Graco 112593 Pin

Compatible Machines & Models

• Graco Displacement Pump Series (e.g., 3:1 ratio pump heads)
• Graco Displacement Pump Series (5:1 ratio pump heads)
• Graco Displacement Pump Series (7:1 ratio pump heads)

Graco 112593 Pin – Precision Ball Stop Component

The Graco 112593 Pin is a precision ball‑stop component for airless sprayer systems. Crafted from premium stainless steel, it delivers reliable performance in high‑pressure environments and ensures flawless fluid control in professional coating applications.

• OEM‑quality replacement for Graco ball stop pin
• Precision machining ensures tight seal and accurate spray control
• Corrosion‑resistant stainless‑steel construction

Easy to install and maintain, the 112593 Pin boosts operational uptime and reduces wear on internal components. Its compact size and precision fit ensure a leak‑free seal, while the corrosion‑resistant design withstands harsh job‑site conditions. When paired with other sprayer accessories, it offers unmatched reliability for high‑volume spraying tasks.

Technical Overview

This component functions as the critical retention pin inside the check‑ball assembly in applicable Graco pump heads. The pin secures the check‑ball, preventing reverse flow and maintaining consistent pressure thresholds. It is listed as part number 112‑593 in OEM documentation.

Key specifications:

By using this pin, you improve pump efficiency (field tests show up to ~7% improvement) through reduced hydraulic back‑flow and better ball seating.

Installation & Maintenance Tips

• Before installation, clean the bore interface thoroughly and apply a minimal amount of high‑temperature grease to the pin.
• Pre‑load the check‑ball at ~1,000 psi to confirm proper seating before full system pressurization.
• Inspect the pin tip for scuff marks, check bore wear, and verify the check ball hardness periodically.
• Recommended replacement interval: every ~1,500 operational hours for heavy‑duty applications.

Frequently Asked Questions