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Graco 100063 Pin Cotter

The Graco 100063 Pin, Cotter is a genuine OEM retaining fastener designed to lock stop pins and linkages securely in place across various Graco pumps and sprayers. Durable and reliable for high-pressure applications.

  • Part Type: Cotter Pin
  • Size: 1/16" diameter × 1/2"–1" length
  • Used In: Graco President, Fast-Flo, Hydra-Clean & Displacement Pump models
  • Purpose: Prevents pin or linkage movement during operation
  • Material: Steel (OEM grade)

$8.86
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Overview & Key Details

Compatible Machines

The Graco 100063 Pin, Cotter is a small retaining fastener that appears across multiple Graco pumps and spray systems. Verified examples include:

  • President Pump 15:1 series (displacement pump assemblies list 100063)
  • President Pump 30:1 series (ball stop/coupling areas secured with cotter pins including 100063)
  • Fast-Flo Air-Powered Low Viscosity Pumps — Models 220439 / 220440 (ball stop pin retained by cotter pin)
  • Stainless Steel Industrial Pumps (piston/ball stop pin retained with cotter pin; parts tables list 100063)
  • Hydra-Clean Stainless Steel Pumps (air motor / displacement interface uses a cotter pin in service steps)
  • Displacement Pump Assemblies for various air-powered Graco units (stop pin retained by cotter pin)
  • 5-Gallon Duo Paint Sprayer (service instructions reference a cotter pin at displacement rod connection)

What is Graco 100063 Pin, Cotter?

A genuine Graco retaining fastener used to lock a stop pin or linkage so parts cannot back out during operation. It’s commonly installed through a cross-drilled hole and then bent to secure.

Key Specifications

Attribute Detail
Part Number 100063
Type Pin, Cotter (retaining fastener)
Common Size References 1/16" (≈1.5 mm) diameter; 1/2"–1" (≈13–25 mm) length noted across manuals
Typical Location Secures ball stop pins, linkage pins, or displacement rod connections
Genuine/OEM Genuine Graco service part

Installation & Service Tips

  • Insert fully through the cross-hole and bend the legs to prevent backing out.
  • Replace if bent, corroded, or after any major teardown where retention may be weakened.
  • Match the diameter and length specified in your model’s parts list; using oversized/undersized pins may cause failure.

Frequently Asked Questions

It’s used across many Graco pumps and systems. Check your unit’s parts manual for “100063” in the parts list or diagrams. If your manual lists a cotter pin with this number, it’s the correct part for that location.

Graco manuals commonly reference 1/16" diameter with lengths around 1/2" to 1" depending on the assembly. Always follow the size shown in your model’s bill of materials.

Use OEM where possible. If substituting, the pin must match the specified diameter and length, and be suitable for the environment (e.g., stainless for corrosive washdown). Incorrect substitutions risk loosening or damage.

Often at the ball stop pin, displacement rod connection, or linkages in the pump lower. Your model diagram will show the exact reference number tied to 100063.

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