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ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 4-90 (8) Install rear crankshaft oil seal/wear sleeve assembly, refer to paragraph 4.8.2. (9) Install flywheel, refer to paragraph 4.8.1. 4.9. CRANKSHAFT PULLEY, TORSIONAL DAMPER, AND TIMING GEAR COVER ASSEMBLY MAINTENANCE 4.9.1.   TORSIONAL DAMPER. NOTE The following procedures require complete access to the engine.  If necessary, remove engine from generator set, refer to TM 9-6115-672-14.   Mount engine on repair stand (NSN 4910-01-016-1835 or equal) as outlined in paragraph 4.10. a.     Inspection. (1) Visually inspect torsional damper for damaged, separated, or partially missing rubber.  If rubber is damaged, separated, or partially missing replace torsional damper, refer to 4.9.1.b. (2) Grasp outer ring of torsional damper and attempt to turn torsional damper in both directions.  If rotation is felt replace torsional damper, refer to step 4.9.1.b. (3) Check torsional damper radial runout as follows: (a) Run engine until engine is at operating temperature, refer to TM 9-6115-672-14. (b) Attach magnetic base of dial indicator to magnetic surface near torsional damper. (c) Position dial indicator against outer diameter of torsional damper and zero dial indicator. (d) Rotate engine 360 ° (1 complete revolution) using flywheel rotation tool while observing dial indicator.  If runout exceeds 0.060 in. (1.50 mm) replace torsional damper, refer to step b. (4) Check torsional damper wobble as follows: (a) Attach magnetic base of dial indicator to magnetic surface near torsional damper. (b) Position dial indicator against side of outer ring of torsional damper and zero dial indicator. (c) Rotate engine 360 ° (1 complete revolution) using flywheel rotation tool while observing dial indicator.  If wobble exceeds 0.060 in. (1.50 mm) replace torsional damper, refer to step b. (d) Position dial indicator against side of inner ring of torsional damper and zero dial indicator.


 


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