The Multiquip 21810 Oil Seal is a genuine OEM component designed for Whiteman ride-on power trowels and MQD series diaphragm pumps, including the HHN31V, HHXD5, HHXG5, HHXD5-ES, HHN34TVD, EHHNK5, HHXDF4-DF5, HHNG5, MQD2H, and MQD3H. Sourced directly from Multiquip, this seal meets the exact material and dimensional specifications of the original part. It installs as a direct replacement with no adaptation needed, making it a straightforward fix whether you are servicing a trowel gearbox or a diaphragm pump housing. DHS Equipment stocks genuine Multiquip parts so you can verify fitment by part number and get the right component the first time.
Key Features
- Genuine OEM Sealing Integrity — manufactured to Multiquip's original lip profile and material grade, ensuring consistent fluid containment under operating pressure and rotational load.
- Direct-Fit Replacement — matches the original bore diameter and shaft tolerance of the HHN, HHXD, HHXG, and MQD series, so it seats correctly without machining or shimming.
- Broad Fitment Coverage — compatible with HHN31V, HHXD5, HHXG5, HHXD5-ES, HHN34TVD, EHHNK5, HHXDF4-DF5, HHNG5, MQD2H, and MQD3H equipment.
- Protects Critical Internal Components — a correctly seated oil seal prevents lubricant loss and keeps contaminants out of gearboxes and pump housings, extending the service life of bearings and rotating assemblies.
- Verified Part Number — ordering by Multiquip part number 21810 confirms you are receiving the exact seal specified for these machines, not a generic substitute.
An oil seal creates a dynamic barrier between a rotating shaft and its housing, retaining lubrication on the inside while blocking dirt, water, and debris from entering. In ride-on power trowels, these seals are critical to gearbox health — a worn or failed seal allows gear oil to leak out and contamination to work in, leading to accelerated wear on internal gears and bearings. In diaphragm pump applications, a compromised seal can disrupt fluid pathways and reduce pumping efficiency. Replacing a deteriorating seal promptly with a correctly specified part like the Multiquip 21810 keeps the assembly running as intended and prevents more costly repairs down the line.
Part Details
| Part Number | 21810 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Oil Seal |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HHN31V |
| Whiteman Ride-On Power Trowels | HHXD5 |
| Whiteman Ride-On Power Trowels | HHXG5 |
| Whiteman Ride-On Power Trowels | HHXD5-ES |
| Whiteman Ride-On Power Trowels | HHN34TVD |
| International Ride-On Power Trowels | EHHNK5 |
| Whiteman Ride-On Power Trowels | HHXDF4-DF5 |
| Whiteman Ride-On Power Trowels | HHNG5 |
| Diaphragm Pumps | MQD2H |
| Diaphragm Pumps | MQD3H |
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.
