TM 9-4940-568-34
7-39
b.
Cleaning/Inspection.
Drycleaning Solvent (P-D-680) is TOXIC and flammable. Wear protective goggles, face
shield, and gloves; use only in a well-ventilated area; avoid contact with skin, eyes, and
clothes, and do not breathe vapors. Keep away from heat or flame. Never smoke when
using solvent. The flashpoint for Type II Drycleaning Solvent is 140 degrees F (60 degrees
C) and Type III Drycleaning Solvent is 200 degrees F (93 degrees C). Failure to do so may
result in injury or death to personnel.
If personnel become dizzy while using cleaning solvent, immediately get fresh air and
medical help. If solvent contacts skin or clothes, flush with cold water. If solvent contacts
eyes, immediately flush eyes with water and get immediate medical attention.
Do not sandblast or use wire brush to clean carbon deposits from piston skirt. Damage
to parts may occur.
(1)
Clean carbon deposits from all ring grooves using soft bristle brush and drycleaning solvent.
(2)
Clean oil drain holes in piston skirt using brush and drycleaning solvent.
(3)
Clean all metal parts, except connecting rod and piston pin with drycleaning solvent.
Fuel is very flammable and can explode easily. To avoid serious injury or death, keep
fuel away from open fire and keep fire extinguisher within easy reach when working
with fuel. Do not work on fuel system when engine is hot. Fuel can be ignited by hot
engine.
(4)
Clean connecting rod and piston pin with diesel fuel.
(5)
Using a nylon bristle brush, clean oil drillings on the connecting rods.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only
with effective chip guarding and personal protective equipment (goggles/shield, gloves,
etc). Failure to comply may result in injury or death to personnel.
(6)
Dry all parts with compressed air.
(7)
Inspect all parts for nicks, burrs or
scratches. Replace all damaged parts.
(8)
Inspect piston skirt and piston crown for
score marks, cracks, or damaged ring
grooves.
(9)
Using a nylon bristle brush, clean oil
drillings on connecting rods.
