The Multiquip 02041023401 is a genuine OEM O Ring DNO ST-4100 6150 designed for the ST-4100 swing tube concrete pump. As a factory-sourced replacement, this O ring is manufactured to the exact material composition and dimensional tolerances required by Multiquip for the ST-4100 platform. Sourcing the correct seal for concrete pump service is critical — an improperly fitted or worn O ring can lead to pressure loss, material bypass, and costly pump downtime. Confirm your model and part number before ordering to ensure a direct, trouble-free installation.
Key Features
- Genuine OEM Sealing Material — Factory-sourced elastomer compound engineered to maintain compression and chemical resistance under the hydraulic and pumping pressures specific to concrete pump applications.
- Direct-Fit Replacement — Dimensioned to drop into the original seal groove on the ST-4100 without reworking mating surfaces or hardware.
- Confirmed ST-4100 Fitment — Verified for the Multiquip ST-4100 swing tube concrete pump series; cross-reference part number 02041023401 against your service documentation before installation.
- Maintains Pump Pressure Integrity — A correctly seated O ring prevents concrete slurry and hydraulic fluid from bypassing the seal interface, keeping output pressure consistent through each pumping cycle.
- Fuel and Fluid Compatibility — OEM-grade rubber formulation resists degradation from hydraulic fluid and the alkaline environment created by concrete and cement slurry contact.
An O ring in a concrete pump serves as the primary sealing element at critical junctions within the pumping circuit — including valve bodies, cylinder interfaces, and hydraulic connections. When this seal is intact, it maintains the pressure differential needed to move concrete through the delivery line efficiently. As the O ring wears, cracks, or deforms, pressure bleeds past the seal face, reducing pump output, causing material leakage, and accelerating wear on surrounding components. Replacing a degraded O ring promptly with the correct OEM part restores the sealed circuit and protects the broader pump assembly from progressive damage.
Part Details
| Part Number | 02041023401 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring DNO ST-4100 6150 |
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.
