TM 5-3805-290-23-2
MECHANICAL GENERAL MAINTENANCE INSTRUCTIONS - CONTINUED
0023 00
REPAIR INSTRUCTIONS
00023 00
1.
General.
a.
Any repair procedure peculiar to a specific part or component is covered in the work package relating to that item.
CAU T I ON
Repaired items must be thoroughly cleaned to remove metal chips and abrasives, to prevent them from
entering working parts of the machine.
b.
After repair, clean all parts thoroughly to prevent dirt, metal chips, or other foreign material from entering any
working parts.
2.
Castings.
a.
Only minor repairs to machined surfaces, flanges, and gasket mating surfaces are permitted. Remove minor nicks,
burrs and scratches with:
(1)
Fine-mill file.
(2)
Crocus cloth dipped in solvent cleaning compound.
(3)
Lapping across a surface plate.
b.
Remachining of machined surfaces to repair damage, warpage, or uneven surfaces is not permitted. Replace cast-
ings.
c.
Repair damaged threaded pipe plug or screw threads with a tap or die. Repair oversized holes with threaded
inserts.
3.
Studs.
a.
Repair minor thread damage with a thread die.
b.
Replace studs having stripped or damaged threads as described below:
(1)
Remove using a stud remover. Back studs out slowly to avoid heat buildup and seizure that can cause stud
to break off.
CAU T I ON
Refer to TC 9-237, Operator's Circular for Welding Theory and Application, to avoid damage to castings if
welding method is used.
(2)
If studs break off too short to use a stud remover, use a stud extractor to remove or use "welding method":
weld bar stock or a nut to stud and remove with a wrench.
(3)
Install replacement stud slowly to prevent heat buildup and break-off.
4.
Gears.
a.
Remove gears using pullers.
b.
Only minor repairs to gears are permitted. Remove minor nicks, burrs, or scratches on gear teeth with:
(1)
Fine-mill file.
(2)
Crocus cloth dipped in solvent cleaning compound.
5.
Bushings and Bushing Type Bearings.
a.
When bushings and bushing type bearings seize to a shaft and spin in the bore, associated parts must also be
replaced.
b.
It may be necessary to heat bearings to aid in installation.
0023 00-6
