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Graco 101831 Spring Str Pin

Graco 101831 Spring Straight Pin is a durable OEM part used in wiper and follower plate assemblies of Graco supply and ram systems. Designed to secure handles or stems in place, it ensures smooth operation and alignment of the wiper plate.

  • Part Number: 101831
  • Used In: Wiper/Follower Plate Assemblies
  • Fits: Supply Units 222812, 235516, 241081, 255648, 255664
  • Function: Provides secure pivot and alignment for the wiper handle

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Compatible Machines – Graco 101831 Spring Straight Pin

  • Wiper Plate (5-Gallon / 19 L) Assemblies – Models 222812, 235516 (listed as “PIN, spring, straight” in parts list)
  • Supply Systems (Platen Assemblies) – 30 gal Platen Model 255661 and 55 gal Platen Model 255664 (Ref #404: 101831)
  • Ram Supply Units – e.g., Model 918379 (3" Ram, 50:1 King/CM1000) and Model 918386 (3" Ram, 55:1 Bulldog/CM450), where the follower/wiper assembly includes 101831
  • Additional Graco Supply Units that use the same wiper/follower plate assemblies listing 101831 in their parts breakdowns

Product Overview

Graco 101831 is a Pin, Spring, Straight (SPR STR) used in wiper/follower plate assemblies of industrial Graco Supply Systems and Ram Supply Units. It secures the handle/probe stem and allows reliable, repeatable engagement of the wiper assembly during drum entry and operation.

Key Details

Attribute Value / Notes
Part Number 101831 (PIN, spring, straight)
Primary Assembly Wiper / Follower Plate kits for supply/ram systems
Typical Use Secures handle/probe stem in the wiper plate; maintains alignment
Material Hardened spring pin (steel), designed for interference fit
Where Found in Manuals Listed as Ref. 404 or item “PIN, spring, straight” in parts diagrams for wiper/platen assemblies

Why This Part Matters

  • Retention & Alignment: Keeps the handle/probe positioned for smooth wiper engagement.
  • Serviceability: Low-cost component that restores proper platen/wiper function when worn/bent pins cause play.
  • OEM Fit: Matches dimensions/tolerances specified in Graco parts lists.

Installation & Maintenance Tips

  • Inspect mating bores for burrs or ovality before installing the new spring pin.
  • Align holes precisely; use proper drivers—avoid mushrooming the pin ends.
  • Replace if the old pin shows bending, fretting, or looseness that can misalign the wiper handle/stem.

Frequently Asked Questions

Check the wiper/follower plate parts diagram for your unit. If the bill of materials lists “PIN, spring, straight – 101831”, it is the correct replacement.

No—101831 appears in industrial supply/ram systems wiper assemblies (drum platens, follower plates), not typical handheld or small contractor sprayers.

Excess play in the handle/probe, difficulty engaging the wiper, visible bending or wear marks, or a pin that won’t hold interference fit in the bore.

No. This is a spring pin (rolled/hollow). Install with proper alignment and support—adhesives are not used. Follow the torque/assembly notes in your unit’s manual.

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