LUBRICATION - TM-10-3930-623-340075

TM 10-3930-623-34

6-3. GENERAL INSTRUCTIONS.

6-8. PAINTING.

6-9.

Overhaul procedures include painting as a

6-4. LUBRICATION. Before installing or assembling

necessary step in the completion of the procedure.

internal metal parts, coat each part with a thin film of OE-

Before the paint is applied, prepare the surface to be

10 engine oil, except where such application would

painted in accordance with paragraph 6-12. Synthetic

impair operation of the assembled unit. Such lubrication

paint primer, Federal Specification TT-P-636, and Class

provides easier installation, reduces the possibility of

B, yellow color paint, number 1310, Federal

damage during installation, and assures immediate

Specification TT-C-595, are used on the sheetmetal and

lubrication of the assembly when the equipment is first

uprights.

started.

6-10. CLEANING MATERIALS. Use the appropriate

CAUTION

cleaning materials listed in figure 5-1 prior to applying

paint.

Never apply engine oil to rubber

SOLVENT HANDLING.

Solvents used for

6-11.

parts, electrical contacts, or internal

removing paint are generally toxic and volatile. Avoid

parts of the hydraulic brake system.

inhaling the vapor and take precautions to keep such

compounds from coming in contact with unprotected

6-5. GASKET REPLACEMENT. Use new gaskets

areas of the face or body. Confine the use of such

throughout when reassembling. Soak cork gaskets in

compounds to a well-ventilated room, or apply out-of-

OE-10 engine oil fifteen minutes before installing. Apply

doors to prevent headaches or nausea.

approved gasket cement to one side of paper gaskets,

when required.

NOTE

Never use paint removing solvents

INSTALLATION OF BEARINGS.

Exercise

6-6.

from damaged or leaking containers

extreme care when installing or removing ball, roller or

or solvents that have been exposed

needle bearings. Failure to comply with installation and

to the air for long periods of time. Do

removal procedures listed below could result in

not permit paint removing solvent to

damaged bearings and consequent malfunctioning of an

come in contact with bearings,

assembled unit.

rubber, insulated wires, or plastic

materials as the solvent will quickly

1. Make sure bearings, bearing seats, and tools

deteriorate such materials.

are thoroughly cleaned before attempting to install

bearings.

6-12. SURFACE PREPARATION. Painting previously

2. Apply a thin film of lubricating oil OE-10, engine

painted surfaces necessitates the partial or complete

oil, to contact surfaces of bearing and bearing seats

removal of the old paint before a satisfactory covering

before installation.

can be achieved.

3. Carefully align bearing with bearing seat before

1. Use paint removing solvents, abrasives,

installing to avoid cocked or distorted bearings.

scrapers or wire brushes, as necessary, to remove old

4. Carefully press bearings into seats with an arbor

paint, dirt, and rust from the area to be painted. Wash

press or appropriate removing and replacing tool.

the cleaned area with a paint thinner to remove wax

Always apply pressure to the race which determines the

deposits or abrasive particles.

fit when installing bearings.

2. If paint removal is not necessary, a thorough

5. If bearing must be tapped into its seat, use a

washing and degreasing job must be accomplished

rawhide hammer or cushion the bearing with a block of

before paint can be applied. Wash surfaces with soap

wood to prevent damage.

and water, rinse with paint thinner, and dry with

compressed air.

6-7. REPAIRING DAMAGED THREADS .

If slight

3. in the case of new metal surfaces, wash with

thread damage is found on any threaded part, repair the

paint thinner and use abrasive blasting to remove

threads with a tap or die of the correct size, as follows:

remaining dirt, oil, casting sand, mill scale, slag, or other

1. Correct internal or tapped thread damage by

foreign material. Wash with paint thinner again after

carefully turning the correct size tap into existing

blasting.

threads. Carefully remove tap and inspect threads again

4. Apply paint and varnish remover with a good

to see if thread damage is still obvious. If so, the

bristle brush, stroking in one direction only. Brushing out

damage is too extensive to repair; discard the part.

causes rapid evaporation of the volatile solvents, thus

2. For damage to external threads, select a die of

decreasing the effectiveness of the remover.

correct size and carefully turn die onto existing threads.

5. Allow the remover to remain on the painted

Remove die and inspect threads. If damage is still

surface until the old paint begins to wrinkle and soften.

obvious; discard part.

After paint softens scrape or brush off.

6. Wash all traces of paint remover wax deposits

from surface with paint thinner.

6-2