Graco 15A042 Piston Shaft – OEM Replacement Part Overview
The Graco 15A042 Piston Shaft is a genuine OEM component designed for reliable performance inside Graco pump assemblies. It ensures smooth piston and diaphragm movement, restoring optimal operation in compatible Graco industrial pumps.
Compatible Machines
This OEM part fits the following Graco pump model(s):
- Graco Triton 1030HP Diaphragm Pump
Key Features
- Genuine Graco OEM replacement shaft.
- Designed for high-pressure, industrial pump operation.
- Provides correct alignment and motion for the piston assembly.
- Durable construction for long service life in demanding applications.
Technical Specifications
| Specification | Details |
| Part Number | 15A042 |
| Part Type | Shaft, Piston |
| Brand | Graco |
| Used In | Internal pump piston/diaphragm assembly |
| Material | High-grade metal alloy (OEM standard) |
When to Replace the Piston Shaft
- Reduced pump output or pressure inconsistencies.
- Noticeable wear or scoring on the shaft during service.
- Leaks or erratic diaphragm/piston movement.
- After internal pump rebuilds for long-term reliability.
Frequently Asked Questions
It connects and drives the piston/diaphragm mechanism within the pump, ensuring smooth operation and correct movement throughout the pump cycle.
Yes. The 15A042 is a genuine Graco OEM replacement part, ensuring correct fitment and performance.
Check your machine’s parts manual and confirm that the part number 15A042 is listed. If unsure, match your exact pump model—especially within the Triton 1030 series.
