Graco 158378 Packing O-Ring

Graco 158378 Packing O-Ring Overview

The Graco 158378 Packing O-Ring is a genuine OEM sealing component used in Graco air motors and pump assemblies. It prevents air or fluid leaks and maintains proper internal pressure for smooth operation.

Compatible Machines

This O-Ring fits the following Graco equipment:

• Graco President® Air Motors – various models requiring internal sealing O-Rings
• Graco Bulldog Sprayers – for pump/air motor sealing applications
• Graco Merkur Sprayers – internal O-Ring sealing in pumps
• Other Graco Fluid Handling Equipment – models that specify part 158378 in service manuals

Key Features

• OEM Quality: Genuine Graco part for reliable performance
• Sealing Efficiency: Prevents leaks and maintains air motor pressure
• Durable Material: Nitrile rubber construction for long service life
• Direct Replacement: Matches original specifications for proper fit

Technical Details

Installation & Maintenance Tips

• Verify your pump or air motor model before ordering to ensure proper fit.
• Inspect mating surfaces for wear or damage before installing the O-Ring.
• Replace O-Rings during routine maintenance to prevent leaks or loss of pressure.
• Always use genuine Graco parts for reliable and safe operation.

Frequently Asked Questions