The Multiquip 100KDO7552 Ball Bearing Upper ST-4125 is a genuine OEM ball bearing designed for the ST-4125 swing tube concrete pump. This is a direct OEM replacement sourced through Multiquip's authorized parts program, ensuring the component meets the original design specifications for the ST-4125. Correct fitment is confirmed for ST-4125 series concrete pumps, making this the straightforward choice when servicing the upper bearing position on this machine.
Key Features
- OEM-Grade Bearing Tolerances — Manufactured to the same precision tolerancing as the original, maintaining proper shaft alignment and load distribution in the upper bearing position.
- Direct Upper-Position Fit — Engineered specifically for the upper bearing location on the ST-4125, dropping into the existing housing without modification to the bore or retaining hardware.
- Confirmed ST-4125 Compatibility — Verified fitment for the Multiquip ST-4125 swing tube concrete pump, so you can order with confidence.
- Supports Smooth Pump Operation — A correctly seated upper bearing keeps the pumping mechanism running true; a worn bearing introduces vibration, accelerated wear to surrounding components, and eventual pump failure.
- Genuine OEM Part — Supplied as an authentic Multiquip component, carrying the same part number 100KDO7552 used in Multiquip's official parts documentation.
The upper ball bearing in a swing tube concrete pump supports the rotating shaft at its top end, absorbing both radial and axial loads generated during pumping cycles. It keeps the shaft centered and stable, which is critical to maintaining consistent material flow and preventing premature wear on the seals and swing tube assembly around it. When this bearing begins to fail, operators typically notice increased vibration, unusual noise from the upper pump housing, or irregular pumping rhythm — all signs that the bearing needs immediate replacement to avoid more extensive damage to the pump.
Part Details
| Part Number | 100KDO7552 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Ball Bearing Upper 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.
