The Wacker Neuson Flywheel is a genuine OEM Flywheel designed for the RD12A-90 Tandem Roller, GS12Ai, CRT36-26A Trowel, CRTv36-26A Trowel, and GPS9700A series machines. Sourced directly from Wacker Neuson, this is the same part built to the original design specification — ensuring a direct, confidence-inspiring replacement when your existing flywheel needs service. Fitment has been verified across multiple configurations within the RD12A-90, CRT36-26A, and CRTv36-26A lineups, including foldable ROPS and wheel kit variants.
Key Features
- Genuine OEM Mass and Balance Specification — Manufactured to the exact rotational mass and balance tolerances Wacker Neuson engineered into the original machine, keeping ignition timing and engine harmonics consistent.
- Direct Bolt-On Replacement — Matches the original mounting interface, keyway, and taper profile so it installs onto the crankshaft the same way the factory unit did — no reworking required.
- Broad Verified Fitment — Confirmed fit across the RD12A-90 Tandem Roller series, GS12Ai, CRT36-26A and CRTv36-26A Trowel configurations, and GPS9700A generator.
- Consistent Ignition Performance — A correctly spec'd flywheel maintains the precise magnetic timing relationship with the ignition module, supporting clean starts and steady engine output across demanding compaction and finishing applications.
- Electrical Safety Compliance — The flywheel's integrated magneto magnets are a critical part of the charging and ignition circuit; using a genuine OEM unit ensures correct magnetic field strength and insulation integrity, reducing risk of charging faults or ignition failure in the field.
The flywheel is a heavy rotating disc mounted directly on the engine crankshaft. Its primary job is to store rotational energy between combustion strokes, smoothing out power delivery and keeping the engine running evenly under load. On small engine-powered equipment like compaction rollers and power trowels, the flywheel also carries the permanent magnets that generate the electrical charge for the ignition system and, in many cases, the battery charging circuit. When a flywheel cracks, loses a magnet, or develops a worn keyway, the result is typically a weak or absent spark, erratic engine behavior, or a no-start condition — all of which bring work to a halt until the part is replaced.
Part Details
| Part Number | 5000226502 |
|---|---|
| Old Part Number | 0226502 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Flywheel |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 ROLLER,DBL DRUM,GRN | RD12A-90 | 5000620369, 5000620058, 5000620320 |
| GS12Ai | GS12AI | 5000620317 |
| CRT36-26A Trowel w/Wheel Kit | CRT36-26A | 5000621000, 5000620999, 5000621001, 5000621002 |
| CRTv 36-26A Trowel, w/Wheel Kit | CRTv36-26A | 5200008544, 5200008545, 5200008546 |
| GPS9700A | GPS9700A | 5100042221 |
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.
