Failure rate of bucket continual fells.
Thicken tooth holder and front edge, change material from F10 to F11;
Add preheating process in manufacture of front edge;
Change non-welding position of tooth holder’s front-end from 30mm to 10mm;
Change welding method of reinforcing plate from intermittent welding to fully welding;
Increase thickness of base plate from 12mm to 14mm;
Use three ply wear-resisting board;
Optimize motion trail of bucket’s bottom, reduce the digging resistance;
Use five holes anti-loose connection for side tooth, more reliable.
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