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 TM 55-1905-223-24-3
FIGURE 4-32. Fillet Radius.
(b) A maximum of 0.0625 inch (1.587 mm) material can be cut from the pad to repair the radius.
(c) Remove any sharp edges from the pad.
c.
Clean and inspect the pistons.
CAUTION
To avoid damage to the pistons, make sure the cleaning solvent is approved
for aluminum. Refer to Federal Specification PD-680.
(1)
Allow the piston to soak for a minimum of 30 minutes in a tank containing an approved
cleaning solvent for aluminum.
(2)
Use a hot, soapy solution and a nonmetallic brush to remove carbon deposits.
CAUTION
Do not use a metal brush. A metal brush will damage the piston ring
grooves. Do not use glass beads to clean the grooves. Walnut shell
blasting may be used on grooves with a ni-resist insert and on the dome of
the piston.
Use the minimum effective pressure and do not concentrate the spray in
one area for an extended period of time.
Do not use walnut shell blasting on the pin bores or aluminum grooves.
This can damage pin bore surface finish or prevent the rings from seating
correctly in the grooves.
4-77
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