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Page Title: CLEANING AND INSPECTION
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TM 5-2420-222-34 3-9. ENGINE FLYWHEEL AND RING GEAR MAINTENANCE (Con’t). b. CLEANING AND INSPECTION WARNING Dry  cleaning  solvent,  P-D-680,  is  toxic  and  flammable.    Always  wear  protective goggles  and  gloves,  and  use  only  in  a  well-ventilated  area.    Avoid  contact  with skin, eyes, and clothes, and DO NOT breathe vapors.  DO NOT use near open flame or  excessive  heat.  The  solvent's  flash  point  Is  100°F-138°F  (38°C-59°C).    If  you become dizzy while using cleaning solvent, immediately get fresh air and medical help.  If solvent contacts eyes, Immediately wash your eyes and get medical aid. 1. Clean flywheel and assembled ring gear and four capscrews with dry cleaning solvent and rags.  Dry parts thoroughly with clean, dry rags. 2. Inspect flywheel and assembled ring gear for cracks, breaks, damaged teeth, scoring, and discoloration.  If damaged, replace flywheel and assembled ring gear. 3. Using square edge and thickness gage, measure flatness of clutch contact surface at several locations on flywheel. Clutch contact surface must be flat within 0.006 in.  (0.152 mm). 4. Inspect ball bearing (5) (see TM 9-214). c. DISASSEMBLY CAUTION Do not perform disassembly unless ball bearing Is damaged.  Damage to parts may result. Using mechanical gear and bearing puller, remove ball bearing (5) from flywheel (4) and assembled ring gear (3). d.    ASSEMBLY If removed, install ball bearing (5) on flywheel (4) and assembled ring gear (3) with hammer and drift. e. INSTALLATION WARNING Use extreme caution when handling heavy parts.  Lifting device Is required when parts weigh over 50 lb (23 kg) for a single person lift, over 100 lb (45 kg) for a two person lift, and over 150 lb (68 kg) for a three or more person lift.  Keep clear of heavy parts supported only by lifting device.  Failure to follow this warning may cause serious Injury or death to personnel. 1. With the aid of an assistant and lifting device, lift flywheel (4) and assembled ring gear (3) into position on crankshaft (1) and pin (2). 2. Install four capscrews (6) in flywheel (4) and crankshaft (1).  Torque capscrews to 120 Ib.-ft.  (163 N•m). 3. Remove lifting device from flywheel (4) and assembled ring gear (3). FOLLOW-ON TASKS: Install clutch pressure plate, disk, carrier, and bearing (see paragraph 4-1 or 4-2). 3-61

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