Before you start a task, think about the risks and hazards to your personal safety and the safety of others. Wear
protective gear such as safety goggles or lenses, safety shoes, rubber apron, or gloves. Protect yourself against injury.
When lifting heavy parts, have someone help you. Make sure that lifting/jacking tool is working properly, that it meets
the weight requirement of the part to be lifted, and that it is securely fastened to the part.
Always use power tools carefully.
Observe all WARNINGs and CAUTIONs found in this manual.
Before you begin a task, you should find out how much repair, modification, or replacement is needed to fix the
equipment as described in this manual. Sometimes the reason for equipment failure can be seen right away, and
therefore complete teardown is not necessary for repair. Disassemble equipment only as far as necessary to repair or
replace broken parts.
All tags and forms attached to the equipment must be checked to learn the reason for removal from service. Also,
check all Modification Work Orders (MWO) and Technical Bulletins (TB) for equipment changes and updates.
In some cases you may damage a part just by removing it. If the part appears to be good, and other parts behind it are
not defective, leave it on and continue with procedure.
Here are a few simple rules:
Don't take out dowel pins or studs unless loose, bent, broken, or otherwise damaged.
2. Don't pull bearings or bushings unless damaged. If you have to get at parts behind them, pull off bearings or
bushings very carefully.
3. Replace all gaskets, seals, and O-rings.
All parts should be cleaned before inspection and assembly and after repair. Wipe off dirt, grease, and grime from
parts before removal.
Dry cleaning solvent P-D-680 is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame or
excessive heat. The solvent's flash point is 100F - 138F (38C - 59C). If you
become dizzy while using cleaning solvent, immediately get fresh air and medical
help. If solvent contacts eyes, immediately wash your eyes and get medical aid.
Compressed air used for cleaning or drying purposes, or for clearing restrictions,
should never exceed 30 psi (207 kPa). Wear protective clothing (goggles/shield,
gloves, etc.) and use caution to avoid injury to personnel.
Clean inside and outside surfaces of metallic parts and all areas that get greasy and oily with dry cleaning solvent
(Item 13, Appendix E). Clean out sludge and gum with stiff brush. Put small metal parts in a wire mesh basket before
dipping in dry cleaning solvent. Use steam cleaning to take off grease and dirt build-up after dry cleaning solvent has
been applied. Dry parts with clean dry rags. Clean off rust on metallic parts with a wire brush, abrasive cloth, or
sandpaper. Use low pressure compressed air to clear away rust, cloth particles, and sand.
Clean bearings and bearing cups in accordance with TM 9-214, Inspection, Care, and Maintenance of Antifriction