3-2. CLEANING (Continued)
Removing Dirt, Grease, or Oil. All parts must be thoroughly cleaned with dry cleaning solvent,
P-D-680 (Item 8, Appendix C), and kept clean during all maintenance procedures Use one of
the following methods to remove dirt, grease, or oil from all metal surfaces or parts:
Dip tank: Stir or shake parts fast for one minute in each tank.
Brush or scraper: Clean hard-to-get-at areas with a stiff-bristled brush or scraper.
Wipe with rags dipped in dry cleaning solvent.
Removing Gasket Material. Remove gasket material with a putty knife. Put a lint-free cloth
over open cavities to keep out gasket pieces
Cleaninq Bearinqs. Refer to TM 9-214.
Cleaninq Oil Passaqes Flush with dry cleaning solvent.
Removing Metal Particles. Flush all parts with dry cleaning solvent. Blow parts dry with
Also blow compressed air into all pockets, cavities, and passages to get rid of
trapped metal particles.
Cleaning Transmission Exterior. The exterior of the transmission must be thoroughly cleaned
before disassembly is started.
Use one of the following methods to remove dirt, oi1, grease, or
sludge from the exterior surface of the transmission.
To clean a slightly dirty transmission, wash with dry cleaning solvent and blow dry with
To clean an excessively dirty transmission, prepare an alkaline steam cleaning solution
10 pounds (4.536 kg) of tribasic sodium phosphate (Item 19, Appendix C)
50 gallons (189 liters) of water
Apply this solution with forced steam pressure at 50 psi (345 kPa).
Deqree of Cleanliness All parts must be clean enough to permit effective inspection Minute
particles left on close tolerance parts, such as valves, can cause transmission failure. Reclean
parts as necessary.