Repair/Overhaul. - TM-5-6115-593-34

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 (28 and 35) or sleeve bearing (53). Ensure that bushing is started square and driven straight into housings (21, 3 and 6) until level with, or slightly below, thrust surface. Bushings are sized to be a correct fit on armature shaft when installed. Do not ream, drill, or machine bushing. (f) Check fit of bushings or bearing on armature (36). Correct clearance is 0.0015 to 0.003 inch (0.038 to 0.08 mm). If bushing fits too tightly, it was incorrectly installed; remove damaged bushing and install a new one. If fit is too loose, check armature shaft for wear. (3) Replace armature (36) for any of the following defects: (a) Thrown solder due to overheating. (b) Loose windings. (c) Loose commutator bars. (d) Bushing surface worn to the extent that clearance between bushing exceeds 0.0015 to 0.003 inch (0.038 to 0.08 mm). (e) Bushing surface scored to depth of more than 0.003 inch (0.08 mm). (f) Damaged or uneven wear of splines. (g) Shaft runout exceeds 0.005 inch (0.13 mm) TIR. (h) Presence of electrical opens, shorts, or grounds. (4) If commutator runout is over 0.005 inch (0.13 mm) or it is scored, uneven, or burned, repair as follows: WARNING LATHE OR MILLING OPERATIONS CREATE METAL PARTICLES WHICH MAY ENTER THE EYES. WEARING GOGGLES IS REQUIRED TO AVOID INJURY TO PERSONNEL. (a) Resurface commutator using armature and undercutting lathe MIL-L-14576. (b) After machining, undercut insulation between commutator bars to a depth and width of 0.031 inch (0.79 mm). CAUTION Do not use emery cloth or paper for the following operation. Emery dust could cause electrical shorts in the starter motor. (c) After machining and undercutting, remove any burrs from commutator using sandpaper P-P105; do not use emery cloth. After deburring, remove any sanding or copper dust from slots between commutator bars. WARNING AVOID BREATHING FUMES GENERATED BY SOLDERING. REMOVE RINGS AND WATCHES. EYE PROTECTION IS REQUIRED TO AVOID INJURY TO PERSONNEL. (5) Resolder any field coil leads as required, in accordance with MIL-S-6872, using solder QQ- S-571, Type SN 60, and rosin flux.(F) Refer to TO-00-25-234. (6) If frayed field coil windings are present, wrap with insulating tape and paint with insulating varnish MS355632. 13-18

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