2-16Change 4Section III GENERAL MAINTENANCEREPAIR METHODSABCDEFGComplete disassembly is not always necessary to make a repair.Exercise good judgement to keep disassembly and assembly to aminimum.Repair or replace unserviceable parts and hardware. Always replacepackings, gaskets, seals, lockwashers, locknuts, locking wire, rivets andcotter pins with new parts.Remove burrs with a stone or file. Remove burrs on closely fitted matingsurfaces by lapping the surfaces with abrasive-grade compound.Remove corrosion or rust with sandblasting, vapor-blast cleaning, orcrocus cloth. Use the method that will not damage the surface beingcleaned. Crocus cloth should be used to remove corrosion and rustfrom polished surfaces. Make sure that critical dimensions are notchanged when using crocus cloth.Repair damaged threads with a thread restorer file by chasing in a latheor using a tap or die. Replace defective threaded inserts. See page 2-17 for procedure.When welding is authorized, procedure in TM 9-237 must be followed.Welds must be inspected for cracks.Bearings should be inspected and maintained per TM 9-214.TORQUE VALUESTorque values given in these procedures apply to unlubricated threads.Follow torque values given throughout this manual. When no torque valueis given, follow the Torque Value Guide (Appendix C) to prevent damagingparts.TM 9-2350-267-34Dry-cleaning solvent (PD-680) is toxic andflammable. To prevent personal injury when usingPD-680, use only in a well ventilated area. Avoidbreathing vapors. If you become dizzy get fresh airimmediately and seek medical attention. Avoidcontact with eyes, skin, and clothing. Use protectivegoggles, gloves, and clothing. If contact is made,immediately flush with water and seek medicalattention. The flashpoint for Type I dry-cleaningsolvent is 100°F (38°C); for Type II it is 138°F(50°C). Do not use near open flame or excessiveheat.
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