Graco 166531 Non-Metallic Washer – Replacement Part Details
Compatible Machines
- Graco Pump Model 226940 (Series B)
- Graco Pump Model 226941 (Series B)
- Graco Pump Model 226942 (Series B)
- Graco Pump Model 226947 (Series B)
- Graco Pump Model 226945 (Series B)
- Graco Pump Model 226951 (Series B)
- Graco Pump Model 237133 (Series A)
- Graco Pump Model 237134 (Series A)
- Graco Pump Model 237129 (Series A)
Product Overview
The Graco 166531 Non-Metallic Washer is a durable friction washer used inside valve and needle assemblies. Its non-metallic nylon construction helps reduce wear, protect metal surfaces, and maintain smooth adjustment during operation.
Key Features
- Non-metallic (nylon) material prevents metal-to-metal contact.
- Ensures smooth rotation in needle and valve assemblies.
- Helps maintain correct tension and seals during operation.
- Genuine Graco replacement part for long-term durability.
Why Use This Washer?
This washer is essential for maintaining correct performance in compatible Graco pumps. It reduces friction, prevents premature wear, and helps protect precision surfaces inside the pump’s valve assembly.
Installation Notes
Ensure the washer sits flat and properly aligned when reinstalling. Inspect nearby components such as the needle and packing for wear, and replace them if necessary for best performance.
Frequently Asked Questions
It acts as a friction washer inside the needle and valve assembly, helping reduce wear and enabling smooth adjustment.
No. It fits only the specific models listed in the Compatible Machines section. Always verify your pump model before ordering.
Replace it during valve or needle service, or if you notice excess friction, scoring, or inconsistent adjustment.
