The Wacker Neuson Piston is a genuine OEM component designed for a wide range of Wacker Neuson diaphragm trash pumps, walk-behind concrete trowels, vibratory plate compactors, and gasoline power units. As a direct factory-sourced part, the is manufactured to the same specifications as the original, ensuring a correct fit across all compatible machines without guesswork. Fitment includes the PDT2A and PDT3A diaphragm trash pump series, PDI2A and PDI3A inline diaphragm trash pump series, CT30ADT and CT30ADT-E walk-behind trowels, VP1135A and VP1135AW vibratory plates, WP1235A and WP1235Aw single-direction plate compactors, AP1135A battery-powered plates, PG2A power units, and the A3000 gasoline power unit for internal vibrators. Sourcing the genuine OEM means you get a part engineered to perform exactly as Wacker Neuson intended, protecting the integrity of whichever machine it serves.
Key Features
- Genuine OEM Precision: — Factory-sourced to exact dimensional and material tolerances, ensuring the piston seals and travels correctly within its bore for consistent pressure output.
- Drop-In Compatibility: — Matches the original mounting geometry and bore size, fitting directly into the crankcase or pump housing without machining or shimming.
- Broad Cross-Family Fitment: — Covers PDT2A, PDT3A, PDI2A, PDI3A diaphragm pumps; CT30ADT and CT30ADT-E trowels; VP1135A, VP1135AW, WP1235A, WP1235Aw, and AP1135A plates; PG2A power units; and the A3000 gasoline power unit.
- Sustained Compression Performance: — A correctly fitted piston maintains cylinder pressure and stroke efficiency; a worn or cracked piston causes power loss, rough running, and hard starting across any of the machines it serves.
- Pump-Critical Reliability: — In diaphragm pump applications, the piston drives fluid displacement; a failed piston results in immediate loss of pumping capacity, making timely replacement essential to keeping the pump operational.
The piston is a reciprocating component that moves back and forth inside a cylinder bore, converting rotational crankshaft motion into linear force. In engine-driven equipment, this linear force compresses the air-fuel mixture to generate power; in diaphragm pump applications, piston movement drives the diaphragm to create the suction and discharge pressure needed to move fluid. When a piston wears, cracks, or loses its ring seal, the machine loses compression or pumping efficiency — symptoms that appear as weak performance, excessive vibration, or a complete failure to start or prime. Replacing a damaged piston with the correct OEM part restores full mechanical function and protects surrounding components such as cylinder walls, rings, and connecting rods from accelerated wear.
Part Details
| Part Number | 5000081788 |
|---|---|
| Old Part Number | 0081788 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| 50mm/2in Diaphragm Trash Pump | PDT2A | 5000007610, 5000007611 |
| 75mm/3in Diaphragm Trash Pump | PDT3A | 5000007614, 5000007615, 5000007616 |
| 50mm/2in Inline Diaphragm Tras h Pump | PDI2A | 5000007624, 5000007625 |
| 75mm/3in Inline Diaphragm Tras h Pump | PDI3A | 5000007628, 5000007629, 5000009407 |
| PG2A | PG2A | 5000007658, 5000009054 |
| 762mm/30in CE Walk-behind Trow el | CT30ADT | 5000008005, 5000008001, 5000008197 |
| VP1135AW VIBROPLATE | VP1135AW | 5000009058, 5000630060 |
| VP1135A VIBROPLATE | VP1135A | 5000009057, 5000630059 |
| Gasoline Power Unit for Intern al Vibrator | A3000 | 5000006237 |
| 762mm/30in CE Walk-behind Trow el | CT30ADT-E | 5000007587, 5000008002 |
| Single direction vibratory plate WP1235A | WP1235A | 5000630016 |
| Single Direction Plates | WP1235Aw | 5000630103 |
| Single Direction Plates | WP1235Aw-L | 5000630104, 5000630105 |
| Single Direction Plates | WP1235Aw-LL | 5000630122 |
| Single Direction Plates | AP1135A | 5000009519 |
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.
