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TM-5-4210-229-14P Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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INSPECTION - TM-5-4210-229-14P_430
TM5-4210-229-14&P 6-13.  FLYWHEEL, CRANKSHAFT, AND MAIN BEARING MAINTENANCE (Continued). This task cover:     a.  Removal b.  Inspection c.  Installation INITIAL SET-UP Tools Rockwell Hardness Tester Pilot Driver General Mechanics Tool Kit Hoist/ Sling Micrometer Wire Brush Equipment Condition Para. Condition Description 4-92 Oil Pan Removed 6-6 Cylinder Head and Valves Removed 6-10 Timing and Gear Train Removed 6-11 Oil Pump Removed Materials/Parts Flywheel (683961C91) Ring Gear (61544H) Crankshaft Bearings (684570C92) Crankshaft (681319C92) Cleaning Solvent (Appendix D, item 54) Lubricating Oil (Appendix D, Item 37) Bluing Ink (Appendix D, Item 23) Lint-Free Cloth (Appendix D, Item 14) Plastigage (Appendix D, Item 40a) a.  Remove flywheel bolts.  Pull off flywheel with ring gear.  Support the flywheel so as not to damage the crankshaft dowel pin. b.  Crankshaft bearings removal. (1) Remove the capscrews securing the crank- shaft bearing caps. (2) Tap the caps lightly with a soft metal ham- mer or mallet to loosen them, then remove lower bearings. (a) If the bearings are to be reused, iden- tify each bearing as to its original position. (b) Remove the lower bearing from the caps. (c) Wrap the pieces in a clean cloth and store them until reassembly. NOTE If the crankshaft is to be removed, disregard step 3. (3) Remove the upper bearing halves as described in methods (a) or (b). (a) Insert a thin piece of flexible soft metal between the crankshaft and crankcase. This will push against the end of the bearing furthest from the nib holding the bearing in the crankcase support. Simultaneously, turn the crankshaft in the direction of rotation.  This will cause the bearing to slide easily from position. (b) An alternate method of removing up- per bearing halves is to hammer the closed end of a small cotter pin to form a T. (c) Insert the prongs of the cotter pin into the oil hole of the crankshaft journal with the flattened head just protruding. Rotate the crankshaft and the cotter pin head will push the bearing from position. c.  Crankshaft removal. When lifting an object, make sure the hoist and sling are fastened securely.  Be sure the item being lifted does not exceed the capacity of the lifting device. 6-36

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