Graco 166055 Shaft Bearing

Quick Compatibility & Details

Compatible Machines

• Graco 5:1 Bulldog Pump — Model 206418 (Rubber-Packed)
• Graco 5:1 Bulldog Pump — Model 207321 (Rubber-Packed)
• Graco 5:1 Bulldog Pump — Model 206796 (PTFE-Packed)

Product Overview

Graco 166055 Bearing, Shaft is an OEM internal bearing used in selected Bulldog displacement pump assemblies to support and guide the pump shaft for smoother operation, reduced wear, and proper alignment.

Key Features

• OEM-grade fit and performance for the Bulldog 5:1 series listed above.
• Supports shaft alignment to minimize vibration and premature seal wear.
• Used in lower/displacement pump assemblies; reference your pump’s parts diagram before ordering.

Specifications

Fitment Guidance

• Match your exact pump model and serial with the service manual/exploded diagram.
• If your Bulldog pump parts list references 166055, this is the correct replacement.
• For other Graco pumps, confirm via the official parts lookup before purchase.

Installation Notes

• Depressurize system fully and follow safety procedures in the service manual.
• Inspect the shaft and housing for scoring or play; replace worn components.
• Install bearing squarely; verify correct orientation where applicable.
• Reassemble and test for smooth cycling and leaks.

Frequently Asked Questions