Graco 100103 Pin Cotter
5/5
(1 review)
$7.30
In Stock
Graco 100103 Pin, Cotter is a genuine replacement fastener designed to secure rods, pistons, or linkage parts within Graco pump assemblies. Built for reliability and perfect OEM fit.
- Part No: 100103 (1/8" × 1-1/2")
- Used in: Senator, GH 733, Viscount II 4500, and President pump systems
- Material: Durable steel construction
- Ensures secure retention of moving components
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Overview: Graco 100103 – Pin, Cotter (1/8" × 1-1/2")
Compatible Machines / Assemblies
This cotter pin is used across multiple Graco pumps and connection kits that specify a 1/8" × 1-1/2" cotter pin.
- Graco 13:1 Senator pump systems (assemblies calling out 100103 in parts list)
- Graco GH 733 (gas hydraulic) systems where the lower/drive linkage specifies 100103
- Graco Viscount II 4500 hydraulic systems (select 4-ball lower linkages)
- Graco President air motor + 4-ball lower assemblies (per applicable parts manuals)
- Graco 4-Ball Lower Retrofit Connection Kits (e.g., kit families that list 100103 “Pin, Cotter”)
- Other Graco displacement pumps that explicitly specify a 1/8" × 1-1/2" cotter pin in the bill of materials
Key Specifications
| Part Number | 100103 (also written 100-103) |
|---|---|
| Item | Pin, Cotter (retaining/locking pin) |
| Typical Size | 1/8" diameter × 1-1/2" length (per common Graco parts lists) |
| Function | Secures rods, linkages, locknuts or piston hardware within pump/connection assemblies |
| Material/Finish | Steel (finish may vary by production lot) |
Why Choose the Graco 100103 Cotter Pin
- Correct spec for assemblies calling out 1/8" × 1-1/2"
- Reliable retention of drive rods, pistons and linkage components
- Genuine-fit sizing commonly used across Graco pump families
- Low-cost safeguard against vibration-related loosening
How to Confirm Fit
- Identify your exact sprayer/pump model and series.
- Open the OEM parts list (BOM) for your model.
- Locate the linkage/rod/piston call-outs and verify the cotter pin size/part # is 100103 (1/8" × 1-1/2").
- If a different size/part # is listed, use the exact specified pin for that assembly.
Frequently Asked Questions
Common Graco parts lists show 1/8" diameter × 1-1/2" length. Verify this against your model’s BOM before ordering.
Frequently seen on Senator, GH 733, Viscount II 4500, and certain President + 4-ball lower assemblies, as well as select 4-Ball Lower Retrofit Connection Kits. Always confirm via the parts list for your exact model/series.
Replace if bent out of shape, corroded, fatigued, or if legs no longer hold securely after service. Always use the OEM-specified size to maintain retention strength.
Insert through the pre-drilled hole fully, then spread the legs evenly to lock the assembly. Do not over-bend; avoid reusing old cotter pins after disassembly.
No. Many Graco assemblies use 100103, but others may call for different lengths/diameters. Use your machine’s parts manual to confirm the exact pin required.
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Susan J.
Bought this after the original wore out, and for the 100103 Pin Cotter (Part #100103) and installation took less than ten minutes. Will be ordering more parts from here.
