Graco 15G639 Hydraulic Motor/Pump Adapter

Adapter – Model 15G639 (Hydraulic Motor/Pump)

The 15G639 ADAPTER, HYDR. MOTOR/PUMP is a precision-engineered component designed to seamlessly integrate the hydraulic motor and pump assembly in your industrial spray system. Built to exacting standards, it aligns the mounting interfaces, ensures proper coupling and maintains optimal fluid flow while withstanding high-pressure and heavy-use environments.

Typical Applications

Ideal for heavy-duty cart or rig-mounted sprayers, this adapter is used in systems where a hydraulic motor drives the pump. It serves as a critical structural and fluid-path component, aligning the motor and pump, and supporting high-performance operation under continuous loads.

Key Specifications

Product Highlights

• Ensures precise alignment between hydraulic motor and pump for smooth, vibration-free operation.
• Robust design engineered for high-pressure fluid systems and demanding application environments.
• Direct OEM-style replacement to restore factory performance and reliability.
• Supports efficient fluid coupling and minimizes potential for mis-alignment or premature wear.

Installation Guidelines

Prior to installation, shut down the equipment and relieve system pressure. Remove the existing adapter or coupling, clean the mounting surfaces thoroughly, and inspect all bolt holes and sealing surfaces for integrity. Position the 15G639 adapter to align the motor and pump shafts correctly, install and torque the associated bolts to manufacturer specification, then reconnect fluid lines and check for alignment, leaks and smooth rotation before returning to service.

Maintenance & Care

• Periodically inspect the adapter for signs of fatigue, mis-alignment or mounting bolt loosening.
• Check coupling interfaces and motor/pump alignment during scheduled maintenance to prevent vibration-induced wear.
• Keep the area free from excessive overspray, debris or buildup that might interfere with bolt access or alignment surfaces.

Frequently Asked Questions