Overview
The ZF 4168.028.652 CONVERTER Torque Converter Assembly is a complete, drop-in replacement unit designed to transfer and multiply engine torque within the ZF WG series powershift transmission. Positioned between the engine flywheel and the transmission input shaft, this hydraulic coupling uses stator, turbine, and impeller components to smooth power delivery and provide torque multiplication during low-speed operation. The SKU 4168.028.652 is a fully assembled converter, eliminating the need for disassembly or core balancing. When installed, it interfaces directly with the 4661101001: TRANSMISSION HOUSING and the 4661301007: HOUSING, ensuring precise alignment and oil flow routing.
Symptoms of Failure
- Shudder or vibration during acceleration: A worn torque converter clutch or damaged stator can cause noticeable shuddering, especially when the converter locks up at highway speeds.
- Delayed or harsh engagement: If the converter fails to build hydraulic pressure properly, you may experience a significant lag between shifting into gear and actual movement, or a jarring engagement.
- Transmission fluid overheating: Internal slippage from a failing converter generates excessive heat, often indicated by a rising temperature gauge or burnt-smelling fluid.
- Stall speed deviation: An engine that revs higher or lower than the specified stall speed during a stall test points directly to converter wear or internal damage.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4168.028.652 |
| Assembly Type | Complete Torque Converter Unit |
| Estimated Outer Diameter | 380 mm (14.96 in) |
| Estimated Weight | 28 kg (61.7 lbs) |
| Primary Material | Cast Steel Housing with Hardened Turbine |
| OEM Reference | ZF 4168.028.652 |
| Fluid Type | ZF TE-ML 03 or equivalent ATF |
Compatibility
This torque converter assembly is engineered for ZF WG series transmissions, specifically the WG 90 Series and WG 94 Series. It is a direct fit for models including the WG180, WG200, and WG210, commonly found in heavy-duty construction equipment, agricultural tractors, and industrial material handlers. For proper installation, ensure the 4661301093: TUBE is correctly seated to supply lubrication oil, and that the 0631306174: CYLINDRICAL PIN is used to align the converter to the flywheel. Always verify your transmission model’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101001 | TRANSMISSION HOUSING | Main structural case enclosing gears and shafts |
| 4661301007 | HOUSING | Converter housing cover for oil containment |
| 4661301093 | TUBE | Lubrication oil supply tube to converter |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for converter-to-flywheel mounting |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Sealing plug for oil drain or test ports |
| 0636302602 | SCREW PLUG | Magnetic drain plug for debris collection |
| 0634100633 | O-RING | Seal between converter and housing |
| 4661301029 | NOZZLE | Oil spray nozzle for gear lubrication |
| 4661301027 | NOZZLE | Secondary oil spray nozzle for clutch cooling |
