GENERAL MAINTENANCE PROCEDURES-continued

TM 5-4210-233-14&P-1

4-9. GENERAL MAINTENANCE PROCEDURES- Continued

h. Lowering the Truck.

(1) Place 10 ton hydraulic jack beneath differential. Raise the jack until all weight is off maintenance

trestles.

(2) Remove maintenance trestles from beneath axle (one on each side of differential).

(3) Carefully and slowly, lower jack until all weight is removed from jack. Immediately after truck is

grounded, chock the wheels.

(4) Repeat steps 1 through 3 to lower other axle as necessary.

(5) Ensure gear selector is positioned to N (neutral) and parking brakes are applied, then remove all

wheel chocks.

i. Identification. Identify all parts of similar shape with tags. This will make proper reassembly easier. Be

sure to identify ends of electric, hydraulic, and air lines as they are disconnected.

j. Salvage.

Some assemblies that are removed, even though defective, shall be treated as valuable

items. They may be rebuilt for future use.

k. Expendable Parts.

Whenever possible, all gaskets, packings, and seals shall be discarded during

removal or disassembly. Similarly, lock wire, lockwashers, cotter pins, and like items shall be discarded

during disassembly. All should be replaced during assembly. When removing seals, gaskets, or packings,

take care not to damage (e.g. scratch) the sealing surfaces. If surfaces are damaged they must be

repolished to give a good sealing surface.

I. Parts Protection. To prevent moisture and dirt from entering housings, lines, and other openings, apply

protective covers after disassembly. Wrap all parts in clean paper or dip parts in rust preventive oil.

4-9.2. General Cleaning Instructions

CAUTION

Do not use scrapers, wire brushes, abrasive wheels, or

compounds when cleaning parts unless called for in detailed

instructions. These procedures may alter size of machined

surface and may weaken a stressed part.

a. Dry Cleaning Solvent.

WARNING

Dry cleaning solvent P-D-680 (safety or Stoddard's solvent) is

potentially dangerous. Avoid repeated and prolonged breathing

of vapors and skin contact with the liquid. Do not use near open

flame, arcing equipment or other ignition sources. Always wear

eye protection and protective clothing. The flash point of P-D-

680 is 1 00 to 138 deg. F (38 to 59 deg. C).

Whenever dry cleaning solvent is recommended for cleaning, use item 3, Appendix E.

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