GENERAL REASSEMBLY.

resistance of the wire and impair efficiency of the

e. Prior to resurfacing, scrape off loose and

e l e c t r i c a l c o m p o n e n t s , e s p e c i a l l y the ignition

blistered paint from damaged areas. Clean area to

system.

be painted by sanding or buffing. Remove residue

cleaning material with paint thinner, Federal

i . Replace all broken, frayed, crimped, or soft

Specification TT-T-306, and dry thoroughly.

flexible lines and hoses. Replace fittings which are

stripped or damaged. Replace entire flexible hose if

f. During repair operations, bare steel surfaces

fittings are damaged. Make sure the hose clamps do

shall be protected from oxidation when not

not crimp hoses.

actually u n d e r g o i n g r e p a i r w o r k , i . e . , w h i l e

reinspection or

awaiting any

repair

step,

j. Replace any bolt, screw, nut, or fitting on

reassembly. Such protection shall be accomplished

which threads are damaged. Inspect tapped holes

b y dipping the parts in, or spraying them with

Military

for thread damage. If cross-threading or spalling is

preventive

compound,

corrosion

evident, retap the hole for the next oversize screw

S p e c i f i c a t i o n MIL-C-6259. The same protective

or stud. When retapping will result in weakening

coating shall be applied to other metals, if

the part, or when the cost of the part makes

necessary to prevent oxidation under climatic or

retapping impractical, replace the damaged part. At

atmospheric conditions prevailing. Aluminum parts

times, merely chasing the threads with the proper

may require protection in atmospheres having a

size tap or die will be adequate.

high salt content. Steel parts must be protected in

all instances.

5-7. GENERAL REASSEMBLY.

Note

a. Remove protective grease coatings from new

parts prior to installation.

The above instruction is applicable to

polished and machined steel parts not

b. To replace a preformed packing, first dovetail

protected by cadmium, tin, copper, or

groove, then stretch packing and place into

o t h e r plating or surface treatment. Bare

position. Rotate component on flat surface,

m e t a l surfaces must be free of moisture

applying a downward pressure to uniformly press

when applied. Acid present in perspiration

the packing into position.

and skin oils may attack steel surfaces if

fingerprints are not removed. Dip parts in

c. To provide added sealing for gaskets, coat both

f i n g e r p r i n t remover compound, Military

s i d e s with Permatex Super 300 gasket sealant

Specification MIL-C-15074, after handling,

to prevent such action.

( P e r m a t e x Co., I n c . , West Palm Beach, Fla.) or

e q u i v a l e n t . Be sure that all traces of previous

gasket and sealant are removed before installing

g. Welding and brazing processes may be

employed for the repair of cracks in external steel

new gasket.

parts, s u c h a s b r a c k e t s , p a n e l s , a n d l i g h t

framework. However, the time required, the

d. Install oil seals with seal lip facing in, applying

difficulty of working with the metal, and the

an even force to the outer edge of seal. Coat oil

seals evenly with oil or grease before installing. If

c h a n c e of embrittlement and subsequent failure

oil seals are to be installed over keyed or splined

make such repairs of questionable value. Hence

they should be attempted only when replacement

shafts, use a guide to prevent sharp edges of the

parts are not available. Welding and brazing of

keyway of splines from cutting the leather or

castings and running parts or parts to which great

neoprene seal. Guides can be constructed of very

thin gage sheet metal and shaped to the required

stress is applied is not permissible, except in

emergencies. Refer to paragraph 5-8 for specific

diameter. However, make certain the guide edges

welding instructions.

are not sharp and are bent slightly inward so they

do not cut the seal.

h. Replace all broken, worn, or burned electrical

wiring. Wires on which several strands are broken

e. During reassembly of shafts and bearings in

must be replaced. Broken strands will increase the

housings, first mount bearing on shaft, then install

5-4