Chapter 6. DIRECT SUPPORT MAINTENANCE REPAIR INSTRUCTIONS

TM 9-6920-361-13&P

CHAPTER 6

DIRECT SUPPORT MAINTENANCE REPAIR

INSTRUCTIONS

Section I. GENERAL MAINTENANCE

specific requirements.

6-1. General.

a. This section contains those procedures which

c. If a required new part is not available, a

are of a general nature. Reference will be made to

reconditioned used part may be substituted. Such

pertinent paragraphs in this section in the repair

reconditioned used parts should approximate the finish

sections, in order to eliminate constant repetition of

of corresponding new parts. Allowable tolerances must

general instructions. Special reclamation instructions are

not be exceeded. Remove all burs and rough spots with

contained in pertinent repair paragraphs.

a fine stone or crocus cloth.

b. In sections II through V, major assemblies are

d. Redrilling and filing of all replacement parts,

disassembled,

repaired,

overhauled,

replaced,

except bolts, is permitted to obtain proper fit.

assembled, and given a final inspection.

These

instructions are supplementary to instructions for

6-4. Use of Tools.

operator and organizational maintenance, which are

covered in preceding chapters.

a. Care must be exercised to use tools that fit and

are suitable for the task to be performed, in order to

6-2. Disassembly and Assembly Procedures.

avoid unnecessary mutilation of parts and/or damage to

tools.

a. In disassembling an assembly, remove the

major

subassemblies,

whenever

possible.

b. Keep tools clean and work with clean parts. The

Subassemblies may then be disassembled, as

rules of good housekeeping must be observed.

necessary, into individual parts.

6-5. Welding. Refer to TM 9-237.

b. During assembly, subassemblies should be

assembled first and then installed to form a complete

assembly. Lubricate parts that are normally lubricated

6-6. Repairing Damaged Threads. Repair damaged

with aircraft and instrument grease (GL) before

threads with a thread restorer or by chasing on a lathe.

assembly.

6-7. Painting. Refer to TM 43-0139.

c. Complete disassembly of an assembly is not

always necessary in order to make a required repair or

6-8. Cleaning. Refer to TM 9-208-1 and 9-208-2.

replacement. Good judgment should be exercised to

keep assembly and disassembly operations to a

6-9. Finished Surfaces. All painted or treated surfaces

minimum.

will be refinished to match the appearance of new parts

as outlined below.

d. Maintenance functions to be performed are

outlined in appendix B.

Disassembly will follow

a. Paint all surfaces on

which

paint

has

numerical sequence in the illustrations, assembly will

deteriorated or become damaged.

follow reverse order of numerical sequence in the

illustrations.

b. Do not paint working parts inside groups or

mechanisms. Lightly lubricate such components in

6-3. Replacement of Parts.

accordance with paragraph 3-4.

a. Replace all damaged screws, nuts, pins, or snap

c. Do not paint polished machine-finished surfaces.

rings.

6-10. Lubrication. Refer to paragraph 3-4.

b. Replace all springs, if they are broken, kinked,

bent, if they fail to function properly, or if they fail to meet

6-1