The Multiquip 100KDO7559 Ball Bearing Lower ST-4125 is a genuine OEM lower ball bearing designed for the Multiquip ST-4125 swing tube concrete pump. As a direct OEM replacement, 100KDO7559 is manufactured to the same tolerances and load ratings as the original component, ensuring a correct, secure fit in the lower bearing position without any guesswork. This bearing is a critical wear item in the ST-4125 pump drive assembly, and keeping it in good condition is essential to maintaining smooth, consistent concrete pumping output on the jobsite.
Key Features
- OEM-Grade Bearing Tolerances — Manufactured to the same radial clearance and load rating specifications as the original, preventing the vibration and heat buildup that result from imprecise bearing fit.
- Drop-In Lower Bearing Replacement — Engineered to seat correctly in the lower bearing position of the ST-4125 drive assembly, aligning with the original shaft and housing dimensions.
- Confirmed Fitment for ST-4125 — Verified for direct use in the Multiquip ST-4125 swing tube concrete pump, so you can order with confidence.
- Sustained Drive Efficiency — A properly functioning lower bearing keeps the drive shaft rotating smoothly under load, maintaining consistent pumping pressure and output volume throughout the pour.
- Prevents Progressive Drive Damage — A worn or failed lower bearing introduces shaft wobble and excess heat that can accelerate wear on adjacent drive components; timely replacement with the correct OEM part protects the broader assembly.
The lower ball bearing in the ST-4125 concrete pump supports the drive shaft at its base, absorbing both radial and axial loads generated during pumping operation. It allows the shaft to rotate freely and accurately within the housing, which is essential for maintaining consistent concrete output pressure and protecting the pump's internal drive components. When this bearing wears or fails, operators typically notice increased vibration, abnormal noise from the drive assembly, and eventually a loss of pumping performance — making it a key scheduled maintenance item on any ST-4125 in regular service.
For questions about fitment or to confirm this is the correct part for your machine, contact the DHS Equipment parts team before ordering.
Part Details
| Part Number | 100KDO7559 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Ball Bearing Lower 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.
