The Multiquip 02041023402 is a genuine OEM O Ring DNO ST-4100 designed for the ST-4100 swing tube concrete pump. As a direct OEM replacement, this seal is manufactured to the original specification, ensuring proper compression and leak-free performance in the hydraulic or fluid circuit where it is installed. Sourced directly from Multiquip, this part is the correct choice for ST-4100 operators who need a dependable, exact-fit seal to restore their pump to full working condition.
Key Features
- OEM-Grade Seal Material — Manufactured to the original compound and durometer specification, delivering the compression and chemical resistance required for concrete pump service environments.
- Drop-In Replacement — Matches the original groove dimensions and cross-section of the ST-4100, seating correctly without modification to mating surfaces.
- Confirmed ST-4100 Fitment — Verified for use on the Multiquip ST-4100 swing tube concrete pump; always confirm your model before ordering.
- Leak Prevention — A failed or deformed O-ring allows fluid bypass that degrades pump output pressure and can lead to unplanned downtime; this replacement restores the sealed circuit to proper operating condition.
- Fluid System Integrity — Using the correct OEM seal prevents cross-contamination between fluid circuits, protecting downstream pump components from accelerated wear.
An O-ring is a circular elastomeric seal that sits in a machined groove between two mating surfaces, preventing fluid or air from escaping the joint under pressure. In a concrete pump like the ST-4100, O-rings are used throughout the hydraulic and material-transfer circuits to maintain pressure integrity and keep fluids routed correctly. When an O-ring degrades — through heat cycling, chemical exposure, or mechanical compression set — it loses its ability to seal, resulting in fluid leaks, pressure loss, and potential damage to surrounding components. Replacing a worn O-ring promptly with the correct OEM part restores the sealed system and protects the broader assembly.
Part Details
| Part Number | 02041023402 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring DNO ST-4100 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST-4100 | ST-4100 |
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.
