The Wacker Neuson Piston is a genuine OEM component designed for a broad range of Wacker Neuson equipment, including BFS900-series floor saws, GV5000A and GV7000A portable generators, and BPU 3050A, BPU 3750Ats, and BPU 4045A reversible vibratory plate compactors. Sourced directly from Wacker Neuson, this OEM piston is manufactured to the exact tolerances required for these engines, ensuring consistent compression, proper combustion chamber geometry, and long service life. Compatible across multiple product families — from slab saws to generators to compaction equipment — this single part number covers a wide range of service scenarios. Always verify your model and machine number against the fitment list before ordering.
Key Features
- OEM Compression Tolerancing — Manufactured to exact bore and crown geometry specs, maintaining proper compression ratios critical for reliable engine starting and power output.
- Direct Engine Swap Fit — Drops into the cylinder bore as a factory-matched replacement; ring grooves and pin bore are dimensioned to align with OEM rings, pins, and connecting rods without reworking the bore.
- Wide Cross-Family Fitment — A single part number covering BFS900-series floor saws, GV5000A and GV7000A generators, and BPU 3050A, BPU 3750Ats, and BPU 4045A reversible vibratory plate compactors.
- Combustion Integrity — A worn or damaged piston causes loss of compression, hard starting, excessive oil consumption, and rough running; replacing with the correct OEM part restores full engine performance.
- Genuine Wacker Neuson Part — Supplied as an authentic OEM component, backed by the same quality controls applied to original production units — not a generic substitute.
The piston is the reciprocating component inside the engine cylinder that converts combustion pressure into mechanical force, driving the crankshaft and ultimately powering the machine. It must seal tightly against the cylinder wall — via its piston rings — to maintain compression and prevent combustion gases or oil from bypassing the combustion chamber. When a piston wears, cracks, or scores, compression drops sharply, causing hard starts, power loss, excessive smoke, and accelerated wear to surrounding engine components. Replacing it with the correct OEM piston, such as Wacker Neuson part 5100000371, restores the engine's compression and keeps your equipment running at rated output.
Part Details
| Part Number | 5100000371 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BFS940 | BFS940 | 5100029229, 5100054574 |
| GV5000A | GV5000A | 5000009346, 5000009351, 5000009361, 5100006204 |
| GV7000A | GV7000A | 5000009348, 5000009353, 5100006205 |
| 50Hz Portable Value Generator | GV5003A | 5000009347, 5000009362, 5100002154 |
| 50Hz Portable Value Generator | GV7003A | 5000009349, 5000009364, 5100002155 |
| BPU 3050A | BPU 3050A | 5000008763 |
| BPU 3050A US | BPU 3050A US | 5000610361 |
| BFS 935A SAW,BASIC | BFS 935AB | 5000008910 |
| BPU 3750Ats | BPU 3750Ats | 5000610408 |
| BPU3750Ats | BPU 3750Ats US | 5000610423 |
| Gasoline Reversible Vibratory Plate | BPU 3050 | 5000008955 |
| BFS 914AB SAW | BFS 914AB | 5000610092 |
| BPU 4045A US | BPU 4045A US | 5100009663, 5000610403 |
| Petrol Floor Saw BFS 940A | BFS 940A | 5000610327, 5100004004 |
| Vibratory plate BPU 4045A | BPU 4045A | 5000610345 |
| Floor Saw | BFS 914A | 5100004002 |
| Floor saw BFS940 | BFS 940 | 5100009934 |
| Vibration Plate | BPU3050A CN | 5100039661 |
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.
