TM-5-3805-254-34
TRUCK, DUMP, 20 TON, 6X4, ON-OFF HIGHWAY 71,000 GVW
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL
MARCH 1993
TM-5-3805-254-34 - Page 18 of 727
TM 5-3805-254-34
1-22.
FLUID DISPOSAL.
Dispose of contaminated drained fluids in accordance with the Standard Operating Procedures (SOP) of your unit.
1-23.
TRANSMISSION.
a. Follow these MAINTENANCE instructions when repairing transmission:
(1)
Handle transmission parts and subassemblies carefully to prevent nicking and scratching parts.
Parts that
fit together closely can bind if damaged.
Use extreme care to avoid damaging internal parts of control valve.
Parts that
depend on smooth surfaces for sealing may leak oil if nicked or scratched.
(2)
Do not use metal tools when removing gaskets and seals to avoid scratching metal sealing surfaces.
Use
pointed wood dowel to remove seals from grooves.
Use wood or plastic scrapers to remove gasket material from sealing
surfaces.
b. Follow these CLEANING Instructions when repairing transmission:
(1)
All parts must be clean to permit effective inspection.
At assembly, no dirt or foreign material can be
allowed to enter transmission.
Even small particles can cause malfunction of close-fitting parts, such as valves.
WARNING
•
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
100°F-138°F (380C-590C).
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.
•
Avoid contact with live steam.
Live steam can burn skin, cause blindness, and cause other
serious Injury.
Be sure to wear protective apron, gloves, and safety goggles when using live
steam.
(2)
All metal transmission parts, except bearings and clutch disks, should be cleaned thoroughly with dry
cleaning solvent (Item 23, Appendix B).
Large parts may be steam cleaned.
Do not use caustic soda solution when steam
cleaning.
WARNING
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.
(3)
Bearings should drip and air dry, then a thin coat of hydraulic fluid (Item 7, Appendix B) should be applied.
Parts may be wiped dry with clean lint-free wipes (Item 33, Appendix B) or allowed to air dry.
Parts with oil passages
should be dried with compressed air.
1-10
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