Overview
The ZF 4143.020.214 2 HL 290 Hydrostatic Drive Assembly is a complete, high-torque hydraulic motor unit engineered for precise speed and directional control in heavy-duty industrial transmissions. This SKU 4143.020.214 serves as the core power conversion component within the ZF HL 100 and HL 270 series, converting hydraulic pressure into mechanical rotation to drive the vehicle’s final drives. When installed, this assembly integrates directly with the 4143101030: HOUSING and the 4143301055: HOUSING to form a sealed, high-pressure circuit. It is a direct OEM replacement unit, ensuring factory-specified performance for wheel loaders, forklifts, and agricultural tractors.
Symptoms of Failure
When the ZF 4143.020.214 hydrostatic drive begins to fail, operators will notice distinct performance degradation. Common failure indicators include:
- Hydrostatic drive slipping under load: The unit loses torque capacity, causing the machine to hesitate or stall when pushing heavy materials.
- External oil leaks at the motor shaft seal: Hydraulic fluid pools around the drive assembly, often traced back to a worn seal or damaged 0631329135: SPRING PIN that secures internal components.
- Erratic speed control or jerky operation: The drive fails to maintain smooth, proportional speed, leading to sudden lurches during low-speed maneuvering.
- Excessive noise (whining or grinding): Internal bearing wear or cavitation produces a high-pitched whine, indicating imminent failure of the rotating group.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4143.020.214 |
| Assembly Type | 2 HL 290 Hydrostatic Drive (Complete Unit) |
| Displacement | 90 cc/rev (estimated) |
| Maximum Operating Pressure | 420 bar (6,100 psi) |
| Housing Material | High-strength cast iron |
| Dry Weight | Approx. 38 kg (83.8 lbs) |
| OEM Reference | ZF 4143.020.214 |
| Seal Type | PTFE / Nitrile (dual-lip) |
Compatibility
This hydrostatic drive assembly is designed for use in ZF transmission models that require a 2 HL 290 motor. It is a direct fit for the WG180, WG200, and WG211 series transmissions, commonly found in telehandlers and compact loaders. It also integrates with the HL 100 and HL 270 series power split drives. For proper installation, the unit must be paired with a compatible 4143298040: CASE to ensure correct alignment of the internal gear set.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101030 | HOUSING | Encloses the drive motor and supports bearing loads |
| 4143301055 | HOUSING | Secondary housing for the planetary gear stage |
| 4143298040 | CASE | Outer structural case for the hydrostatic unit |
| 0631329135 | SPRING PIN | Locks the drive shaft to the coupling |
| 0501214034 | SEALING CAP | Prevents debris ingress into the port block |
| 0636101024 | CAP SCREW | Secures the housing halves together |
| 4475280099 | SCREW PLUG | Seals the pressure test port |
| 0634303266 | O-RING | Provides static seal between flanges |
| 0501200072 | VENT VALVE | Relieves internal case pressure |
| 4475280015 | SCREW PLUG | Closes the drain port |
