The Wacker Neuson Upper Vibration Valve is a genuine OEM component designed for the WPP 1540 and WPP 1550 series reversible plate compactors, as well as WPU 1550A and WPU 1550Aw models. As a direct OEM replacement sourced from Wacker Neuson, part is manufactured to the same specifications as the original, ensuring a correct, drop-in installation with no guesswork. This valve services a broad range of WPP and WPU reversible plate models, covering both standard and wet-kit configurations across the 1540 and 1550 series. Keeping this valve in proper working order is essential to maintaining consistent compaction force and directional control on the plate.
Key Features
- OEM-Spec Valve Construction — Manufactured to Wacker Neuson's original pressure and flow tolerances, ensuring the valve opens and closes at the correct operating points without bypass or pressure loss.
- Direct-Install Replacement — Engineered to match the original upper mounting position and port configuration, so the valve seats correctly without re-machining or adapter fittings.
- Broad WPP and WPU Series Coverage — Fits WPP 1540A, WPP 1540W, WPP 1550A, WPP 1550W, WPU 1550A, WPU 1550Aw, and their wet-kit variants, plus WPU 1550A-L reversible plates.
- Restores Full Compaction Force — A worn or stuck vibration valve reduces exciter output and uneven compaction. Replacing it brings the vibration system back to full operating amplitude.
- Maintains Directional Control Integrity — On reversible plates, the vibration valve is directly tied to forward and reverse plate movement; a failing valve can cause sluggish or unresponsive directional travel.
The upper vibration valve regulates hydraulic flow within the exciter circuit of a reversible plate compactor, controlling the direction and intensity of vibration delivered to the baseplate. By managing fluid pressure at the upper port of the vibration system, this valve allows the machine to shift compaction force and drive direction in response to operator input. When the valve wears, sticks, or fails to seal properly, the result is reduced plate frequency, loss of directional responsiveness, or an inability to reverse — all of which directly compromise compaction quality and operator control.
Part Details
| Part Number | 5000400346 |
|---|---|
| Old Part Number | 0400346 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Upper Vibration Valve |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| WPU1550A | WPU1550A | 5000630033 |
| WPU1550Aw | WPU1550Aw | 5000630034 |
| WPP 1550Aw | WPP1550Aw | 5000630030 |
| WPP 1540A | WPP1540A | 5000630025 |
| WPP 1540W | WPP1540W | 5000630027 |
| WPP 1550A | WPP1550A | 5000630029 |
| WPP 1550W | WPP1550W | 5000630031 |
| WPP 1550Ww | WPP1550Ww | 5000630032 |
| WPP 1540Aw | WPP1540Aw | 5000630026 |
| WPP 1540Ww | WPP1540Ww | 5000630028 |
| Reversible Plates | WPU 1550A-L | 5000630124 |
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.
