The Wacker Neuson Injection Nozzle is a genuine OEM component designed for the PT2H centrifugal trash pump series and a wide range of DPU and DPS reversible and single-direction vibratory plate compactors. As a direct OEM replacement, this nozzle is manufactured to the exact tolerances required by Wacker Neuson diesel-powered equipment, ensuring correct fuel atomization and consistent engine performance. Fitment spans the PT2H pump, DPU 2440H, DPU 2450H, DPU 2540H, DPU 2550H, DPU 2560H, DPU 2560H-TS, DPS 1850H Basic, DPS 1850H Asphalt, and DPS 1850H Vario — covering both standard and updated production runs. Keeping part number on hand means your diesel-powered Wacker Neuson equipment stays running at its rated output with no improvised substitutions.
Key Features
- Calibrated Fuel Atomization: — Manufactured to OEM spray-pattern and flow-rate specifications, delivering the correct fuel-air mixture for clean combustion in Wacker Neuson diesel engines.
- Drop-In Nozzle Replacement: — Matches the original mounting thread, body dimensions, and tip geometry, seating directly into the injector body without modification.
- Broad Diesel Equipment Coverage: — A single part number covers the PT2H trash pump plus ten DPU and DPS vibratory plate compactor models, including Basic, Asphalt, Vario, and TS configurations.
- Sustained Engine Output: — A worn or clogged injection nozzle causes hard starting, rough idling, excessive smoke, and loss of rated power; a fresh OEM nozzle restores full engine response and fuel efficiency.
- Fuel System Safety Compliance: — Correct nozzle opening pressure prevents raw-fuel leakage into the combustion chamber, reducing the risk of engine damage, oil dilution, and uncontrolled combustion events.
The injection nozzle is the precision tip of the fuel delivery system in a diesel engine. It receives high-pressure fuel from the injection pump and atomizes it into a fine mist at the exact moment the piston reaches compression — creating the conditions needed for complete, controlled combustion. When a nozzle wears, its spray pattern degrades: fuel is no longer atomized evenly, leading to incomplete combustion, increased exhaust smoke, reduced power output, and elevated heat stress on surrounding engine components. In the worst case, a failed nozzle can dribble raw fuel into the cylinder, washing lubricating oil from the cylinder walls and causing accelerated wear or engine seizure. Replacing the nozzle with a genuine OEM part like the Wacker Neuson 5000129521 restores the correct spray pattern and opening pressure, protecting both the engine's performance and its long-term service life.
Part Details
| Part Number | 5000129521 |
|---|---|
| Old Part Number | 0129521 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Injection Nozzle |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| PT2H Pump | PT2H | 5000009094, 5000009097, 5000009239 |
| Reversible Vibratory Plate, 24 kN, 40cm/16in | DPU 2440H | 5000007870 |
| Single Direction Vibratory Pla te, 18kN, 50cm/20in | DPS 1850H | 5000008397, 5000008750 |
| Vibration plate DPU 2450H | DPU 2450H | 5000008746 |
| DPU2540H VIBROPLATE | DPU 2540H | 5000008755, 5000610035 |
| vibration plate DPU 2550 H | DPU 2550H | 5000008756, 5000610036 |
| vibration plate DPU 2560H | DPU 2560H | 5000008757, 5000610037 |
| DPU 2560H-TS-VIBROPLATE | DPU 2560H-TS | 5000610005, 5000610038 |
| vibration plate DPS 1850H | DPS1850H Basic | 5000008924, 5000610032 |
| vibration plate DPS 1850H | DPS1850H Asphalt | 5000008925, 5000610033 |
| vibration plate DPS 1850H | DPS1850H Vario | 5000008926, 5000610034 |
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.
