The Multiquip 509434780 Release Collar 62X78X40 is a genuine OEM component designed for MRH800DS2, MRH-800DS, and MRH800GS walk-behind rollers. Sourced directly from Multiquip, this collar meets the exact dimensional and material specifications of the original part, ensuring a drop-in fit with no guesswork. It is the correct service replacement when the existing collar shows wear, deformation, or engagement issues that affect clutch or drive function. Confirm your model code before ordering to ensure full compatibility with your machine.
Key Features
- Dimensional Accuracy for Collar-Dependent Engagement — Manufactured to the precise 62x78x40 mm specification, maintaining correct seating and engagement geometry in the drivetrain assembly.
- Genuine OEM Part — Produced to Multiquip's original design tolerances, so the collar interfaces correctly with mating components without modification.
- Direct Fitment for MRH800 Series Walk-Behind Rollers — Confirmed for MRH800DS2, MRH-800DS, and MRH800GS models; check your model code to verify compatibility.
- Restores Proper Release Action — A worn or damaged release collar can cause inconsistent engagement or binding in the drive system; replacing it restores smooth, predictable operation.
- Correct Part Number for Service Records — Using OEM part 509434780 keeps your maintenance documentation accurate and parts traceability intact.
A release collar is a precision ring component used in clutch and drive engagement systems. It acts as the interface that transfers axial force to engage or disengage a clutch mechanism, allowing the operator to control drive power to the roller drum. When a release collar wears down or cracks, it can cause slipping, incomplete engagement, or a complete loss of drive function — all of which compromise compaction output and operator control. Replacing it promptly with a correctly sized collar restores the mechanical linkage the drive system depends on.
Part Details
| Part Number | 509434780 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Release Collar 62X78X40 |
Compatibility & Fitment
| Name | Model |
|---|---|
| Rollers | MRH800DS2 |
| Rollers | MRH-800DS |
| Rollers | MRH800GS |
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.
