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Graco 166210 Control Shaft

Graco 166210 Shaft, Control is the OEM internal shaft inside the control module. Use this when pressure adjustment feels loose or inconsistent—always verify fitment by your sprayer’s parts list.

  • Part #: 166210 (OEM)
  • Function: Drives the control/pressure adjustment mechanism
  • Location: Control box / control assembly
  • Fitment: Model- and revision-specific — confirm by manual/serial
  • When to replace: Play in control, uneven pressure, visible wear

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Overview & Compatibility

Graco 166210 Shaft, Control is a genuine OEM internal control-shaft used inside the control module/control box of select Graco airless sprayers. Compatibility is model-specific. Please verify against your sprayer’s parts list or serial number before ordering.

Key Specifications

Part Number 166210
Description Shaft, Control (OEM Graco)
Function Mechanical shaft within the control module that interfaces with the control mechanism to maintain/adjust pressure control.
Typical Location Control box / control assembly of the sprayer
Replaces/Alternate Use model-level parts list to confirm; varies by sprayer series and revision.
Authenticity Genuine Graco OEM component

Why Choose OEM 166210

  • Correct geometry for the control assembly ensures proper operation and longevity.
  • Maintains factory performance and reliability of pressure control.
  • Supported by model-specific service manuals and parts diagrams.

Fitment Verification (Do This Before Ordering)

  1. Locate your sprayer’s exact model and serial number.
  2. Open the model’s parts list/exploded diagram and search for “Shaft, Control” or the part number 166210.
  3. If your revision/year shows a different reference, match by the diagram reference number and assembly notes.

Installation Tips

  • Disconnect power and fully depressurize before service.
  • Follow your model’s control box disassembly sequence; note orientation of gears/bushings.
  • Inspect associated components (bushings, gears, potentiometer coupler) and replace if worn.
  • After assembly, perform a no-load pressure test and verify smooth adjustment.

Frequently Asked Questions

Use your sprayer’s model-specific parts list and match the exact reference number and part number. If your unit is a different series/revision, Graco may specify another control-shaft number for that build.

Always follow the number shown in your exact model/revision manual. Some series use different shafts across years. If in doubt, verify by serial number before ordering.

Inconsistent pressure control, difficulty adjusting, or mechanical play within the control module. Inspect the shaft and mating components for wear before reassembly.

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