Overview
The ZF 4168.030.110 CONVERTER Torque Converter Assembly is a critical hydraulic coupling unit positioned between the engine flywheel and the transmission input shaft within the WG 150 Series gearbox. This complete unit transfers engine torque to the planetary gears via fluid coupling, multiplying torque during low-speed operation while providing smooth power delivery. The SKU 4168.030.110 is a direct-fit replacement assembly designed to restore full driveline efficiency in heavy-duty industrial applications.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration — worn internal clutch friction material causes uneven lockup engagement, leading to noticeable shuddering under load.
- Transmission fluid overheating with gear slipping — a failing stator or damaged impeller vanes reduce hydraulic pressure, causing excessive heat buildup and delayed gear engagement.
- Oil leaks from the converter hub seal area — degraded seals around the 4168.030.110 unit allow ATF to escape, leaving puddles under the bell housing and reducing fluid levels.
- Whining or grinding noise from the bell housing — worn needle bearings or cracked turbine fins produce metallic sounds that intensify with engine RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4168.030.110 |
| Assembly Type | Complete Torque Converter (Lockup) |
| Overall Diameter | ~340 mm (13.4 in) |
| Mounting Bolt Pattern | 6-bolt, 180 mm PCD |
| Weight | ~18.5 kg (40.8 lbs) |
| Housing Material | Cast Steel with Friction-Lined Clutch |
| OEM Reference | ZF 4168.030.110 |
| Fluid Capacity | ~2.8 liters ATF |
Compatibility
This torque converter assembly is engineered for the ZF WG 150 Series transmission family. It is compatible with the following ZF models: WG 150, WG 180, WG 200, and WG 250 series gearboxes used in forklifts, wheel loaders, and industrial tractors. Always verify the bell housing bolt pattern and pilot bore dimensions before installation.
When replacing the 4168.030.110, it is recommended to inspect the TRANSMISSION HOUSING (4642101109) and TRANSMISSION HOUSING (4642301205) for cracks or wear. Additionally, the TYPE PLATE (0730365125) should be checked for correct identification, and the GROOVED STUD (0631311009) must be torqued to specification during reassembly to prevent misalignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses gear train and supports converter |
| 4642301205 | TRANSMISSION HOUSING | Alternative housing variant for WG series |
| 0730365125 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for housing assembly |
| 4642301168 | SCREEN SHEET | Filter mesh for oil sump pickup |
| 4642301169 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | Fastener for converter housing bolts |
| 4642301186 | SCREEN SHEET | Fine mesh screen for valve body protection |
| 4644106231 | SHIFT SYSTEM | Hydraulic control unit for gear selection |
| 4644306470 | GASKET | Seal between converter housing and transmission |
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