1.1.4 Using Compressed Air
Use low-pressure compressed air to remove debris and dirt as necessary.
1.1.5 Frame, Engine, and Transmission
NOTICE! Be sure all openings are closed or covered adequately before cleaning to
prevent the entry of water into internal parts.
Structural parts are best cleaned using soap and water and suitable brushes. Steam
cleaning may also be done before disassembly to remove heavy accumulations of grease,
oil, and dirt from exterior of engine, transmission and rear axle assembly.
1.1.6 Metal Parts
Wash metal parts in an appropriate cleaning solvent. Allow to air dry. Do not use
compressed air to dry parts. The moisture generally present in air systems may cause
corrosion. Lubricate metal parts as soon as possible after cleaning.
1.1.7 Bearings
Wash bearings in a bearing washer or immerse in solvent and scrub clean with a soft
brush. Remove all grease and oil from bearing recesses. Allow to air dry. Apply a thin film
of lubricating oil to bearings and check for free movement between inner and outer race.
Worn bearings must be replaced.
1.1.8 Gears
Clean gears using a soft bristle brush and cleaning solvent. Remove foreign matter from
the gears.
1.1.9 Inspecting Parts
Inspect all parts visually for cracks, breaks, scratches, dents, bends, punctures, galling,
wear, scoring, stripped threads, distortion and deformation. Give special attention to
bearing surfaces, mating surfaces, gaskets and seals. Specific dimensional checks and
tests are given where required.
1.2 REPAIR AND REPLACEMENT
1.2.1 Structural Parts
Structural parts, enclosing, and supporting members may be repaired by welding, brazing
and refinishing. Major repairs should be performed by overhaul facilities. Where repainting
is required, the surface should first be suitably prepared and primed.
1.2.2 Wiring
Wiring should be repaired in accordance with standard automotive practices.
AUGUST 31, 2008 CHAPTER 3 OVERHAUL
PAGE 2 1 GENERAL REPAIR
M140 Tow Tractor Manual No. 46054
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