T M 5 - 6 1 1 5 - 5 4 5 - 1 2T O - 3 5 C 2 - 3 - 4 4 4 - 1N A V F A C P - 8 - 6 2 6 - 1 2T M - 0 0 0 3 8 G - 1 2b. ?estirw,—(~ply 24 Vdc at pins A and B of main accontactor (3) connector. When main ac contactoroperates, it should create a distinctive noise.(2)With an ohmmeter, check for continuitybetween terminal Al to A2, B1 to B2, andCl toC2 on top of the main ac contactor.(3) At the connector, check for continuityb~tween pins C to D, E to F, G to H, J to K, andR to T.(4) At the connector, check for an open cir-cuit between pins L to M, N to P, and R to S.(5)Remove the 24 Vdcand check for the oppo-site of the conditions (continuity or opencircuit)listed in steps (2), (3), and (4).c. Replacement. See f i g u r e 3 - 2 4 and replacethe—main ac contactor (3) as follows:(1) Removal.(a) Remove fourscrews ( 1 ) which securecovers (2) on topof main ac contactor (3).(b) Tag and remove electrical connectionsto main ac contactor by removing six nuts andwashers ( 5 and 6).(c) Remove fourscrews (4) which securemain ac contactor to mounting bracket (7).(2) Installation. See f i g u r e 3 - 2 4 and installthe main ac contactor (3) in reverse order of removal.3 - 1 4 2 . R e p a i r o f L o a d T e r m i n a l B o a r d .a. Inspection. See f i g u r e 3 - 2 4 and inspect theloa~terminal board(8) for cracks, breaks, looseterminals and other damage. Inspect all electricalleads for brokenor frayed insulation andotherdarnage.~ Replacement of Load Terminal Board. See f i g u r e3 - 2 4 and replace the load terminal board (8) as follows:( 1 ) Removal.(a) Tag and remove electrical connections toloadterminal board(8).(b) Remove the two screws (9), four washers(10 and11), and two nuts(12)at the top andthe twoscrews ( 13)and nuts(14)at the bottom andremovethe load terminal board (8).(C) Disassemble load terminal board (8) asshownin detail A.(d) Inspect loadterminal board (8) for dam-aged threads on studs,and signs of physical damage.(e) Reassemble in the reverse order ofdisassembly.(2) Installation. See f i g u r e 3 - 2 4 and install loadterminal boardin reverse order of removal.c. Replacement of Lost or Broken Terminal Clip(R~ainer, Safety Clip).The terminal clip is a compo-nent of both the load terminal andthe ground terminal.If the terminal clip is lost or broken, fabricate asfollows:(1) Requisition bulk wire NSN9505-00-804-3814(0.042 inchdiameter) for the groundterminal (groundstud). Requisition bulk wire NSN9505-01-049-0144(0.050 inch diameter) for the load terminal.(2) Cut off about 3 inches of the wire; shortenoughto keep the clips from touching another terminalor the generatorframe in the open or closed position.(3) Slip the wire through the hole in the terminrd.(4) Hold the terminal as shown(Detail A, f i g u r e3 - 2 4 . 1 ) and bendboth ends of the wire straight up keep-ingthe wire in as straight a line as youcan with theterminal body.(5) Bend the wire into back-to-back 90° angles(Detail B, f i g u r e 3 - 2 4 . 1 ) so that the legs of both anglesare about one-half inch long.(6) Bend the ends of each 90° angle down andaround into a U-shape (Detail C, f i g u r e 3 - 2 4 . 1 ) so that ifdone properly, the clip will hold the nut when it is un-screwed to install the cable (Detail D, f i g u r e 3 - 2 4 . 1 ) .d. Repair. Repair damaged threads with a die or byfili~ w~ne mill triangular file,3 - 1 4 3 . C u r r e n t T r a n s f o r m e r A s s e m b l y .See f i g u r e 3 - 2 4 and inspect the current transformerassembly (18 ) for cracks, breaks, loose mounting, looseconnections, corrosion and other damage.3 - 1 4 4 . R e c o n n e c t i o n B o a r d .See f i g u r e 3 - 2 5 and proceed as follows:a. Inspection. Inspect reconnection board ( 1 5 ,f i g . 3 - 2 4 ) for cracks, breaks, loose mounting nuts, andother damage.& Testing. Test reconnection board for continuityas follows:(1) Remove 12 nuts ( 1 , f i g . 3 - 2 5 ) holding insula-tor (20) and remove insulator (2o).(2) Inspect bus bars (19) on rear of insulator (20)and replace bus bars if damaged or missing,(3) See f i g u r e 2 - 4 and check for continuity be-tween studs 1 and 4;2 and 5;3 and 6;7 and 10;8 and11; and 9 and 12. If no continuity, check respectivestuds for continuity on insulator ( 2 4 , f i g . 3 - 2 5 ) , Ifcontinuity is not obtained, generator is at fault. If checkindicates continuity, replace reconnection panel.c. Replacement. Replace reconnection board ( 1 5 ,f i g . 3 - 2 4 ) as follows:(1) Removal.(a) Remove four screws ( 16) which secure thereconnection board (15) to the brackets (17).(b) Tag and disconnect wires at back of recon-nection board.(c) Remove reconnection board (15 ).(2) Installation. Install reconnection board (15 )using removal steps in reverse order.Q. Repair. Repair reconnection board (see f i g . 3 - 2 5 )by replacement of damaged components.C h a n g e 1 33 - 7 1
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business