443XS145 / 21T-70-34171 Weld-On Center Adapter for XS145 System

The 443XS145 weld-on center adapter provides the mounting interface between a heavy mining bucket lip and replaceable XS145-series bucket teeth.

Designed as a Type 1 center adapter, it is intended for a nominal 4.75-inch or approximately 120–121 mm bucket lip. The adapter is commonly cross-referenced with HL443XS145 and Komatsu reference 21T-70-34171 for selected PC2000 bucket configurations.

A compatible WC145HX wear cap can be installed to protect the upper adapter surface from abrasive material flow. XS145-series teeth are fitted to the adapter nose and retained by the appropriate XS145P-series locking fastener.

The later Kprime functional cross-reference is 5120WP200 in the P200 system. However, XS145 and P200 components should not be mixed unless dimensional and system compatibility has been confirmed.

Machine model alone is not sufficient for final identification. Buyers should provide the existing part number, bucket-lip dimensions, machine serial number and photographs before ordering.

Key Features

• Reference numbers 443XS145 and HL443XS145

• Cross-reference to Komatsu 21T-70-34171

• Hensley-style XS145 Extreme Service system

• Heavy-duty center weld-on configuration

• Type 1 adapter profile

• Designed for a nominal 120–121 mm bucket lip

• Compatible with XS145-series tooth profiles

• Accepts XS145P-series tooth fasteners

• Compatible with WC145HX adapter wear cap

• Suitable for large mining excavator buckets

• Kprime functional cross-reference 5120WP200

• Suitable for bucket rebuilding and GET replacement

Application Range

Suitable for:

• Komatsu PC2000 mining excavator bucket configurations

• Large mining excavator buckets

• Heavy rock excavation

• Overburden removal

• Quarry and mine production

• Bucket rebuilding

• XS145 GET replacement

• New bucket fabrication using a compatible 120–121 mm lip

PC1850 applicability appears in some aftermarket sources but should be confirmed using the machine serial number and bucket drawing.