The Multiquip 820406 HHN31V Exhaust Valve Spring is a genuine OEM component designed for the HHN31V Whiteman ride-on mechanical power trowel. Sourced directly from Multiquip, this spring is manufactured to the exact specification required for correct valve operation on the HHN31V. Confirmed fitment for the HHN31V gives you the confidence to order without cross-referencing guesswork. DHS Equipment stocks genuine Multiquip parts so you can get your trowel back in service fast.
Key Features
- Genuine OEM Valve Spring Tension — Manufactured to the precise tension rating required for correct exhaust valve seating on the HHN31V engine, ensuring consistent valve closure with every cycle.
- Direct Drop-In Replacement — Matches the original spring dimensions and seat profile, seating correctly in the valve retainer without modification to the valve train.
- Confirmed HHN31V Fitment — Specifically listed for the Whiteman HHN31V 8-foot heavy-duty ride-on mechanical trowel — no compatibility guesswork required.
- Protects Engine Valve Train Integrity — A fatigued or broken exhaust valve spring causes poor valve sealing, loss of compression, and uneven trowel performance; replacing it restores full engine output.
- Fuel System Safety Relevance — Proper exhaust valve closure prevents combustion blowback into the intake system, supporting safe and stable engine operation during extended troweling runs.
The exhaust valve spring holds the exhaust valve firmly closed during the intake and compression strokes of the engine cycle, ensuring combustion gases exit only at the correct moment. When this spring loses tension or breaks, the exhaust valve can float or fail to seat properly, leading to compression loss, rough running, and reduced power output at the trowel blades. Replacing a worn exhaust valve spring with the correct OEM-specification part restores proper valve timing and keeps the engine performing at its rated output.
Part Details
| Part Number | 820406 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | HHN31V Exhaust Valve Spring |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HHN31V |
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.
