Overview
The ZF 0501.209.267 ROTOR SET is a precision-engineered hydraulic component designed for the internal oil pump assembly within heavy-duty ZF transmissions. This OEM genuine part, identified by SKU 0501.209.267, is responsible for generating the necessary fluid pressure to actuate clutch packs and maintain lubrication throughout the gear train. Positioned directly on the pump drive shaft inside the main housing, the rotor set consists of an inner and outer rotor that work in tandem to create a consistent, high-volume oil flow. When installed correctly, it ensures smooth power delivery and thermal stability in demanding construction machinery applications.
Symptoms of Failure
- Erratic gear engagement or slipping: A worn rotor set reduces hydraulic pressure, causing clutches to engage slowly or slip under load, especially when the transmission is hot.
- Low or fluctuating transmission oil pressure: If the rotor tips or internal sealing surfaces are scored, the pump cannot maintain steady pressure, triggering warning lights or diagnostic codes.
- Whining or grinding noise from the transmission pump: Metal-to-metal contact from a damaged rotor set produces a distinct high-pitched whine that increases with engine RPM.
- Overheating transmission fluid: Inefficient oil circulation due to rotor wear leads to inadequate cooling, causing the fluid to degrade and the transmission to overheat during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.209.267 |
| OEM Reference | ZF 0501.209.267 |
| Material | Sintered steel alloy with hardened wear surfaces |
| Outer Rotor Diameter | Approx. 65 mm |
| Inner Rotor Diameter | Approx. 38 mm |
| Rotor Height | 22 mm |
| Weight | 0.35 kg (0.77 lbs) |
| Compatible Seal Kit | 0634801057: SEALING RING |
Compatibility
This rotor set is primarily engineered for ZF WG180, WG200, and WG210 series powershift transmissions commonly found in wheel loaders, graders, and dump trucks. It also fits select variants of the ZF 4WG-200 and 6WG-200 models used in construction machinery. For precise fitment, always verify the transmission serial number against the OEM parts catalog. When replacing this rotor set, we strongly recommend inspecting the 4143101022: HOUSING and 4143301044: HOUSING for scoring or wear, as these components directly affect rotor alignment. Additionally, the 0631329135: SPRING PIN and 0636302014: SCREW PLUG should be replaced concurrently to ensure a leak-free assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101022 | HOUSING | Encloses the rotor set and directs oil flow |
| 4143301044 | HOUSING | Secondary housing for pump support |
| 0631329135 | SPRING PIN | Secures rotor alignment to the shaft |
| 0636302014 | SCREW PLUG | Seals oil passages in the pump body |
| 0634801057 | SEALING RING | Prevents fluid bypass between rotors |
| 4143301053 | CONNECTING PART | Links pump housing to transmission case |
| 0636100600 | CAP SCREW | Fastens housing components together |
| 0636101024 | CAP SCREW | High-torque fastener for pump assembly |
| 0730365159 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for precise housing positioning |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
