Fault Phenomenon: XCMG TY160 dozer blade cutting edge is loose, bolts cannot be tightened.

Troubleshooting Process:
– Checked bolt holes: holes in blade body worn into an oval shape.
– Checked bolts: bolts sheared and deformed.
– Checked material: local hardness of blade insufficient.
– Checked operation: prolonged overloading pushing hard materials.

Root Cause: The blade cutting edge mounting bolt holes were worn and elongated due to long-term impact loads and bolt loosening, making it impossible to secure the cutting edge.

Required Parts: Repair blade body (bushing or build-up weld and re-drill) or replace blade assembly.