The Wacker Neuson Piston Ring Set (0,25) is a genuine OEM component designed for a broad range of Wacker Neuson BFS floor saws, BPU reversible vibratory plate compactors, and GV portable generators. As a direct OEM replacement, part number is manufactured to the same specifications as the original, ensuring it seats and seals correctly within the cylinder bore. This 0.25 mm oversize set is intended for engines that have been bored to the first oversize dimension, making it the correct choice after cylinder reconditioning. Compatible models include the BFS 914A, BFS 914AB, BFS 935AB, BFS 940, BFS 940A, BPU 3050A, BPU 3050A US, BPU 3750Ats, BPU 3750Ats US, BPU 4045A, BPU 4045A US, GV5000A, and GV5003A series.
Key Features
- Genuine OEM Ring Geometry — Manufactured to original bore and tension specifications for correct compression sealing in the cylinder, not a generic substitute.
- First Oversize (0,25 mm) Fitment — Sized specifically for cylinders bored 0.25 mm over standard, so the rings install to the correct clearance after a machine has been reconditioned.
- Broad Model Coverage — A single part number covers BFS floor saws, BPU 3050A, BPU 3750Ats, and BPU 4045A reversible plate compactors, plus GV5000A and GV5003A portable generators.
- Restored Compression and Oil Control — Properly seated piston rings maintain cylinder pressure and control oil consumption; worn rings cause hard starting, power loss, and excessive exhaust smoke.
- Fuel System Integrity — Correct ring tension prevents unburned fuel from bypassing the piston (blow-by), protecting the crankcase oil and downstream engine components from fuel contamination.
Piston rings form a dynamic seal between the piston and the cylinder wall, serving two critical roles: holding combustion pressure above the piston so the engine generates full power, and scraping excess oil back down the cylinder wall to prevent it from burning in the combustion chamber. When rings wear, crack, or lose tension, compression drops, the engine becomes hard to start, loses pulling power, and may begin consuming oil or producing blue exhaust smoke. Because the 5100001284 is an oversize set, it is used during an engine rebuild after the cylinder bore has been honed or bored to 0.25 mm over standard — installing the correct oversize rings at that stage is essential for achieving a proper seal and restoring the engine to full operating condition.
Part Details
| Part Number | 5100001284 |
|---|---|
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Piston Ring Set (0,25) |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| BFS940 | BFS940 | 5100029229, 5100054574 |
| GV5000A | GV5000A | 5000009346, 5000009351, 5000009361, 5100006204 |
| 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 |
| GV5003A | GV5003A | 5100002154 |
| 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.
