Section VII. INSPECTION, TESTING, AND TABLE OF LIMITS

TM 10-3930-623-34

SECTION VII

INSPECTION, TESTING, AND TABLE OF LIMITS

GEARS .

Inspect gear bodies, teeth, bores,

7-1. SCOPE OF SECTION.

7-8.

keyways, and splines for burrs, scratches, raised metal,

7-2. This section contains instructions for inspection,

cracks, and excessive wear. Remove minor defects with

adjusting, and testing of various components and

a fine grit hone. Replace worn or defective gears.

assemblies of the truck. Figure 7-1, Table of Limits,

supports engine inspection procedures; Figure 7-2,

7-9. SHAFTS. Inspect bearing, gear, and bushing

Torque Values for Threaded Items, gives tightening data

surfaces of each shaft for wear or pitting. Inspect

to be used on installation of components; Figure 7-3,

keyways, splines, and threads of shafts for damage and

Table of Nondestructive Inspection Data, lists required

wear. Repair or replace shafts according to condition.

nondestructive inspection and related information.

Installation procedures are given for major assemblies

7-10. THREADS . Inspect all internal and external

normally removed at overhaul.

Completing these

threaded surfaces for stripped or crossed threads and

installation procedures will result in final assembly of the

other damage. Repair or discard defective items as

truck.

required. Repair threads in accordance with paragraph

6-7. Tighten threads in accordance with figure 7-2.

7-3. Inspection procedures generally consist of visually

noting obvious damage, wear or deterioration, or using

SPRINGS.

Inspect all coil springs for

7-11.

standard shop measuring tools such as micrometers.

deformation, loss of tension, wear, and other damage.

Test and adjustment procedures apply primarily to

assembled components. Inspection procedures used

7-12. GASKETED SURFACES ON HOUSINGS AND

need not be limited to those given in this section, as long

CASTINGS. Inspect all gasketed surfaces for burrs,

as procedure is appropriate and conforms to good

raised metal, nicks, and scratches. Remove minor

general shop practice.

No magnetic particle or

defects with a fine mill file. Discard any item which does

fluorescent penetrant inspections are specified by the

not permit a leak-proof seal.

truck manufacturer.

7-13.

HOUSINGS, FORGINGS, AND CASTINGS.

Inspect housings, forgings, and castings for cracks,

7-4. GENERAL INSPECTION PROCEDURES

thread damage, and deformation. Repair or discard

items as necessary.

7-5.

BALL NEEDLE AND ROLLER BEARING

ASSEMBLIES. Clean all bearings before inspection in

accordance with paragraph 5-12.

Inspect in the

7-14. SHEET METAL. Inspect all sheet metal for

following manner:

obvious damage such as dents, torn material, surfaces

weakened by excessive oxidation, and other types of

deterioration. Determine by inspection whether or not

1. Inspect bearing surfaces for rust deposits, deep

damage is beyond serviceable or repairable limits and if

scratches, deformation and improper number of balls or

each item is to be repaired or discarded.

needles. If any obvious deficiency is noticed, discard

bearing assembly.

7-15.

TRUCK EXTERIOR VISUAL INSPECTION.

Inspect truck exterior for signs of fluid leaks, damage of

2. Hold inner race between fingers and rotate outer

any type to the structure, and security of attachment of

race slowly. Note any binding or noise indicating internal

all external parts, such as wheels. Frequently inspect

damage. Discard worn bearing assemblies.

tires for imbedded nails or glass, deep cuts, uneven or

excessive wear, and underinflation.

3. Radial and thrust play on an unmounted bearing

must be very slight. Press inner and outer races toward

7-16. NONDESTRUCTIVE INSPECTION DATA. Refer

one another with light finger pressure. If movement is

to figure 7-3 for specific nondestructive inspection data

obvious, discard bearing assembly.

on components and assemblies. information in this

figure is supplemented in the following paragraphs.

7-6.

BEARING COUNTERBORES AND SEATS.

Inspect each bearing counterbore or seat for burrs,

7-17.

ENGINE COMPONENT INSPECTIONS AND

raised metal, scratches and corrosion. Remove minor

TESTS.

defects with a fine grit hone. Replace parts having

excessively damaged bearing counterbores or seats.

7-18. CARBURETOR INSPECTION.

1. Inspect carburetor body for cracks, damaged

Inspect for wear and

flanges, stripped threads, and other damage. Discard

7-7.

SLEEVE BEARINGS.

damage. Refer to figure 7-1 for allowable wear limits.

defective body.

7-1