The Multiquip 491056 O-Ring is a genuine OEM replacement designed for a wide range of Multiquip equipment including MG30T2D, MG30M2D, MG30T3D, MG30M3D fireproofing pump models, MG30 mixers, HHXG5 ride-on power trowels, V304, V305EK, and V305EH walk-behind rollers, and HTN-31VTCSL5 and HTO-31VTCSL5 mechanical ride-on trowels. As a direct OEM part, 491056 is manufactured to the same specification as the original component it replaces, ensuring a correct, consistent fit every time. DHS Equipment stocks this part ready to ship so you can get your equipment back in service without delay.
Key Features
- OEM-Grade Elastomer Construction — Manufactured to original material and durometer specifications, ensuring the correct compression set and sealing performance for this application.
- Drop-In Replacement — Matches the original groove dimensions and cross-section exactly, seating correctly without rework or adaptation to the housing.
- Broad Fitment Coverage — Compatible with MG30-series fireproofing pumps, MG30 mixers, HHXG5 trowels, V304/V305EK/V305EH rollers, and HTN-31VTCSL5/HTO-31VTCSL5 mechanical ride-on trowels.
- Maintains Fluid and Pressure Integrity — A correctly seated O-Ring prevents fluid bypass and pressure loss, keeping the system operating within its designed parameters.
- Fuel and Fluid System Safety — In fuel and hydraulic circuit applications, a failed or hardened O-Ring can cause leaks that create fire or contamination hazards; replacing with the correct OEM part restores the designed seal barrier.
An O-Ring is a circular elastomeric seal installed in a machined groove to prevent the passage of fluid or gas between mating surfaces or along a shaft. In equipment like pumps, mixers, and trowels, O-Rings appear throughout fuel systems, hydraulic circuits, and fluid passages where a low-cost seal performs a critical role in keeping pressurized or moving fluids contained. When an O-Ring ages, hardens, or becomes compressed beyond its elastic range, it loses the ability to conform to mating surfaces and leaks develop — leading to fluid loss, contamination, pressure drop, or in fuel system applications, a potential fire risk. Replacing a worn O-Ring with the correct OEM part restores the designed seal and prevents progressive damage to surrounding components.
Have questions about fitment or need help confirming the right part for your machine? Contact the DHS Equipment parts team for assistance.
Part Details
| Part Number | EM491056 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | O-Ring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Fireproofing Pumps | MG30T2D |
| Fireproofing Pumps | MG30M2D |
| Fireproofing Pumps | MG30T3D |
| Fireproofing Pumps | MG30M3D |
| Whiteman Ride-On Power Trowels | HHXG5 |
| Fireproofing Pumps | MG30 |
| Rollers | V305EK |
| Rollers | V304 |
| Rollers | V305EH |
| Mechanical Ride-On Trowels | HTN-31VTCSL5 |
| Mechanical Ride-On Trowels | HTO-31VTCSL5 |
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.
