The Multiquip 383911 Inner Bearing Cup 2 In. is a genuine OEM component designed for Mayco hydraulic-driven concrete pump models including the LS300, LS400, LS40D, LS40TD, LS500, LS50TD, LS600, and LS60TD. As a direct OEM replacement, this bearing cup is manufactured to the same specifications as the original, ensuring proper seating and load distribution within the pump's drive assembly. Verifying your model code before ordering is always recommended — the 383911 is the correct cup for the LS-series Mayco concrete pumps listed above.
Key Features
- OEM-Grade Bearing Surface: — Manufactured to the same hardness and dimensional tolerancing as the original cup, ensuring consistent taper contact with the bearing cone under load.
- Drop-In Replacement: — Matches the original 2-inch bore seating geometry of the LS-series drive assembly, so installation follows the standard bearing cup press procedure without rework.
- Broad LS-Series Fitment: — Confirmed fit across eight Mayco hydraulic concrete pump models: LS300, LS400, LS40D, LS40TD, LS500, LS50TD, LS600, and LS60TD.
- Sustained Load Capacity: — A properly seated bearing cup keeps the cone aligned under the radial and axial loads generated during high-pressure concrete pumping, preventing premature bearing failure and shaft damage.
- Genuine Multiquip OEM Part: — Sourced directly through the Multiquip OEM supply chain under part number 383911, so you can be confident you are installing the correct component.
A bearing cup — also called a bearing race — is the outer ring of a tapered roller bearing assembly. It provides the precision-machined surface that the bearing cone and rollers ride against, transferring rotational load from the shaft to the housing while maintaining correct alignment. In a high-cycle concrete pump like the LS-series Mayco units, a worn or damaged bearing cup causes uneven roller contact, which leads to accelerated bearing wear, increased heat, vibration, and ultimately shaft or housing damage if left unaddressed. Replacing the cup with a correctly dimensioned OEM part restores the bearing assembly to its original load-handling capacity and protects the surrounding drivetrain components.
Need help confirming fitment or locating additional LS-series parts? Contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | 383911 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Inner Bearing Cup 2 In. |
Compatibility & Fitment
| Name | Model |
|---|---|
| Mayco Pumps | LS400 |
| Mayco Pumps | LS500 |
| Mayco Pumps | LS600 |
| Mayco Pumps | LS60TD |
| Mayco Pumps | LS40D |
| Mayco Pumps | LS40TD |
| Mayco Pumps | LS50TD |
| Mayco Pumps | LS300 |
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.
