The Multiquip 1042653 Upper Ball Bearing 6306ZZC3 is a genuine OEM component designed for the ST6125D and ST4125D clean water submersible pumps. Sourced directly from Multiquip, this bearing meets the original engineering specifications for these units, ensuring a correct, drop-in fit with no guesswork. Confirmed fitment covers ST6125D and ST4125D models, making it straightforward to source the right part the first time.
Key Features
- Genuine OEM Bearing Grade — manufactured to the exact radial clearance and load-rating specification required by Multiquip submersible pump designs, not a generic substitute.
- Double-Shielded C3 Clearance — the ZZC3 designation means both shields are in place to block contaminants, with C3 internal clearance engineered for the heat and load conditions inside a running submersible pump motor.
- Direct Upper-Position Replacement — sized and profiled specifically for the upper bearing seat in the ST6125D and ST4125D motor housings, so installation is straightforward using standard bearing press tooling.
- Confirmed Fitment — verified for ST6125D and ST4125D Multiquip clean water submersible pumps; cross-reference part number 1042653 against your serial plate before ordering.
- Protects Motor Shaft Alignment — a worn or failed upper bearing allows shaft deflection that accelerates seal wear, increases vibration, and can lead to motor failure; replacing at the correct service interval restores smooth, stable rotation.
The upper ball bearing supports the top of the pump motor's rotor shaft, keeping it centered and absorbing the radial loads generated during operation. When this bearing is in good condition, the shaft spins true, mechanical seals stay properly seated, and the motor runs efficiently. As the bearing wears, increased play in the shaft puts stress on surrounding seals and windings — left unaddressed, this can result in water ingress into the motor or complete shaft seizure, turning a low-cost bearing replacement into a full motor rebuild.
Part Details
| Part Number | 1042653 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Upper Ball Bearing 6306ZZC3 |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Submersible Pumps Clean Water | ST6125D |
| MQ Submersible Pumps Clean Water | ST4125D |
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.
