The Multiquip 100KDO75204 O Ring Pump Housing ST-4125 is a genuine OEM seal component designed for the ST-4125 concrete pump. As a direct OEM replacement, this o ring is manufactured to the exact material grade and dimensional tolerances required for a proper compression seal within the pump housing. Sourced directly through Multiquip's authorized parts network, 100KDO75204 ensures you're installing the correct component for your ST-4125. DHS Equipment stocks this part to keep your concrete pump back in service without delay.
Key Features
- Correct Compression Seal Geometry — Manufactured to the exact cross-section diameter and durometer rating needed to achieve a proper housing seal on the ST-4125 concrete pump.
- Genuine OEM Material Grade — Made from the same compound specified by Multiquip for the original pump housing assembly, resisting the pressure and fluid exposure typical in concrete pump operation.
- Direct ST-4125 Fitment — Engineered specifically for the ST-4125 swing-tube concrete pump; seats into the pump housing without modification or adaptation to the bore.
- Prevents Pressure Loss and Leakage — A worn or degraded o ring allows hydraulic fluid or slurry to bypass the housing seal, causing pressure drop and inconsistent pump output; this replacement restores the integrity of that seal.
- Authorized Multiquip OEM Part — Sold by DHS Equipment as a verified genuine OEM component under part number 100KDO75204, giving you confidence that this part matches the original specification.
An o ring in the pump housing of a concrete pump serves as the primary pressure seal between mating housing surfaces, preventing fluid or material from escaping the pump circuit. When this seal degrades — through compression set, chemical exposure, or mechanical wear — the pump loses pressure integrity, leading to leaks, output inconsistency, and potential damage to surrounding components. Replacing the o ring with the correct OEM-spec part restores the housing seal and allows the ST-4125 to operate at its intended output pressure and efficiency.
For questions about part 100KDO75204 or compatibility with your ST-4125, contact the DHS Equipment parts team directly.
Part Details
| Part Number | 100KDO75204 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring Pump Housing ST-4125 |
Compatibility & Fitment
| Name | Model |
|---|---|
| ST-4125 | ST-4125 |
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.
