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TM 9-2320-364-34-4
20-150
20-52. VALVE SEAT INSERT REPAIR (CONT).
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.
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.
(1)
Clean all parts with drycleaning solvent.
(2)
Dry all parts with compressed air.
(3)
Inspect valve seat insert counterbore for cleanliness, concentricity, flatness and cracks.
(4)
Inspect valve seat insert counterbore for diameter of 1.440 to 1.441 in. (3.658 to 3.660 cm) and a depth of
0.3395 to 0.3505 in. (0.862 to 0.890 cm).
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