If a break in the wire is inaccessible with-in the wiring harness, disconnect it at oothends andtape both ends. Lace a new lead of the same gageandinsulation outside the harness and connect it tothe proper terminals or pins. Properly tag both endsof all replacement wires.~. Replacement.If 30% of the harness wires aredefective, the harnessmust be rebuilt by inter-mediate maintenance, but may be replaced by org-anizational maintenance.Tag all wires, connectors,and terminal boards for positive identification whena defective harness is removed. Disconnect harnessconnectors from receptaclesby unscrewing connec-torsin counterclockwisedirection. Remove allclamps which secure harness in position. Installnew or repaired harness in reverse sequence ofremoval.Section XVIII LOAD CONNECTION GROUP3 - 1 4 0 . G e n e r a l .3 - 1 4 1 . M a i n A C C o n t a c t o r .The lend connection group( f i g . 3 - 2 4 ) is used to pro-See f i g u r e 3 - 2 4 and proceed as follows:vide the electrical connection between the enginea. Inspection. Inspect mam ac contactor (3),generatorset and the external equipment to bewhi?h is located at the right of the reconnection boardoperated.(15), for secure mounting, loose electrical connec -tions, frayed cables or insulation, loose connectormating and other damage.3 - 6 0
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