TM 9-2320-363-34-2
C A U T I O N
Do not use crocus cloth to polish or refinish piston pin to prevent damage to
equipment.
IF PISTON PIN (6) SHOWS SIGNS OF FRETTING, OVERHEATING, OR IS WORN TO DIAMETER
OF 1.77 IN. (44.96 mm), REPLACE PISTON PIN.
REPLACE CONNECTING ROD IF SUBJECTED TO ANY OF THE FOLLOWING:
7.
8.
VISUAL DAMAGE (BENT).
PREVIOUS BEARING OR RELATED FAILURE.
CONNECTING ROD BLUING AT TOP OR BOTTOM END.
FRETTING AT SPLIT LINE BETWEEN CONNECTING ROD AND CONNECTING ROD CAP.
EXCESSIVE POUND-IN OF ROD BOLT HEADS, NUTS, OR PISTON PIN BOLT AND SPACER.
CHECK CONNECTING ROD BOLTS AND CONNECTING ROD CAP NUTS FOR THREAD
DAMAGE OR FRETTING ON UNDERSIDE OF HEADS. REPLACE ROD BOLTS AND
CONNECTING ROD CAP NUTS IF EITHER CONDITION IS PRESENT.
UNUSUAL CYLINDER WEAR PATTERNS.
GOUGES, NICKS, OR BURRS ON MACHINED SURFACE OF CONNECTING RODS AT PISTON
PIN END.
MEASURE
READINGS
CONNECTING ROD BORE AT POINTS A, B, AND
MUST BE WITHIN 3.594-3.595 IN. (91.288-91.313 mm).
C. AVERAGE OF BORE
12-151