CATERPILLAR MT645B TRACTOR

Tier 2 with Serial Number P130069 and Above, Tier 3

Steel Line

Tier 2
Tier 3 Serial Number T079034 and Below

Tier 3 Serial Number T079034 and Above

With Manual A/C

With Automatic A/C

4 Groove
Fits Aftermarket Compressor 509-6393

4 Groove
Fits Original Sanden 509-6392

Includes 509-639 - 4 Groove Clutch
Kit Includes Compressor, Receiver Drier, Expansion Valve, and O-Rings

Can Use Aftermarket Kit 890-63913

4 Groove
Can Use Aftermarket Compressor 509-6393

Non-Serviceable Serpentine Design
Must Use Original Brackets

OE Serpentine, Non-Serviceable Design

With Automatic A/C

Can use Alternative Version - 803-3271

Can use HD Dry-Tech Drier - 803-327

With Automatic A/C

With Manual A/C