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 TM 55-1905-223-24-4
CLEANING
a.
Soak pistons over night in cleaning solvent to loosen carbon deposits.
b.
Wash pistons and rods in a strong solution of laundry detergent in hot water.
CAUTION
Do not clean pistons and rods in an acid tank or use bead blaster.
c.
Clean remaining deposits from the ring grooves with the square end of a broken ring.
CAUTION
Do NOT use a ring groove cleaner and be sure not to scratch the
ring sealing surface in the piston groove.
WARNING
COMPRESSED AIR HAZARD. High pressure compressed air
tanks, piping systems and air operated devices can cause serious
injury to eyes and exposed areas of skin due to escaping air
pressure.
d.
Wash pistons again in a detergent solution or solvent. Rinse, then use compressed air to dry.
INSPECTION
a.
Inspect pistons for damage and excessive wear. Check the top (1, FIGURE 4-35), ring grooves (2). skirt
(3) and pin bore (4).
FIGURE 4-35. Inspecting Pistons.
4-31
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