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Section VI. General Repair and Cleaning Method
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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General Cleaning Instructions -680640109
TM 5-2420-224-20-1
GENERAL
CLEANING
INSTRUCTIONS
WARNING
Drycleaning solvent P-D-680 is toxic and flammable. Wear protective
g o g g l e s and gloves and use only in well-ventilated area. Avoid contact with
s k i n , eyes, and clothes and do not breathe vapors. Do not use near open
flame  or  excessive  heat.  Flash  point  is  100  -1380 F  (38-50C).  If  you
become dizzy while using drycleaning solvent, get fresh air immediately and
g e t medical aid. If contact with eyes is made, wash your eyes with water
a n d get medical aid immediately.
N e v e r use gasoline to clean parts. Gasoline is highly flammable. Serious
personal injury could result if fuel ignites during cleaning.
CAUTION
Petroleum solvents may damage parts that are in contact with hydraulic
fluids.
To prevent damage to equipment, do not clean tires, lubricant seals, rubber
h o s e s , or electrical components with solvent mixture.
1.
Cleaning Solvents. Use only approved cleaning solvents to clean parts. Drycleaning solvent
SD-2 (P-D-680) is commonly used. Always work in a well-ventilated area.
WARNING
T o prevent injury, compressed air used for cleaning and drying purposes will
n o t exceed 30 psi (207 kPa). Use only with effective chip guarding and
p e r s o n a l protective equipment (goggles/shield, gloves, etc.).
Removing Deposits. After soaking parts in solvent, wash away deposits by flushing or spraying.
2.
Where necessary, brush with a soft-bristle brush moistened in solvent. Use compressed air to
dry all parts, except bearings. Bearings must be allowed to air dry.
Tools. Do not use abrasive wheels, or compounds in cleaning parts, unless called for in
3.
detailed instructions. These procedures may weaken a highly stressed part.
4.
Ball and Roller Bearings. When cleaning ball or roller bearings, place them in a basket and
suspend them in a container of drycleaning solvent. If needed, use a brush to remove bearing
before solid particles are removed to prevent damaging races and balls. When bearings have
been cleaned, coat them lightly with lubricating oil to remove solvent. Refer to TM 9-214 for
additional instructions on cleaning bearings.
Rubber Parts. Do not clean rubber parts in drycleaning solvent. Clean by washing with a mild
5.
solution of soap and water. Wipe with a clean, dry, lint-free cloth.

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