TM 10-3930-675-24-2
PISTON AND CONNECTING ROD MAINTENANCE - CONTINUED
0273 00
INSPECTION - CONTINUED
9.
Using new piston ring and thickness gage, inspect piston ring grooves for wear as follows:
a.
Hold new piston ring in ring groove.
b.
Insert 0.006 in. (0.15 mm) thickness gage into ring groove. If thickness gage enters without resistance, there is too
much wear. Replace piston.
NEW
PISTON
PISTON
RING
RING
GROOVES
THICKNESS
GAGE
PISTON CROWN
10.
Measure piston pin bore inside diameter in both crown and skirt as shown. Measurement for crown should be 2.1276 to
2.1281 in. (54.040 to 54.055 mm) and for skirt 2.1263 to 2.1266 in. (54.007 to 54.015 mm). If measurement is not
within specification, replace defective component.
CROWN
SKIRT
INSIDE DIAMETER, PISTON PIN BORES
0273 00-10
