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Graco 100104 Pin

Graco 100104 Pin is a durable cotter pin used to secure key components in Graco pumps and stripers. It ensures safe locking and prevents fasteners from loosening during operation.

  • Part Type: Cotter Pin
  • Size: 1/8″ × 1.75″
  • Fits: LineLazer IV 250SPS, 250DC, Bulldog & King Pumps
  • Prevents mechanical loosening and enhances reliability

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Overview & Compatibility — Graco 100104 Pin (Cotter)

Compatible Machines

This cotter pin is listed in official Graco parts manuals for the following equipment:

  • LineLazer IV 250SPS self-propelled line striper (parts list item: 100104 PIN, cotter).
  • LineLazer IV 250DC self-propelled line striper (parts list item: 100104 PIN, cotter).
  • Bulldog & King drum-length pump assemblies (selected builds; spec calls out 0.125″ dia. × 1.75″ long).

Key Details

Graco Part # 100104
Common Name Pin (Cotter)
Dimensions (per manuals) Ø 0.125″ (3.2 mm) × 1.75″ (45 mm) long
Typical Use Mechanical retention/locking for shafts, linkages, wheels, or assemblies (prevents fasteners from backing out).
Where It Appears Parts diagrams for LineLazer IV 250/250SPS/250DC and selected Bulldog/King pump assemblies.

Frequently Asked Questions

It matches the 1/8″ (3.2 mm) diameter and 1.75″ length specified in Graco manuals. While many generic pins share those dimensions, use the OEM part when exact fit/retention and compliance are required.

Official parts manuals for the LineLazer IV 250SPS and LineLazer IV 250DC show item “100104 PIN, cotter”. Always cross-check your exact model code/series and serial range.

Yes—certain Bulldog/King drum-length pump assemblies list 100104 with the 0.125″ × 1.75″ spec. Check the serial-specific parts list for your exact build to confirm.

Insert the straight leg through the pre-drilled hole, then bend/separate the ends to lock. Replace bent or fatigued pins during service; do not reuse a damaged cotter pin.

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