The most critical interface is between the outer diameter of the bushing and the sprocket teeth, and between the inner diameter of the bushing and the pin. As the track flexes, the pin rotates slightly inside the bushing. The hardened surfaces of both parts resist this wear.
Measurable Parameter: The key service parameter is bushing OD wear. Caterpillar provides a "wear limit" specification (e.g., a reduction in diameter of 6-8 mm). When wear exceeds this limit, the sprocket will not engage properly, leading to accelerated undercarriage wear and potential track derailment.
This 234-3931 pin is used for 325D 329D 329D2 330D2 330 330GC excavator.
Related part number:
8T-5460
234-3931
093-0349
8T-4123
234-3931
093-0349
8T-4123
