Overview
The ZF 4143.000.152 2 HL 100 Hydrostatic Drive Assembly is a complete, ready-to-install unit designed for precise power transfer in heavy-duty industrial transmissions. This assembly integrates the hydrostatic pump and motor into a single sealed module, controlling vehicle speed and torque without mechanical clutch engagement. Positioned as the core hydraulic component within the HL 100 and HL 270 series, the SKU 4143.000.152 replaces worn or failed assemblies to restore full operational efficiency. For proper sealing during installation, pair this unit with a new 0634313603 O-RING to prevent fluid bypass.
Symptoms of Failure
- Hydrostatic drive slipping under load: A worn assembly loses internal pressure, causing the vehicle to hesitate or fail to move when under heavy load, especially on inclines.
- External oil leaks near the pump housing: Degraded seals or cracked housings allow hydraulic fluid to escape, leaving puddles under the transmission and reducing system pressure.
- Excessive noise or whining during operation: Internal bearing wear or cavitation produces a high-pitched whine or grinding sound, indicating imminent failure of the drive assembly.
- Erratic speed control or surging: A failing unit cannot maintain consistent output, leading to sudden speed changes or jerky movement even with steady throttle input.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4143.000.152 |
| Assembly Type | Hydrostatic Drive (2 HL 100) |
| Overall Length | 320 mm |
| Overall Width | 210 mm |
| Height | 180 mm |
| Dry Weight | 14.5 kg |
| Housing Material | High-strength aluminum alloy |
| OEM Reference | ZF 4143.000.152 |
| Seal Type | Nitrile rubber (NBR) |
| Max Operating Pressure | 250 bar |
Compatibility
This hydrostatic drive assembly is engineered for ZF transmission models that require a compact, high-torque hydraulic unit. It is a direct fit for the WG180, WG200, and WG210 series transmissions commonly found in agricultural tractors and construction loaders. The assembly also serves the HL 100 and HL 270 series, where it replaces the original 2 HL 100 unit. For complete housing integrity, always inspect the 4143101009 HOUSING and 4143301025 HOUSING for cracks during service. Secure the assembly with a 4475280018 SCREW PLUG to seal the fill port properly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101009 | HOUSING | Encloses the hydrostatic pump section |
| 4143301025 | HOUSING | Encloses the hydrostatic motor section |
| 0634313603 | O-RING | Seals the housing joint to prevent leaks |
| 4475280018 | SCREW PLUG | Closes the fill and drain ports |
| 0501342341 | SUPPORT RING | Reinforces O-ring seating under pressure |
| 4143298457 | SEAL KIT | Contains all seals for a full rebuild |
| 0634313591 | O-RING | Seals the throttle valve bore |
| 0636101068 | CAP SCREW | Fastens the housing halves together |
| 4143221013 | THROTTLE VALVE | Controls fluid flow to the drive |
| 0634304484 | O-RING | Seals the cap screw threads |
