TM 9-2320-260-34-1
2-8. CLEANING (Contd)
WARNING
Improper cleaning methods and use of unauthorized cleaning
solvents may injure personnel and damage equipment. Refer to
TM 9-247 for correct information.
e. Castings.
(1) Clean inner and outer surfaces of castings, and all areas subject to grease and oil, with cleaning
solvents (TM 9-247).
(2) Use a stiff brush to remove sludge and gum deposits.
WARNING
Compressed air source will not exceed 30 psi (207 kPa). When
cleaning with compressed air, eyeshields must be worn. Failure to
wear eyeshields may result in injury to personnel.
(3) Use compressed air to blow out all tapped screw holes and to dry castings after cleaning.
f. Oil Passages. Particular attention must be given to all oil passages in castings and machined parts.
Oil passages must be clean and free of any obstructions.
(1) Clean passages with soft wire probes to breakup any sludge or gum deposits.
(2) Wash passages by flushing with solvents (TM 9-247).
(3) Dry passages with compressed air.
CAUTION
Do not allow drycleaning solvents to come in contact with seals,
cables, or flexible hoses. These solvents cause leather, rubber, and
synthetic materials to dry out, rot, and lose pliability, making
them unserviceable.
g. Oil Seals, Electrical Cables, and Flexible Hoses. Clean with soap and water.
h. Bearings.
(1) Bearings require special cleaning. After removing surface oil and gum deposits, place bearings in
hot oil 140F (60C) to loosen congealed oil and grease. Wipe bearings dry; do not use compressed air. After
cleaning, coat bearings with oil, wrap in paper, and hold for inspection.
(2) Refer to TM 9-214 for information on care of bearings.
WARNING
Drycleaning solvent is flammable and will not be used near open
flame. Use only in well-ventilated places. Failure to do so may
result in injury to personnel.
i. Machine Tooled Parts. Clean with drycleaning solvent and dry with compressed air.
j. Machined Surfaces. Clean with drycleaning solvent and dry with lint-free cloth.
2-34
