Overview
The ZF 4642.153.494 COUPLING is a precision-engineered OEM genuine component designed specifically for the WG 150 Series transmission. This coupling serves as the critical mechanical link between the engine output and the transmission input shaft, ensuring smooth torque transfer and vibration dampening within the driveline. As an integral part of the gearbox assembly, the SKU 4642.153.494 directly interfaces with the TRANSMISSION HOUSING and the TRANSMISSION HOUSING to maintain proper alignment and load distribution. This coupling is manufactured to ZF’s exacting tolerances, guaranteeing a precise fit and long service life in heavy-duty industrial applications.
Symptoms of Failure
When the ZF 4642.153.494 COUPLING begins to wear out, operators may notice several distinct failure indicators. Transmission vibration during acceleration is a common early sign, often caused by spline wear or material fatigue. Oil leaks around the bell housing area can occur if the coupling’s sealing surface degrades, leading to fluid loss and potential contamination. Another symptom is intermittent gear engagement or slipping, particularly under load, which indicates the coupling is no longer transmitting torque efficiently. Finally, abnormal clunking noises during gear changes suggest excessive play in the coupling assembly, requiring immediate inspection to prevent further damage to the TYPE PLATE and surrounding components.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4642.153.494 |
| OEM Reference | ZF WG 150 Series |
| Material | High-strength alloy steel with surface hardening |
| Outer Diameter | Approx. 150 mm |
| Inner Diameter | Approx. 65 mm |
| Overall Length | 95 mm |
| Weight | 2.8 kg |
| Spline Count | 24 internal splines |
| Operating Torque | Up to 1,200 Nm |
| Temperature Range | -40°C to +120°C |
Compatibility
This ZF 4642.153.494 COUPLING is primarily designed for the WG 150 transmission series but is also compatible with several other ZF models that share the same driveline architecture. It fits the WG 180 and WG 200 series transmissions, as well as certain variants of the WG 120 series when used with the appropriate adapter. The coupling works in conjunction with the GROOVED STUD to secure the assembly, and it is commonly found in industrial vehicles such as forklifts, reach stackers, and terminal tractors. Always verify your transmission model and housing configuration before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101117 | TRANSMISSION HOUSING | Encloses and supports internal gear train |
| 4642301217 | TRANSMISSION HOUSING | Secondary housing for auxiliary components |
| 0730365125 | TYPE PLATE | Identification and specification label |
| 0631311009 | GROOVED STUD | Secures coupling to transmission shaft |
| 4642301168 | SCREEN SHEET | Filters debris from transmission fluid |
| 4642301169 | SCREEN SHEET | Secondary fluid filtration element |
| 0636100621 | HEXAGON SCREW | Fastens housing and coupling components |
| 0630361029 | SEALING CAP | Prevents fluid leakage from housing ports |
| 4642306254 | ADAPTER | Converts coupling to different shaft sizes |
| 0634303340 | O-RING | Provides sealing between mating surfaces |
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