ARMY TM 9-2815-260-24 AIR FORCE TO 38G1-126-2 MARINE CORPS TM 09244A/09245A-24 4-91 (e) Rotate engine 360 ° (1 complete revolution) using flywheel rotation tool while observing dial indicator.  If wobble exceeds 0.020 in. (0.5 mm) replace torsional damper, refer to step b. b.    Removal. (1) Remove fan drive belt and fan, refer to TM 9-6115-672-14. CAUTION Torsional damper is sensitive to impact damage.  Do not drop or hammer on damper. (2) Remove bolts (3, Figure 4-60). FIGURE 4-60.  CRANKSHAFT PULLEY (3) Grasp torsional damper (2, Figure 4-60) and remove from crankshaft. c.     Replacement. (1) Inspect torsional damper, refer to 4.8.1.a.  Replace if damaged. (2) Remove torsional damper, refer to 4.8.1.b. (3) For installation, refer to 4.8.1.d.