Overview
The ZF 2095.122.002 PUMP DRIVE is a critical hydraulic power transfer component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part serves as the primary interface between the transmission’s internal gearing and the external hydraulic pump, ensuring consistent oil flow for clutch actuation and lubrication. The SKU 2095.122.002 is precision-machined to ZF’s original tolerances, directly mounting onto the transmission housing to drive the pump shaft without misalignment. When paired with a robust 2095109015 DIFFERENTIAL, this pump drive maintains stable hydraulic pressure under heavy load conditions, making it indispensable for industrial drivetrains requiring reliable power take-off.
Symptoms of Failure
- Hydraulic pressure drop under load: A worn pump drive gear or spline causes insufficient oil delivery, leading to delayed clutch engagement and transmission slipping during acceleration.
- Audible whining or grinding from the pump area: Damaged bearing surfaces on the 2095.122.002 produce a high-pitched noise that intensifies with engine RPM, indicating imminent gear tooth failure.
- External oil seepage near the pump mounting flange: Cracks or wear on the drive shaft seal surface allow ATF to leak, leaving visible drips under the vehicle after extended operation.
- Erratic shifting or transmission overheating: Inconsistent pump output from a failing drive forces the transmission to run at higher internal temperatures, triggering warning codes on electronic control units.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 2095.122.002 |
| Material | Case-hardened alloy steel (16MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Overall Length | 142 mm |
| Spline Diameter | 28 mm (internal) |
| Mounting Bolt Pattern | 4x M10 on 85 mm PCD |
| OEM Reference | ZF 2095.122.002 |
| Max Operating Pressure | 25 bar (362 psi) |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This pump drive is specifically designed for ZF’s WG-series powershift transmissions. It directly fits the WG100, WG130, and WG131 models, which are commonly used in agricultural tractors, construction loaders, and material handling equipment. The 2095.122.002 also shares mounting interfaces with the WG180 and WG200 series when used with an adapter plate, though OEM verification is recommended. For differential assemblies, the 2095209037 DIFFERENTIAL and the 2095309059 DIFF.HOUSING are common companion parts in the same gear train. Additionally, the 0750117075 TAPER ROLLER BEARING supports the pump drive shaft in many rebuild kits, ensuring axial load capacity during high-torque operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2095109015 | DIFFERENTIAL | Distributes torque between axles in the final drive |
| 0750117075 | TAPER ROLLER BEARING | Supports radial and axial loads on rotating shafts |
| 2095209037 | DIFFERENTIAL | Secondary differential for multi-axle configurations |
| 2095309059 | DIFF.HOUSING | Encloses differential gears and bearings |
| 0631329086 | SPRING PIN | Secures pump drive gear to shaft |
| 0730300820 | THRUST WASHER | Reduces axial friction in gear sets |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel hubs |
| 2095309081 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Spacer for differential pinion gears |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Mesh with axle bevel gears for torque split |
