Graco 26C142 Piston Motor Repair Kit is a factory-engineered repair solution designed to restore the performance of Graco’s powerful Viscount II square housing hydraulic motors. Whether you operate in construction, industrial coating, or heavy-duty spraying, this kit ensures your equipment runs at full strength by replacing worn or damaged internal motor components. It includes the piston, retainer, and retaining ring—critical parts for maintaining motor integrity and long-term efficiency.
Graco hydraulic motors are built for reliability in tough environments, and over time, normal wear on moving parts like pistons and retainers can affect motor output. This kit is an OEM solution that restores hydraulic force, smooth operation, and reliability without the guesswork of mixing aftermarket parts. When installed correctly, it prevents leaks, improves pressure stability, and extends the service life of your equipment.
All three components are designed to work together, and replacing them as a set ensures precise tolerances and optimal performance.
This repair kit is commonly used in graco sprayers fitted with Viscount II hydraulic motors. These motors drive pumping systems in professional spray rigs, industrial coating lines, and other high-demand applications. When performance issues such as fluid leaks, weak hydraulic force, or erratic output arise, replacing the piston motor assembly with this OEM kit restores proper operation.
| Specification | Why It Matters |
|---|---|
| Correct Part Number | Always confirm the number 26C142 matches your service manual for compatibility. |
| Motor Compatibility | Specifically designed for Graco Viscount II square housing motors. Using the wrong kit can lead to improper fit or failure. |
| Material & Seal Fit | Ensure the hydraulic fluids and seals in your system are compatible with OEM tolerances. |
| Complete Kit Contents | Includes piston, retainer, and retaining ring—all required for a proper rebuild. |
| Housing Condition | Inspect the motor bore and guides; if they’re excessively worn, a piston kit alone may not fix performance issues. |
For service professionals, knowing how this kit fits into the bigger system is important. This kit directly supports repairs on airless paint sprayer parts that rely on hydraulic motors for pumping force. When servicing equipment, it’s helpful to reference the graco paint sprayer parts diagram to correctly identify the piston assembly, retainer, and retaining ring. This ensures accurate disassembly and reassembly, minimizing downtime and avoiding costly rework.
How do I know it’s time to replace the piston motor components?
Signs include reduced hydraulic output, fluid leaks, increased noise, or uneven pressure delivery. Regular inspections during scheduled maintenance can help catch these issues before they cause larger failures.
Can I use aftermarket alternatives instead?
While some non-OEM parts exist, they often lack Graco’s precise tolerances. Using genuine kits ensures long-term reliability, maintains warranty protection, and prevents improper sealing or fit issues.
Will this kit work for all hydraulic Graco motors?
No. It is specifically engineered for Viscount II square housing hydraulic motors. Always confirm compatibility in your equipment’s service manual.
Hydraulic motor performance ties directly into pump function, which is why this kit is essential when dealing with graco pump parts. Over time, pump output issues often trace back to hydraulic motor wear. Replacing the piston, retainer, and retaining ring allows the motor to deliver consistent drive power, directly improving pump reliability and spray quality. For customers performing a full system repair, pairing this with a graco paint sprayer pump repair kit ensures the entire hydraulic and pumping system is refreshed for peak operation.
If you depend on professional spraying equipment, this repair kit isn’t just a maintenance item—it’s an investment in uptime and quality. Many contractors and technicians rely on their equipment daily, and unexpected failures can delay jobs and increase costs. Having access to OEM paint sprayer parts like the Graco 26C142 kit ensures you can service your equipment quickly, confidently, and effectively.
The Graco 26C142 Piston Motor Repair Kit is the complete OEM solution for restoring Graco Viscount II square housing hydraulic motors. By replacing the piston, retainer, and retaining ring as a matched set, you ensure maximum performance, reduced downtime, and long-term reliability. Whether you’re a contractor, technician, or equipment manager, investing in genuine Graco parts protects your equipment and keeps your projects running smoothly. Order today from SprayersAndParts.com to take advantage of competitive pricing and dependable service.
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