The Wacker Neuson Oil Pump Outer Rotor is a genuine OEM Oil Pump Outer Rotor designed for a broad range of Wacker Neuson equipment, including the RD12A-90 tandem roller series, BFS 2020AS saw, GS12Ai, CRT36-26A and CRTv36-26A trowels, and the GPS9700A. As a factory-sourced component, part meets the exact dimensional and material tolerances specified for your machine's lubrication system. This rotor slots directly into the oil pump assembly as a drop-in replacement, restoring proper oil flow without the need for secondary machining or fitment adjustments. Keeping a verified OEM part in the pump ensures the engine or hydraulic circuit receives consistent lubrication throughout the duty cycle.
Key Features
- OEM Rotor Geometry: — Manufactured to Wacker Neuson's exact lobe profile and outer diameter tolerances, maintaining the displacement volume the pump was engineered to deliver.
- Direct-Fit Replacement: — Machined to match the original housing bore and shaft clearances of the 5000226435 pump assembly, so it seats and seals correctly on installation.
- Broad Model Coverage: — A single part number covers the RD12A-90 roller series, CRT36-26A and CRTv36-26A trowels, BFS 2020AS saw, GS12Ai, and GPS9700A generator.
- Sustained Oil Pressure: — A correctly fitted outer rotor maintains the tight clearances needed for consistent pressure; a worn or damaged rotor causes pressure drop, leading to accelerated wear on bearings and running surfaces.
- Genuine Wacker Neuson Part: — Sourced directly from Wacker Neuson, carrying the same part number (5000226435) referenced in the official parts catalog for full traceability.
The outer rotor is one of two rotor elements inside a gerotor-style oil pump. As the inner rotor turns, the outer rotor follows, and the changing volume between their lobes draws oil in from the sump and pushes it through the system under pressure. This pressurized flow reaches bearings, journals, and other wear surfaces to keep friction and heat in check. When the outer rotor wears, loses its profile, or develops excessive clearance against the housing, the pump can no longer build adequate pressure — oil starvation follows quickly, causing rapid internal wear or engine seizure. Replacing the outer rotor at the first sign of pressure loss or unusual engine noise is the fastest way to restore full lubrication capacity.
Part Details
| Part Number | 5000226435 |
|---|---|
| Old Part Number | 0226435 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Oil Pump Outer Rotor |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| RD12A-90 ROLLER,DBL DRUM,GRN | RD12A-90 | 5000620369, 5000620058, 5000620320 |
| BFS 2020AS SAW | BFS 2020AS | 5000620086 |
| 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.
