Overview
The ZF 2094.122.413 PUMP DRIVE is a critical hydraulic power take-off component engineered specifically for the WG100, WG130, and WG131 series transmissions. This OEM genuine part transfers rotational energy from the transmission’s internal gearing to drive external hydraulic pumps, enabling auxiliary systems such as dump bodies, winches, or concrete mixers. The SKU 2094.122.413 integrates directly into the transmission’s power flow path, sitting between the main shaft and the pump mounting flange. For optimal sealing and structural integrity, this pump drive is often installed alongside the 2094101014: TRANSMISSION HOUSING and the 2094301046: HOUSING, which provide the necessary support and fluid containment.
Symptoms of Failure
- Hydraulic pump gear slipping under load: When the pump drive’s internal splines or bearings wear, the pump may lose torque transmission, causing intermittent or complete loss of hydraulic function during operation.
- Oil leaks around the pump mounting flange: Deterioration of the shaft seal or O-ring can lead to transmission fluid seeping past the drive unit, often visible as drips beneath the vehicle or equipment.
- Unusual whining or grinding noises from the transmission housing: Worn bearings within the 2094.122.413 assembly generate metallic sounds that intensify with engine RPM, indicating imminent failure.
- Erratic pump pressure or flow rates: A failing pump drive may cause inconsistent hydraulic output, leading to jerky cylinder movements or slow implement response times.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 2094.122.413 |
| OEM Reference | ZF 2094.122.413 |
| Material | Hardened alloy steel (gear) / Cast iron (housing) |
| Weight | 3.2 kg (7.1 lbs) |
| Overall Length | 145 mm |
| Flange Diameter | 102 mm |
| Spline Count | 14-tooth SAE A |
| Max Input Torque | 350 Nm |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This pump drive is designed for ZF’s WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used with the appropriate 2094298053: HOUSING adapter. The 2094.122.413 replaces earlier variants and is backward-compatible with most WG90 and WG120 builds. Always verify the 0630361034: SEALING CAP condition during installation to prevent contamination ingress.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094101014 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 2094301046 | HOUSING | Intermediate support for pump drive assembly |
| 2094298053 | HOUSING | Adapter housing for WG180/WG200 compatibility |
| 0630361034 | SEALING CAP | Prevents fluid leakage at shaft exit |
| 2094301071 | COVER | Protects internal components from debris |
| 2094301030 | GASKET | Seals mating surfaces against oil leaks |
| 0750111371 | SHAFT SEAL | Dynamic seal for rotating pump drive shaft |
| 0634303085 | O-RING | Static seal for housing joints |
| 0631306670 | CYLINDRICAL PIN | Alignment dowel for precise assembly |
| 0636011356 | HEXAGON SCREW | Fastener for securing pump drive to housing |
