Overview
The ZF 2094.122.010 PUMP DRIVE is a critical hydraulic power transfer component engineered specifically for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the mechanical interface that transmits rotational energy from the transmission’s internal geartrain to the external hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication circuits. The SKU 2094.122.010 mounts directly within the 2094101014: TRANSMISSION HOUSING, where it engages with the main drive shaft. Precision-machined splines and hardened bearing surfaces allow this pump drive to withstand continuous high-torque loads without deformation, making it indispensable for maintaining hydraulic pressure in heavy-duty industrial applications.
Symptoms of Failure
- Intermittent hydraulic pressure loss during cold starts — When the pump drive splines wear, the pump fails to achieve full engagement, causing erratic pressure readings and delayed clutch response in WG130 transmissions.
- Metallic debris in transmission oil filter — Flaking or spalling on the drive gear surface produces fine steel particles that accumulate in the filter, often mistaken for general wear but traceable to the 2094.122.010 unit.
- Audible whining or grinding noise from pump area — Worn bearings inside the pump drive create a high-pitched whine that intensifies under load, particularly when the transmission is hot.
- Oil seepage around the pump mounting flange — A compromised seal between the pump drive and the 2094301046: HOUSING allows hydraulic fluid to escape, leaving visible wet spots on the transmission exterior.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2094.122.010 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Overall Length | 142 mm |
| Spline Diameter | 28 mm (12-tooth involute) |
| Max Operating Torque | 180 Nm |
| OEM Reference | ZF 2094.122.010 |
| Sealing Surface Finish | Ra 0.4 µm |
Compatibility
This pump drive is factory-specified for the ZF WG100, WG130, and WG131 powershift transmission families. It also fits select WG180 and WG200 variants when used with the appropriate 2094298053: HOUSING adapter. The part is not interchangeable with WG210 or WG250 series units due to differing spline counts. Always verify the 0630361034: SEALING CAP condition during installation, as a worn cap can allow contamination into the pump drive cavity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101014 | TRANSMISSION HOUSING | Main structural casing that encloses the pump drive assembly |
| 2094301046 | HOUSING | Intermediate mounting bracket for pump drive alignment |
| 2094298053 | HOUSING | Adapter housing for WG180/WG200 compatibility |
| 0630361034 | SEALING CAP | Prevents debris ingress into pump drive cavity |
| 2094301071 | COVER | Protective cover over pump drive access port |
| 2094301030 | GASKET | Sealing layer between pump drive and housing |
| 0750111371 | SHAFT SEAL | Dynamic seal preventing oil leakage along rotating shaft |
| 0634303085 | O-RING | Static seal for pump drive flange interface |
| 0631306670 | CYLINDRICAL PIN | Alignment dowel for precise pump drive positioning |
| 0636011356 | HEXAGON SCREW | Fastener securing pump drive to housing |
