The Multiquip 825518 Injection Pump Assembly is a genuine OEM component designed for HHXD5 and HHXD5-ES Whiteman ride-on power trowels. As a direct-sourced OEM part, it meets the original design and performance specifications for the HHN-34TVD 34-D diesel engine configuration found in these machines. Sourced through DHS Equipment, this assembly provides a straightforward path to restoring proper fuel delivery and getting your trowel back to full operation.
Key Features
- Genuine OEM Fuel Delivery Precision — Built to the exact injection timing and output pressure specifications of the original HHN-34TVD 34-D engine, ensuring correct metered fuel delivery with every stroke.
- Direct-Fit Assembly — Engineered to connect directly to the existing fuel system and mounting points on HHXD5 and HHXD5-ES trowels without alteration.
- Confirmed Fitment — Verified for HHXD5 and HHXD5-ES Whiteman ride-on power trowels.
- Consistent Engine Output — A properly functioning injection pump maintains steady engine RPM and blade speed, critical for achieving a uniform concrete finish across large slabs.
- Fuel System Safety — A worn or failing injection pump can cause uncontrolled fuel delivery or hard starting; replacing it with a genuine OEM unit restores safe, predictable engine operation.
The injection pump is responsible for pressurizing and delivering precise amounts of diesel fuel into the engine's combustion chamber at exactly the right moment in the piston cycle. On a ride-on power trowel like the HHXD5, where consistent engine output directly affects blade pitch control and finishing quality, a properly operating injection pump is essential. When this component wears or fails, symptoms typically include rough idling, loss of power, excessive smoke, or an engine that refuses to start — all of which bring finishing operations to a halt.
For questions about fitment or to confirm this is the correct part for your machine, contact the DHS Equipment team before ordering.
Part Details
| Part Number | 825518 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Injection Pump Assembly |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HHXD5 |
| Whiteman Ride-On Power Trowels | HHXD5-ES |
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.
