The Multiquip EM18409 O-Ring is a genuine OEM sealing component designed for C30HD series concrete pumps, including the C30HD, C30HDNI, C30HDNI Zenith, C30HDNI Precision, C30HDGA, C30HDG, and C30HDZ models. As a direct OEM part, the EM18409 meets the original design tolerances required to maintain a proper fluid seal within the pump system. Sourced directly through authorized Multiquip supply channels, this O-Ring delivers the consistent dimensional accuracy that concrete pump sealing applications demand. Confirm your model code against the fitment list before ordering to ensure a correct match.
Key Features
- OEM-Grade Sealing Material — Manufactured to the original compression and material specification, ensuring the O-Ring seats and seals as intended within the pump assembly.
- Drop-In Replacement — Dimensionally identical to the original, allowing installation into the existing groove or port without reworking the seating surface.
- Broad C30HD Series Fitment — Compatible with C30HD, C30HDNI, C30HDNI Zenith, C30HDNI Precision, C30HDGA, C30HDG, and C30HDZ concrete pump models.
- Maintains Pump Output Integrity — A properly seated O-Ring prevents internal pressure loss and fluid bypass that can cause inconsistent concrete delivery or pump cavitation.
- Fluid System Safety — Worn or extruded O-Rings in a concrete pump circuit can allow hydraulic fluid or slurry leakage under pressure — replacing with the correct OEM part restores safe containment.
An O-Ring is a precision-molded loop seal used throughout concrete pump hydraulic and fluid circuits to prevent leakage at joints, ports, and fittings. When correctly installed, it forms a reliable barrier against pressure loss between mating components. As an O-Ring ages, it can harden, crack, or become compressed beyond its recovery range, allowing fluid to bypass the seal — resulting in pressure drops, external leaks, or contamination of adjacent systems. Replacing a degraded O-Ring promptly with the correct OEM part restores the tight seal the pump depends on for consistent, controlled concrete delivery.
Part Details
| Part Number | EM18409 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | C30HDNI Zenith |
| Mayco Pumps | C30HDN |
| Mayco Pumps | C30HDGA |
| Mayco Pumps | C30HDZ |
| Mayco Pumps | C30HDG |
| Mayco Pumps | C30HDNI Precision |
| Mayco Pumps | C30HDNI |
| Mayco Pumps | C30HD |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
