The Multiquip EM502551 is a genuine OEM Key 1/4 Square X 10 MM Long designed for Multiquip walk-behind vibratory roller models including the V304EH, V304ER, V304EY, V303E, V305EH, and V305EK. As a factory-sourced component, it meets the exact material and dimensional standards set by Multiquip for this application. Cut from bulk stock to the specified 10 MM length, this key ensures the correct shaft-to-hub engagement your roller depends on. DHS Equipment stocks genuine Multiquip parts so you can get the right component and get back to work.
Key Features
- Genuine OEM Material Grade — Cut from certified bulk stock to Multiquip's specified hardness and dimensional tolerances, ensuring proper load transfer between shaft and mating component.
- Exact 1/4 Square X 10 MM Specification — Matches the original keyway dimensions precisely, seating flush without shimming or filing for a clean, secure installation.
- Broad Walk-Behind Roller Fitment — Confirmed for V303E, V304EH, V304ER, V304EY, V305EH, and V305EK Multiquip vibratory rollers, covering both Honda and Robin/Subaru powered variants.
- Positive Drive Transmission — A correctly sized drive key locks the rotating assembly to the shaft, preventing slippage that can cause uneven compaction output or accelerated wear on mating surfaces.
- Direct OEM Replacement — Sourced directly from Multiquip, part number EM502551 installs in place of the original with no fitting adjustments needed.
A drive key is a small but critical component that sits in a machined slot — called a keyway — between a shaft and a hub or gear, locking the two together so they rotate as a single unit. On a walk-behind vibratory roller, the drive key transmits torque from the powertrain to the drum or drive assembly, meaning any wear, shearing, or incorrect sizing directly compromises the machine's ability to deliver consistent compactive force. When a key fails, the shaft spins independently inside the hub, causing drive loss and potential damage to the surrounding keyway surfaces — making prompt replacement with the correct OEM part essential.
Part Details
| Part Number | EM502551 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Key 1/4 Square X 10 MM Long |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | V304EH |
| Rollers | V304ER |
| Rollers | V304EY |
| Rollers | V303E |
| Rollers | V305EH |
| Rollers | V305EK |
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.
