TM-9-2815-205-24 Technical Manual for M113 Engine 6V53 6V53T Download
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REPAIR OR REPLACEMENT CAUTION Do not modify inside surface finish of new liner. Liner is properly finished at factory so changes will adversely affect piston ring seating. NOTE Hone used cylinder liners to break glaze resulting from extended operation and remove ridge formed at top of piston ring travel. If glaze is not removed, time required to seat new piston rings will be lengthened. A scrap cylinder block makes an excellent honing fixture. 1. Place liner (Figure 6, Item 1) in honing fixture (Figure 6, Item 8). CAUTION If liner is honed in block, completely dismantle engine to ensure all abrasive material is cleaned out, refer to (WP 0099). 2. Work cylinder hone (Figure 6, Item 7), equipped with 120 grit stones, up and down full length of liner a few times between 300–400 rpm to produce a crisscross pattern of hone marks on 45 degree axis. WARNING Cleaning solvent is TOXIC and flammable. Wear protective goggles and gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and clothes; and do not breathe vapors. Keep away from heat or flame. Never smoke when using cleaning solvent. Failure to comply may result in injury, illness, or death to personnel. Compressed air used for cleaning purposes will not exceed 30 PSI (207 kPa). Use only with protective equipment (goggles, face shield, gloves, etc.). Failure to comply may result in injury to personnel. NOTE After honing, liner must conform to same limits on taper and out-of-round as a new liner and piston to liner clearance must be within specified limits. 3. Remove liner from fixture and clean with cleaning solvent. Dry with compressed air and check surface for burrs and finish. Surface finish must be maintained between 32–55 RMS. TM 9-2815-205-24 0096 0096-8