TM-9-2320-272-23-3

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 3 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-3 - Page 1039 of 1469

CLEANING AND INSPECTION - Continued

6.

Inspect seal surface of spindle (Figure 3, Item 3) for rust, scratches, and grooves.

a.

If rusted, disconnect air line (Figure 3, Item 2) from air manifold fitting (Figure 3, Item 1).

WARNING

Eyeshields must be worn when cleaning with compressed air. Compressed air source

will not exceed 30 psi (207 kPa). Failure to comply may result in injury or death to

personnel.

b.

Using external air source, blow dirt and debris from seal surface of spindle (Figure 3, Item 3) by forcing

air through air manifold fitting (Figure 3, Item 1).

WARNING

Solvent cleaning compound is flammable and toxic. Do not use near an open flame and

always have a fire extinguisher nearby when solvents are used. Use only in well-

ventilated places, wear protective clothing, and dispose of cleaning rags in approved

container. Failure to comply may result in damage to equipment, injury, or death to

personnel.

c.

Thoroughly clean entire surface of spindle (Figure 3, Item 3) with solvent cleaning compound.

d.

Connect air line (Figure 3, Item 2) to air manifold fitting (Figure 3, Item 1).

CAUTION

Avoid filing too deeply in seal surface of spindle. Excessive filing may result in permanent

damage to spindle.

e.

Remove deep scratches by carefully filing seal surface of spindle (Figure 3, Item 3) in circular motion.

NOTE

It is unnecessary to remove the circular depression of a groove; only the raised portion

or lip.

f.

Using abrasive cloth, remove light surface scratches from seal surface of spindle (Figure 3, Item 3).

TM 9-2320-272-23-3

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