Do not use soap or alkalies for cleaning tank interiors.
k. Fuel Tank. Pay special attention to all warnings and cautions when working on vehicles fuel tank. Fuel tanks
should be flushed, using a spray gun and Dry Cleaning Solvent P-D-680 (Item 80, Appendix C).
Battery acid (electrolyte) is extremely harmful. Always wear safety goggles
and rubber gloves and do not smoke when performing maintenance on
batteries. Injury will result if acid contacts skin or eyes. Wear rubber apron
to prevent clothing being damaged.
l. Battery. Exterior surfaces of the electrical system and battery should be cleaned with a weak solution of baking
soda and water. Apply solution with a bristle brush to remove any corrosion. Pay special attention to all warnings
and cautions when working on batteries.
m. Hydraulic System. When cleaning hydraulic system parts use Dry Cleaning Solvent P-D-680 (Item 80,
Appendix C). Clean and dry parts thoroughly to make sure no residue remains. If a coating of preservative is
required before assembly, apply a light film of lubricating oil (Item 41, Appendix C).
2-21. GENERAL INSPECTION INSTRUCTIONS
a. Cleaning. Clean all parts before inspection. Check for defects such as physical distortion, wear, cracks, and
b. Sealing Surfaces. Inspect all surfaces in contact with gaskets, packings, or seals for nicks and burrs. If any
defect is found, remove it before assembly.
c. Bearings. Inspect bearings for rusted or pitted balls, races, or separators. Inspect balls and races for brinelling,
abrasion, and serious discoloration. The following are conditions for bearing rejection:
Cuts or grooves parallel to ball or roller rotation.
Fatigue pits (not minor machine marks or scratches).
d. Gears and Splined Shafts. Inspect gears and splined shafts for wear, pittings, rolling, peening, scoring,
burning, brinnelling and fatigue cracks.
e. Tubing and Hoses. Inspect all hose surfaces for broken or frayed fabric. Check for breaks caused by sharp
kinks or contact with other parts of the vehicle. Inspect copper tubing lines for kinks. Inspect fitting threads and
mating surfaces for damage. Replace any defective part. After assembly and during initial vehicle operation period,
check for leaks.
f. Electrical Parts. Inspect all wiring harnesses for broken, chafed, or burned wiring. Inspect all terminal
connectors for loose connections and broken parts.
g. Metal Parts. Visually inspect all castings and weldments for cracks. Parts that carry a great load should receive
magnetic particle inspection. Critical non-ferrous parts may be inspected with fluorescent penetrant.