The Multiquip 100KDO75604 O Ring Bearing Housing ST-4125 is a genuine OEM seal designed for the ST-4125 swing tube concrete pump. As a direct OEM replacement, this o-ring is manufactured to the exact material grade and dimensional tolerances required by the ST-4125, ensuring a proper compression fit within the bearing housing. Sourced directly through Multiquip's authorized parts network, 100KDO75604 is the correct specification seal to maintain the integrity of your pump's bearing housing assembly.
Key Features
- OEM-Grade Seal Material — Manufactured to the precise compound and durometer specification required for the ST-4125 bearing housing, maintaining proper compression and sealing force over extended service cycles.
- Drop-In Housing Fit — Seats directly into the bearing housing groove on the ST-4125 with no reworking of surrounding components, matching the original installation profile exactly.
- ST-4125 Compatibility — Confirmed fitment for the Multiquip ST-4125 swing tube concrete pump; verify your model code before ordering to ensure the correct seal selection.
- Leak Prevention at the Bearing Housing — A correctly seated o-ring keeps lubricant contained within the bearing housing and prevents contaminants from entering, protecting the bearing from accelerated wear and premature failure.
- Genuine OEM Part — Supplied as an authentic Multiquip component, meaning the part number, material specification, and geometry match the original build standard for the ST-4125.
The bearing housing o-ring forms a critical fluid and contamination seal between the bearing housing and adjoining components in the ST-4125 concrete pump's drive assembly. It prevents lubricant from escaping the housing while also blocking slurry, water, and abrasive particles from reaching the bearing surfaces. When this o-ring degrades, becomes brittle, or loses its compression set, lubricant leaks and contamination ingress can cause rapid bearing wear, increased operating temperatures, and eventual housing damage — making timely o-ring replacement one of the most cost-effective preventive maintenance steps on the ST-4125.
Need help confirming fitment or looking up additional ST-4125 parts? Contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | 100KDO75604 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O Ring Bearing 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.
