Power Loss? How to Identify & Replace Worn Air Compressor Piston & Cylinder Kits If you’ve noticed your air compressor is taking longer than usual to reach full pressure, or if it s … read more Feb 25, 2026 Master Tool Repair
Just Got a New Air Compressor Pump? Master the Air Compressor Break-In Process! Congratulations! You’ve just upgraded your setup with a high-quality replacement pump. Whether you’r … read more Feb 17, 2026 Master Tool Repair
Description Specifications Fits Models 0 Reviews Description Rolair Motor Pulley Groove: Single-A Bore: 3/4" Outside Diameter: 4-5/16" View AllClose Specifications Model Number/ Cross Reference: 4090HK17, 6590HK18,5GR30HK17, RC4HK12 Groove: Single-A Bore: 3/4" Outside Diameter: 4-5/16" View AllClose Product Fitment View AllClose 0 Reviews View AllClose
