TM 9-6115-604-34NAVFAC P-8-633-34(38)Make simple electrical repairs to the field coils, such as resoldering leads, wrapping frayed windings withinsulating s tape, and painting with insulating varnish MS355632. Solder in accordance with MIL-S6872,using solder QQ-S571, Type SN 60, and rosin flux.(39)Replace the field coils for electrical shorts, opens, or grounds, and for oil soaking, or insulation obviouslydamaged beyond repair. Replace the field coils as follows:(a) Place a pole shoe spreader between opposite pole rotor shoes (58) and tighten it in place.(b) Using a pole shoe screwdriver and an arbor press, remove the pole shoe screws (57), then removethe pole shoe spreader and the pole shoes.(c) Repeat steps (a) and (b), above, for the other two pole shoes.(d) Remove the plain hexagonal nut (37), terminal lug (53), hexagonal nut (38), flat washer (40), andfield terminal washer (54).(e) Push in the field coil terminal stud, and slip the field coils (61) out of the field frame (64).(f)Remove the field cod insulators (56), insulator plate (60), field terminal washer (54), and terminalbushings (55). Discard the insulators, bushings, or washers if defective.(g) Insert the new field coil (61) into the field frame (64) using new field coil insulators (56), insulatorplates (60), terminal bushings (55), and field terminal washer (54).NOTEIf the pole rotor shoes (58) have a long lip on one side, the lip must face in the direction ofarmature rotation when viewed from the drive end). This locates the lip as the trailing edge ofthe pole rotor shoe.(h) Insert the pole rotor shoes (58) into position in the field coils, and retain with the pole shoe screws(57). Do not tighten the screws at this time.(i) Check to be sure that the insulators (56 and 60) are properly placed, and the pole rotor shoes are notpinching the field coils (61). Tighten the pole shoe screws (57) using an ordinary screwdriver.(j)Place a pole shoe spreader between opposite pole rotor shoes (58), and tighten it in place.(k) Using a pole shoe screwdriver and an arbor press, tighten the pole shoe screws (57) in accordancewith Table 1-2, and remove the pole shoe spreader.(I) Repeat steps 0) and (10, above, for the other two pole shoes.(m) Be sure the terminal bushings (55) and field terminal washer (54) are property positioned on the stud,and install another field terminal washer (54), flat washer (40), and hexagonal nut (38) on theterminal stud.(n) To make sure that the field coils (61) have been installed properly and were not damaged duringinstallation, check for grounds and opens in accordance with steps (15) and (16), above.(o) Install the terminal lug (53) and hexagonal nut (37) on the terminal stud. Do not tighten the nut atthis time.(40)Replace a defective electrical holder assembly (51) and insulators as follows:(a)Remove the hexagonal nut (38), lockwasher (39), flat washer (40), terminal stud bushing (41), andinsulator washer (42).(b) Remove the bush plate screws (49), and remove the electrical holder assembly (51), brush plateinsulator (46), and insulator washer (42). Discard the insulators if defective.(c) Install the brush plate insulator (46) and insulator washer (42) on the electrical holder assembly (51),and insert the stud through the hole in the starter housing (43).(d) Install the insulator washer (42), terminal stud bushing (41), flat washer (40), lockwasher (39), andhexagonal nut (38). Do not fully tighten the nut at this time.(e) Install the brush plates screws (49), and tighten them in accordance with Table 1-2.(f) Tighten the hexagonal nut (38, Figure 4-3) to 20 to 25 pound-feet (27 to 34 newton-meters).4-14
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