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.
AUGUST 31, 2008 CHAPTER 3 OVERHAUL
PAGE 2 1 GENERAL REPAIR
M100 Tow Tractor Manual No. 46052
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