The Wacker Neuson Piston (Std) is a genuine OEM standard piston designed for a wide range of Wacker Neuson equipment including BFS floor saws, CT walk-behind concrete trowels, GV portable generators, BPU reversible vibratory plate compactors, PT trash pumps, and HPG vibratory truss screed power sections. As a factory-sourced component, this piston is manufactured to the exact tolerances required by the original engine design, ensuring proper combustion, compression, and cylinder fit. It covers an extensive fitment range across the BFS935, BFS940, CT36, CT48, GV5000A, GV5003A, BPU3050, BPU3750Ats, BPU4045A, PT3A, and HPG50/HPG100 series, among others. Keeping an authentic OEM piston on hand minimizes unplanned engine downtime and ensures the machine returns to full operating spec after a rebuild.
Key Features
- OEM Combustion Tolerances Met — Manufactured to the exact bore diameter and ring-groove specifications of the original engine, ensuring correct compression ratio and combustion efficiency across all fitted models.
- Drop-In Engine Rebuild Component — Engineered to install directly into the original cylinder bore without additional machining, compatible with the standard ring and pin configuration of the host engine.
- Broad Cross-Family Fitment — A single part number that spans BFS floor saws, CT walk-behind trowels, GV generators, BPU reversible vibratory plates, PT3A trash pumps, and HPG screed power sections — ideal for dealers and service shops stocking for multiple machine types.
- Restored Engine Compression — A worn or scored piston causes loss of compression, hard starting, excessive oil consumption, and reduced power output; replacing with 5100000365 restores the engine's designed power and fuel efficiency.
- Genuine Wacker Neuson OEM Part — Sourced directly from Wacker Neuson, carrying the same part number used in factory assembly and authorized service repairs.
The piston is a core reciprocating component inside the engine cylinder. It travels up and down within the bore, compressing the air-fuel mixture on the upstroke and transferring the force of combustion to the crankshaft via the connecting rod on the power stroke. When a piston wears, develops scoring, or suffers ring-groove damage, the engine loses compression, burns oil, and delivers noticeably less power — eventually becoming difficult or impossible to start. Replacing the piston with a correctly sized standard-bore unit like the Wacker Neuson 5100000365 restores the tight cylinder seal needed for reliable engine operation across all the equipment families this part serves.
Part Details
| Part Number | 5100000365 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston (Std) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BFS940 | BFS940 | 5100029229, 5100054574 |
| GV5000A | GV5000A | 5000009346, 5000009351, 5000009361, 5100006204 |
| 50Hz Portable Value Generator | GV5003A | 5000009347, 5000009362, 5100002154 |
| 915mm/36in CE Walk-behind Trow el | CT36AGP | 5000007596, 5000007595 |
| 915mm/36in CE Walk-behind Trow el | CT36AGP-E | 5000008036, 5000008026 |
| 1220mm/48in Walk-behind Trowel | CT48ADP | 5000007598, 5000007599, 5000008199 |
| 1220mm/48in CE Walk-behind Tro wel | CT48ADP-E | 5000008027, 5000008028 |
| 915mm/36in CE Walk-behind Trow el | CT36AGT-E | 5000007594, 5000008012 |
| 1220mm/48in CE Walk-behind Tro wel | CT48ADT-E | 5000007597, 5000008016 |
| 915mm/36in CE Walk-behind Trow el | CT36AGT | 5000008014, 5000008011 |
| 1220mm/48in Walk-behind Trowel | CT48ADT | 5000008015, 5000008040 |
| BPU 3050A | BPU 3050A | 5000008763 |
| 915mm/36in Variable Speed Walk #NAME? | CT36AVP | 5000009235, 5000009236 |
| HPG100A | HPG100A | 5000009507 |
| 75mm/3in Centrifugal Trash Pum p | PT3A | 5000006729, 5000006730, 5100058535, 5100058536 |
| BFS 935A SAW,BASIC | BFS 935AB | 5000008910 |
| 915mm/36in Variable Speed Walk #NAME? | CT36AVT | 5000009233, 5000009234 |
| Single Direction Vibratory Pla te, 25kN, 50cm/20in | BPS 2550A | 5000007528 |
| HPG50A | HPG50A | 5000009509 |
| BPU 3050A US | BPU 3050A US | 5000610361 |
| Gasoline Reversible Vibratory Plate | BPU 3050 | 5000008955 |
| BFS 914AB SAW | BFS 914AB | 5000610092 |
| BPU 3750Ats | BPU 3750Ats | 5000610408 |
| BPU3750Ats | BPU 3750Ats US | 5000610423 |
| Petrol Floor Saw BFS 940A | BFS 940A | 5000610327, 5100004004 |
| Reversible Plates | MPU 29A | 5000630244 |
| Vibratory plate BPU 4045A | BPU 4045A | 5000610345 |
| BPU4045A-VIBROPLATE | BPU 4045A US | 5000610403, 5100009663 |
| Vibratory Truss Screed, Power Section | HPG100 | 5000008293 |
| Vibratory Truss Screed, Power Section | HPG50 | 5000008294 |
| Floor Saw | BFS 914A | 5100004002 |
| Floor saw BFS940 | BFS 940 | 5100009934 |
| Vibration Plate | BPU3050A CN | 5100039661 |
| BT48A | BT48A | 5100081471 |
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.
