Graco 158359 Air Valve Actuator
$237.50
In Stock
The Graco 158359 Air Valve Actuator is a genuine OEM part designed for the air motor of Graco Fire-Ball 425 pumps, ensuring smooth and reliable pneumatic operation.
- OEM Replacement – Fits Fire-Ball 425 Series 75:1 pumps
- Ensures smooth air flow in the motor section
- Durable construction for long service life
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
Easy Returns
Graco 158359 Air Valve Actuator Overview
The Graco 158359 Air Valve Actuator is a genuine OEM replacement part designed for the air motor section of Graco pneumatic pumps. It regulates the flow of compressed air that drives the pump piston, ensuring efficient and reliable operation of your pump system.
Compatible Machines
This actuator fits specific Graco Fire-Ball 425 Series 75:1 air-powered grease pumps models:
- 239729 – Fire-Ball 425, 120-lb (55 kg) drum version
- 239730 – Fire-Ball 425, 400-lb (180 kg) drum version
- 239731 – Fire-Ball 425, Stubby version
Key Features
- OEM Quality: Manufactured by Graco for precise fit and reliable performance.
- Critical Function: Controls air transfer in the motor for smooth cycling of the pump piston.
- Durable Construction: Built for long service life under demanding industrial use.
- Easy Replacement: Direct fit for the listed Fire-Ball 425 Series pumps.
Technical Details
| Specification | Details |
|---|---|
| Part Number | 158359 |
| Part Type | Air Valve Actuator Assembly |
| Used In | Air Motor Section of Fire-Ball 425 Pumps |
| Manufacturer | Graco Inc. |
| Material | Precision-Machined Metal Components |
Installation & Tips
- Always verify your pump model and serial number before ordering.
- Ensure the air supply is clean, dry, and regulated to avoid actuator damage.
- Use only genuine Graco parts for safety and performance assurance.
- Check related seals and grommets if the air motor shows erratic operation.
Frequently Asked Questions
It controls air flow inside the air motor, allowing the pump piston to cycle correctly during operation.
Check your pump’s model and series number (e.g., 239729 Series B) and confirm it matches one of the compatible Fire-Ball 425 Series pumps listed above.
Replace it when the air motor fails to start, stalls, or operates inconsistently — often indicating actuator wear or internal air leaks.
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