Fix Low Pressure and Slow Fill: A Practical Troubleshooting Guide Is your air compressor taking forever to reach "cut-out" pressure? Low pressure and slow fill times … read more Feb 10, 2026 Master Tool Repair
What’s That Hiss? Demystifying the Unloader Valve’s Role If you own an air compressor, you’ve heard it: that sharp psshhh sound the moment the motor shuts of … read more Feb 3, 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
