Graco 101274 Pin Cotter
$7.20
In Stock
Genuine Graco 101274 Pin, Cotter – small but vital for securing the displacement rod and piston ball stop in many Graco pumps. Ensures proper alignment and reliable operation during high-pressure use.
- Part No.: 101274 (also listed as 101-274)
- Size: 0.12" dia × 0.50" long
- Material: Steel
- Used In: Graco pumps with older-style displacement rod assemblies
- Purpose: Locks piston ball stop to the displacement rod securely
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Genuine OEM Part
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Graco 101274 – Pin, Cotter (Genuine OEM)
Compatible Machines
- Graco displacement pumps that use the older-style displacement rod & piston ball stop assembly.
- Equipment listing 101274 (or 101-274) in the service/parts manual bill of materials.
- Pumps specifying a 0.12" (≈3.2 mm) × 0.50" (≈13 mm) cotter pin at the rod/ball-stop location.
- Commonly found across select airless paint sprayers and fluid-handling pumps that reference this pin in their exploded views.
What is the Graco 101274 Pin, Cotter?
A genuine cotter pin used to secure critical internal components—typically the piston ball stop to the displacement rod—inside compatible Graco pumps. Using OEM hardware preserves fit, tolerance, and long-term reliability under high-pressure operation.
Key Features
- OEM dimensions for proper retention in Graco pump assemblies.
- Steel construction for durability in high-cycle environments.
- Small but critical: prevents displacement-rod components from backing out.
Specifications
| Graco Part No. | 101274 (also shown as 101-274 in some manuals) |
|---|---|
| Description | Pin, Cotter |
| Diameter | ≈ 0.12" (≈ 3.2 mm) |
| Length | ≈ 0.50" (≈ 13 mm) |
| Material | Steel |
| Typical Location | Displacement rod & piston ball-stop retention point (older-style assemblies) |
Fitment Notes
- Always verify by manual: look for 101274 / 101-274 in your sprayer’s parts list or exploded diagram.
- If your pump calls for a 0.12" × 0.50" cotter pin at the ball-stop location, this is the correct OEM piece.
- Replace if bent, corroded, fatigued, or removed during pump overhaul.
Installation Tips (General)
- Depressurize and follow all lock-out/tag-out and safety guidance in the machine manual.
- Confirm orientation and fully seat the pin through the rod/ball-stop holes.
- Spread the legs of the cotter pin evenly to lock components in place without deforming adjoining parts.
- After reassembly, perform a leak and function check at low pressure before returning to service.
Frequently Asked Questions
Check your unit’s service/parts manual. If it lists 101274 (101-274) for the displacement-rod/piston ball-stop location, this is the correct pin. Match the specified 0.12" × 0.50" dimensions as a secondary check.
A same-size generic pin may physically fit, but genuine Graco hardware ensures correct tolerance, finish, and durability for high-pressure assemblies. OEM is recommended for safety and longevity.
Replace it during major pump service (e.g., rod/piston or ball-stop work) or if you see bending, corrosion, or fatigue. It’s inexpensive insurance against component loosening.
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