Overview
The ZF 4166.037.073 CONVERTER Torque Converter Assembly is a critical hydraulic coupling unit that transfers engine torque to the transmission input shaft while multiplying rotational force during launch. Positioned between the engine flywheel and the transmission pump, this complete unit houses the impeller, turbine, stator, and lock-up clutch within a sealed housing. The SKU 4166.037.073 is engineered specifically for ZF’s WG series powershift transmissions, ensuring precise fluid coupling and smooth power delivery under heavy industrial loads. When replacing this assembly, always inspect and replace the 0636115293: 螺栓 and 0736300232: 螺栓 that secure the converter housing to the bellhousing, as these fasteners are prone to fatigue.
Symptoms of Failure
- Transmission shudder or vibration during acceleration: A worn torque converter stator clutch or damaged turbine fins causes inconsistent fluid flow, leading to noticeable shaking between 20-40 km/h under load.
- Delayed engagement or “slipping” in forward gears: When the converter fails to maintain hydraulic pressure, operators experience a lag of 2-3 seconds before the machine moves, often accompanied by elevated engine RPM without corresponding wheel speed.
- Dark, burnt transmission fluid with metallic particles: Internal wear of the converter’s needle bearings or lock-up clutch lining contaminates the oil, producing a distinct burnt odor and visible debris on the dipstick.
- Overheating during low-speed operation: A seized stator one-way clutch prevents proper torque multiplication, causing the transmission to run 20-30°C above normal operating temperature in stop-and-go applications.
Technical Specifications
| Part Number | 4166.037.073 |
| Type | Complete Torque Converter Assembly (Lock-up Clutch Equipped) |
| Outer Diameter | 385 mm (15.16 in) |
| Overall Length | 215 mm (8.46 in) |
| Pilot Diameter | 55 mm (2.17 in) |
| Weight | 28.5 kg (62.8 lbs) |
| Housing Material | Cast Aluminum Alloy (A356-T6) |
| Impeller Blades | 29 (Heat-Treated Steel) |
| OEM Reference | ZF 4166.037.073 / 4166 037 073 |
| Torque Capacity | 1,200 Nm (885 lb-ft) Max |
| Seal Kit Required | 0634316523: O-RING (Input Shaft Seal) |
Compatibility
This torque converter assembly is designed for ZF’s WG 260, WG 261, WG 310, and WG 311 series powershift transmissions commonly found in wheel loaders, forklifts, and telehandlers. It is also compatible with the WG 180 and WG 200 series when used with the appropriate adapter plate. The 4166.037.073 unit directly replaces the earlier 4166.037.071 and 4166.037.072 variants. During installation, ensure the 4475280208: SCREW PLUG is torqued to 45 Nm to prevent fluid bypass. Always verify bellhousing bolt pattern compatibility with your specific transmission model before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Converter housing-to-bellhousing bolt (M12x1.5, 8.8 grade) |
| 0736300232 | 螺栓 | Flywheel-to-converter mounting bolt (M10x1.25) |
| 4475280208 | SCREW PLUG | Converter drain plug with copper washer (M18x1.5) |
| 0634316523 | O-RING | Input shaft seal ring (35mm ID x 3mm cross-section) |
| 0630361026 | SEALING CAP | Converter test port cap (plastic, snap-fit) |
| 0501214611 | 齿轮泵 | Transmission charge pump (supplies converter feed pressure) |
| 0634313945 | O形圈 | Converter-to-pump seal (45mm ID x 2.5mm) |
| 0501322532 | TEMPERATURE SENSOR | Converter outlet oil temperature probe (NTC type) |
| 0634313366 | O-RING | Converter cover seal (55mm ID x 3.5mm) |
| 4644301014 | 挡油盘 | Oil baffle plate (directs flow to turbine hub) |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
