Overview
The ZF 4143.020.213 2 HL 290 Hydrostatic Drive Assembly is a complete, pre-assembled unit designed to manage variable-speed power delivery within ZF’s HL 100 and HL 270 series transmissions. This assembly integrates the hydraulic pump and motor into a single sealed module, converting engine torque into infinitely variable output for heavy-duty mobile machinery. The SKU 4143.020.213 serves as a direct replacement for worn or failed hydrostatic units, restoring precise control in wheel loaders, telehandlers, and industrial tractors. It sits at the heart of the transmission, directly coupling to the 4143101043: HOUSING and the 4143301055: HOUSING to form the main structural enclosure.
Symptoms of Failure
- Erratic machine creep or loss of drive under load: When the hydrostatic drive assembly wears internally, the unit fails to maintain pressure, causing the vehicle to drift unexpectedly or lose traction when pushing heavy loads.
- Excessive oil leakage around the drive assembly seals: Worn piston rings or damaged shaft seals allow hydraulic fluid to escape, often pooling near the 4143298040: CASE interface, leading to low oil levels and overheating.
- High-pitched whining or grinding noise during operation: Internal bearing degradation or cavitation within the hydrostatic unit produces audible distress, particularly when transitioning from forward to reverse.
- Inconsistent speed control or jerky acceleration: A failing swash plate or control valve causes the drive to surge or hesitate, making smooth operation impossible and increasing operator fatigue.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4143.020.213 |
| Assembly Type | 2 HL 290 Hydrostatic Drive (Complete Unit) |
| OEM Reference | ZF 4143.020.213 |
| Material | High-tensile cast iron housing with hardened steel internals |
| Dry Weight (approx.) | 38.5 kg (84.9 lbs) |
| Overall Length | 410 mm |
| Overall Width | 290 mm |
| Overall Height | 310 mm |
| Max Operating Pressure | 420 bar (6,090 psi) |
| Mounting Bolt Pattern | 4-bolt SAE A (compatible with ZF HL series) |
Compatibility
This hydrostatic drive assembly is engineered for the ZF HL 100 Series and HL 270 Series transmission families. It directly replaces units in the following models: WG180, WG200, WG210, and WG220. It also fits select variants of the 2 HL 290 and 2 HL 270 drivelines used in compact construction equipment. Always verify the existing 0631329135: SPRING PIN orientation and housing alignment before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101043 | HOUSING | Encloses the hydrostatic drive assembly and supports input shaft |
| 4143301055 | HOUSING | Opposite-side housing providing bearing support and oil galleries |
| 4143298040 | CASE | Main structural case that houses the planetary gear set |
| 0631329135 | SPRING PIN | Secures control linkage alignment within the drive assembly |
| 0501214034 | SEALING CAP | Prevents debris ingress into the hydrostatic unit ports |
| 0636101024 | CAP SCREW | High-strength fastener for mounting the drive assembly |
| 4475280099 | SCREW PLUG | Seals hydraulic test ports on the drive housing |
| 0634303266 | O-RING | Provides leak-proof seal between housing halves |
| 4143301045 | SCREEN SHEET | Filters return oil before it enters the hydrostatic circuit |
| 0636420051 | COUNTERSUNK SCREW | Flush-mount fastener for securing the screen sheet |
