Overview
The ZF 4143.000.130 2 HL 100 Hydrostatic Drive Assembly is a complete, ready-to-install unit engineered for precise power delivery in heavy-duty industrial transmissions. This assembly integrates the hydrostatic motor and pump components into a single sealed module, controlling variable speed and torque output within the driveline. As a core element of the HL 100 and HL 270 Series, the SKU 4143.000.130 replaces the original factory assembly to restore full hydraulic functionality. It works in concert with the 4143101009: HOUSING and the 4143301025: HOUSING to form the sealed pressure boundary, while the 0634313603: O-RING and 4475280018: SCREW PLUG ensure leak-free operation at the mounting interfaces.
Symptoms of Failure
- Hydrostatic drive slipping under load – A worn assembly loses internal pressure, causing the vehicle to creep or fail to maintain speed during heavy pulls.
- External oil leaks at housing seams – Deteriorated seals allow hydraulic fluid to escape, often visible as drips near the 4143101009: HOUSING or 4143301025: HOUSING.
- Erratic speed control or jerky starts – Internal wear in the hydrostatic unit leads to uneven fluid flow, causing hesitation or sudden lurching when engaging the drive.
- Excessive operating noise or whining – Cavitation or bearing degradation within the assembly produces a high-pitched whine, especially during acceleration or deceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.000.130 |
| Assembly Type | 2 HL 100 Hydrostatic Drive (Complete Unit) |
| Housing Material | High-strength cast iron |
| Weight (approx.) | 38 kg (83.8 lbs) |
| Overall Dimensions (L x W x H) | 420 mm x 280 mm x 240 mm |
| OEM Reference | ZF 4143.000.130 |
| Seal Type | Viton O-rings (compatible with mineral oils) |
| Max Operating Pressure | 250 bar (3625 psi) |
Compatibility
This hydrostatic drive assembly is designed for integration into ZF transmission models that utilize the HL 100 and HL 270 series architecture. It is commonly found in the WG180, WG200, and WG210 power shift transmissions, as well as certain variants of the 4WG-200 series. The unit also fits select models in the 5WG-300 family where a hydrostatic output is required for auxiliary functions. Always verify the housing configuration against your existing 4143101009: HOUSING and 4143301025: HOUSING to ensure proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the hydrostatic unit and provides mounting points |
| 4143301025 | HOUSING | Opposite housing half forming the pressure chamber |
| 0634313603 | O-RING | Seals the housing interface to prevent fluid loss |
| 4475280018 | SCREW PLUG | Closes hydraulic ports during service or storage |
| 0501342341 | SUPPORT RING | Reinforces O-ring grooves under high pressure |
| 4143298457 | SEAL KIT | Complete set of gaskets and O-rings for overhaul |
| 0634313591 | O-RING | Secondary seal for auxiliary ports |
| 0636101068 | CAP SCREW | Fastens the housing halves together |
| 4143221013 | THROTTLE VALVE | Controls fluid flow rate to the hydrostatic motor |
| 0634304484 | O-RING | Seals the throttle valve connection |
