Bucket Teeth Replacement Guidelines

Bucket teeth are wear parts, and timely replacement can prevent wear on the bucket lip and tooth adapter, while maintaining digging efficiency (severely worn bucket teeth will increase digging resistance and raise fuel consumption by 10%-20%). The replacement is judged primarily by wear degree and operational performance, with no professional tools required:

1. Visual Wear Judgment (Visual Inspection, Easiest to Operate)

Replacement is mandatory when wear reaches the following levels, classified by wear ratio:

• The wear at the bucket tooth tip exceeds 50%, or the tip is worn flat and rounded, making it unable to penetrate soil/rock;

• The stressed surfaces on both sides of the bucket tooth are worn through with holes or cracks, or the connection part with the tooth adapter is worn and deformed, failing to fit snugly;

• Transverse or longitudinal cracks appear on the bucket tooth—even small cracks require immediate replacement (cracks will expand rapidly under impact during operation, and loose bucket teeth may damage the bucket/cylinders);

• The pin/circlip falls off, the pin hole becomes worn and enlarged, causing the bucket tooth to loosen or wobble on the tooth adapter and produce a clanking noise during operation.

2. Operational Performance Judgment (Efficiency Check, Invisible Wear)

If there is no obvious severe wear in appearance but the following situations occur, the bucket teeth are excessively worn and need replacement:

• Digging resistance increases significantly—under the same working conditions, the excavator’s rotational speed rises and fuel consumption increases, yet it fails to dig through soil/rock;

• Material leakage occurs during loading, with soil/sand leaking through the gaps between bucket teeth and the bucket filling rate dropping sharply;

• Bucket teeth tend to slip during digging, unable to effectively penetrate the working medium, requiring repeated adjustments of the bucket angle.

3. Replacement Principle: Replace in Pairs, No Make-do Repairs

• When the wear degree of bucket teeth on the same bucket differs by more than 30%, replace them in pairs (on the same side/all of them) to avoid excessive stress on a single bucket tooth that may cause fracture or tooth adapter wear;

• If only a single bucket tooth is slightly worn, swap it with a lightly worn one on the other side of the bucket for even utilization and cost reduction;

• If the tooth adapter is worn, deformed or cracked, replace the tooth adapter first before installing new bucket teeth. Otherwise, the new bucket teeth cannot fit snugly, which will accelerate wear and loosening.