6-34. PISTON AND CONNECTING ROD MAINTENANCE
(3) Connecting Rod
(TRUNK TYPE) (Cont)
Check connecting rod for visual damage. Scrap rod if bent, had previous bearing failure,
was overheated (blued) at top or bottom end, or fretted at split line between rod and cap.
Check for cracks by the magnetic particle method.
Overheated bushings may become loose and creep together, thus blocking off supply
of lubricating oil to piston pin and spray nozzle.
(c) Check connecting rod bushings for indications of scoring, overheating, or other damage.
Compressed air used for cleaning purposes will not exceed 30 PSI. Use
only with effective chip guarding and personal protective equipment
(goggles/shield, gloves, etc).
(d) Check spray nozzle at upper end of connecting rod for plugged holes. Blow compressed
air through drilled oil passage in rod to insure spray nozzle holes are open.
(e) Inspect connecting rod bearing bores for burrs or foreign particles. Clean up minor burrs
with crocus cloth using circular motion.