2-7. REPAIR METHODS (continued).
Gaskets, nonmetallic packings, preformed packings, seals, Iockwashers, self-locking nuts, self-locking screws, cotter
pins, and spring pins must be replaced. Bushings must be replaced if removed.
Springs must be replaced if broken, kinked, stretched, or cracked.
If a required part is not available, reconditioning of the old part is necessary. Such parts should be inspected carefully
after reconditioning to determine their suitability and probable service life. Replacement parts should be requisitioned
Ball and Roller Bearings
Refer to TM 9-214 for the cleaning, inspection, and Iubrication of bearings and for instructions for evaluating bearing
Removal of Burrs, Scratches, and Raised Metal
Remove burrs, scratches, or raised metal with a file or stone. Remove them from close-fitting surfaces by lapping the
surfaces with abrasive-grade compound.
Shafts, Gears, and Bearings
Gears, bearings, sleeves, and other components may be installed on shafts as tight fits. The use of an arbor press,
gear pullers, or other appropriate tools for removal and installation maybe required.
2-8. TORQUE VALUES.
Torque values given in these procedures apply to unlubricated threads. Follow torque values given throughout this
technical manual. When no torque value is given, refer to Appendix C, Torque Values for Threaded Fasteners, to
prevent damaging parts.
2-9. CLEANING INSTRUCTIONS.
All parts should be cleaned before inspection, after repair, and before assembly.
Drycleaning solvent P-D-880 is toxic and flammable. Always wear protective goggles
and gloves, and use only in a wlli-ventilated area. Avoid contact with skin, eyes, and
clothes, and DO NOT breathe vapors. DO NOT use near open flame or excessive heat.
Clean all metal parts except bearings with drycleaning solvent. Metal or fiber brushes maybe used to apply dry
cleaning solvent and to remove softened or dissolved material. Short lengths of wire maybe used to clear lubrication
holes of debris or deposit residue. Hand scraping with metal scrapers maybe used to remove softened coatings or
Soak very oily or greasy metal parts in a tank containing drycleaning solvent. Soaking time varies with the type and
amount of material to be removed.