General Inspection

TM 10-3930-633-34

bristly brush to remove any corrosive buildup on

are removed to prevent damaging races and balls.

the battery cable clamps and terminals and

When bearings have been cleaned, spin them

battery tray.

immediately in light lubricating oil to remove

solvent.

i. When cleaning h y d r a u l i c s y s t e m c o r n -

b. Do not clean preformed packings or other

ponents, use petroleum-free solvents. Clean and

rubber parts in dry cleaning solvent. These parts

dry parts thoroughly to make sure that no residue

remains. If a coating of preservative is required

should be wiped clean with a clean, dry, lint-free

cloth.

prior to reassembly, apply a light film of

c. Prior to disassembly of the vehicle, the

preservative oil, Military Specification MIL-O-

6083. If petroleum-free solvents are not available

e x t e r i o r parts of the equipment should be

for cleaning, use hydraulic fluid compatible with

thoroughly cleaned to remove accumulated mud,

tar, and grease. This procedure will facilitate

that used in the vehicle system.

inspection and disassembly. For cleaning exterior

CAUTION

Do not use gasoline or other petroleum

parts, use a vapor pressure spray rinse cleaner.

d. For cleaning the exterior of the engine,

base products to clean or preserve

frame and hoods, use Gun, Engine, Kerosene

hydraulic system components.

j. Wash painted surfaces of vehicle with a

Spray, Stock No, 7900-402730, or equivalent. Use

solution consisting of lb of soap chips, Federal

Compound, Aircraft Cleaning, Military

Specification P-S-579, to 1 gallon of water.

Specification MIL-C-25769, in a mixture con-

sisting of one part compound with four to nine

2-8. General Inspection

parts dry cleaning solvent, Federal Specification

a. Examine bearings for rusted or pitted balls,

P-D -680. Allow application to remain on item

races, or separator. Examine balls and races for

surface for approximately 10 minutes before

brinnelling, abrasion, and serious discoloration.

rinsing. Rinse with hot or cold water under

The following are causes for bearing rejection.

pressure. If available, use hot water under 80 to

(1) Cuts or grooves parallel to ball or roller

120 pounds pressure. An ordinary garden hose

rotation.

with nozzle may be used if other equipment is not

( 2 ) Fatigue pits (as opposed to minor

available. Rinse thoroughly.

machine marks or scratches).

CAUTION

(3) Cracks detected during magnetic particle

Do not clean tires, lubricant seals,

inspection.

rubber hoses, or electrical components

NOTE

with preceding cleaning agent.

Excluding defects which may cause bearing binding

e. Electrical parts, such as coils, junction

or misalignment, nicks or gouges outside race load

blocks, switches, and wiring, incorporating in-

areas are not cause for rejection.

sulating materials should not be soaked or

b. Inspection consists of checking for defects

sprayed with cleaning solutions. Clean these

such as physical distortion, wear, cracks, and

parts with a clean, lint-free cloth moistened with

pitting, and checking dimensions of parts for

dry cleaning solvent, Federal Specification P-D-

compliance with maximum wear limits data.

680.

Parts subjected to heavy load or pressure shall be

f. Oil and fuel tanks and similar reservoirs

inspected more thoroughly by performing surface

should be flushed, using a spray gun and dry

t e m p e r , magnetic particle, or fluorescent

cleaning solvent.

penetrant procedures where necessary. Clean all

CAUTION

parts before inspection.

Do not use soap or alkalies for cleaning

c. When removing drain plugs from trans-

tank interiors.

mission, engine, or hydraulic system com -

g. The cooling system radiator core should be

ponents, inspect the sediment adhering to the

cleaned with steam or hot water. If sediment

plug. Accumulations of grit and/or fine metal

within the core cannot be completely removed by

particles may indicate actual or potential com-

this method, the core may be boiled in a solution

ponent failure. A few fine particles are normal.

of sodium carbonate and water. Use a solution of

T h i s inspection is effective in determining

o n e pound o f s o d i u m carbonate, Federal

defective parts prior to internal inspection of the

Specification O-S-571, to each gallon of water.

component, and to predict degradation of the

Flush with clean, hot water, or steam.

equipment.

h. The electrical system battery exterior

d. Gears should be inspected upon removal for

surfaces should be cleaned with a weak solution of

the following conditions: -

baking soda and water. Apply the solution with a

2-8