Aqualon 11669 – Plunger Assembly – Replaces OMAX 304399 / 303160
Aqualon Part Number: 11669
Replaces OMAX Part Number(s): 304399 / 303160
Other References: None verified
Stock Status: In stock (Europe) – Estimated 2 week lead time. Ships from Melbourne, Australia.
Overview
The Aqualon 11669 – Plunger Assembly – Replaces OMAX 304399 / 303160 is the complete reciprocating plunger used in legacy OMAX and MAXIEM direct-drive pump wet ends. It provides the driven interface between the crankshaft and the high-pressure sealing system, supplying the displacement required to generate cutting pressure.
Purpose / Why It Matters
The plunger must maintain precise surface finish and alignment to ensure dynamic seals perform correctly. Wear, scoring, or impact damage can shorten seal life, reduce pressure stability, and accelerate cylinder wear. Replacing the plunger assembly restores proper sealing conditions, consistent volumetric output, and smooth pump operation.
Compatibility
This assembly replaces OMAX 304399 and 303160 and is compatible with all legacy OMAX direct-drive and MAXIEM pumps that specify these OEM numbers.
No EnduroMAX compatibility is implied.
When to Replace / Service Indicators
Replace the plunger assembly when:
• Scoring or pitting is visible on the plunger surface
• Seals fail prematurely despite correct installation
• Pressure becomes inconsistent under load
• Cylinder or seal wear patterns indicate plunger misalignment
• The pump is undergoing a major wet-end rebuild cycle
Common Uses
• Full wet-end rebuilds requiring new plungers
• Restoring performance on pumps with wear-related pressure fluctuations
• Replacing damaged plungers following seal failure or contamination events
• Bringing older machines back to stable, predictable output
Why Choose Aqualon
The Aqualon 11669 matches the verified geometry and performance requirements of OMAX 304399 and 303160, ensuring correct interaction with dynamic seals, proper fit in the cylinder assembly, and reliable pressure generation in legacy OMAX and MAXIEM direct-drive pumps.
