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FLYWHEEL DIAGNOSIS AND TESTING Check flywheel runout whenever misalignment is suspected. Flywheel runout should not exceed 0.08 mm (0.003 Common causes of runout are: • heat warpage • improper machining • incorrect bolt tightening • improper seating on crankshaft flange shoulder • foreign material on crankshaft flange Flywheel machining is not recommended. The flywheel clutch surface is machined to a unique contour and machin- Clean the crankshaft flange before mounting the flywheel. Dirt and grease on the flange surface may cock the fly- T Lock And Seal. Tighten flywheel bolts to specified torque only. Overtightening can distort the flywheel hub causing runout. PILOT BEARING REMOVAL 1. Remove transmission, transfer case, if equipped, and clutch housing. Refer to 21 Transmission and Transfer Case for procedures. 2. Remove clutch cover and disc. 3. Using a suitable blind hole puller, remove pilot bearing. INSTALLATION 1. Clean bearing bore with solvent and wipe dry with shop towel. 2. Install new bearing (1) with clutch alignment tool (2). Keep bearing straight during installation. Do NOTE: Letter side of bearing (3) must face trans- 3. Install clutch cover and disc. 4. Install clutch housing, transmission and transfer case, if equipped. 6 - 10 CLUTCH ND |