Multiquip EM903163 Bearing Cup

The Multiquip EM903163 Bearing Cup is a genuine OEM component designed for C30HD, C30HDNI, C30HDG, C30HDZ, C30HDGA, and C30HDN series Mayco concrete pumps. As a direct OEM replacement, the EM903163 is manufactured to the same specifications as the original part, ensuring a correct, trouble-free installation. Sourced directly through authorized Multiquip distribution channels, this bearing cup is the right choice when you need confidence in fitment and longevity on your concrete pump.

Key Features

• Precision-Matched OEM Tolerancing — Manufactured to exact dimensional specs so the cup seats correctly against the bearing cone, maintaining proper load distribution and race alignment.
• Drop-In Replacement — Engineered to install directly into the original bearing housing on C30HD-series concrete pumps without machining or modification to the bore.
• Broad C30 Series Compatibility — Confirmed fitment across C30HD, C30HDNI, C30HDN, C30HDG, C30HDZ, and C30HDGA Mayco pump models.
• Protects Drive Train Integrity — A correctly fitted bearing cup keeps rotating components running true under the cyclic loads of concrete pumping; a worn or damaged cup accelerates bearing failure and risks shaft damage.
• Genuine OEM Part — Supplied as an authentic Multiquip replacement, backed by the OEM parts program for traceability and quality assurance.

A bearing cup — also called a bearing race — is the outer ring of a tapered roller bearing assembly. It provides the hardened, precision-ground surface against which the bearing rollers travel, and it works together with the bearing cone to handle both radial and axial loads generated by rotating shafts. In a concrete pump like the C30HD series, these bearings support the drive and output shafts through constant loading and vibration; if the cup becomes worn, pitted, or spalled, the bearing loses its ability to carry load evenly, leading to increased heat, accelerated wear across the entire bearing set, and eventual shaft or housing damage. Replacing a worn bearing cup with a correct OEM-specification part restores proper load capacity and extends the service life of surrounding drivetrain components.

Part Details

Compatibility & Fitment

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.