2-16
Change 4
Section III GENERAL MAINTENANCE
REPAIR METHODS
A
B
C
D
E
F
G
Complete disassembly is not always necessary to make a repair.
Exercise good judgement to keep disassembly and assembly to a
minimum.
Repair or replace unserviceable parts and hardware. Always replace
packings, gaskets, seals, lockwashers, locknuts, locking wire, rivets and
cotter pins with new parts.
Remove burrs with a stone or file. Remove burrs on closely fitted mating
surfaces by lapping the surfaces with abrasive-grade compound.
Remove corrosion or rust with sandblasting, vapor-blast cleaning, or
crocus cloth. Use the method that will not damage the surface being
cleaned. Crocus cloth should be used to remove corrosion and rust
from polished surfaces. Make sure that critical dimensions are not
changed when using crocus cloth.
Repair damaged threads with a thread restorer file by chasing in a lathe
or 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 VALUES
Torque values given in these procedures apply to unlubricated threads.
Follow torque values given throughout this manual. When no torque value
is given, follow the Torque Value Guide (Appendix C) to prevent damaging
parts.
TM 9-2350-267-34
Dry-cleaning solvent (PD-680) is toxic and
flammable. To prevent personal injury when using
PD-680, use only in a well ventilated area. Avoid
breathing vapors. If you become dizzy get fresh air
immediately and seek medical attention. Avoid
contact with eyes, skin, and clothing. Use protective
goggles, gloves, and clothing. If contact is made,
immediately flush with water and seek medical
attention. The flashpoint for Type I dry-cleaning
solvent is 100°F (38°C); for Type II it is 138°F
(50°C). Do not use near open flame or excessive
heat.
