Overview
The ZF 4642.306.122 CONNECTING SOCKET is a precision-engineered hydraulic interface component designed for the WG180 and WG65 transmission series. This OEM genuine part serves as the critical junction between the transmission housing and the external hydraulic lines, ensuring secure fluid transfer for clutch actuation and lubrication circuits. The SKU 4642.306.122 is manufactured to ZF’s exacting tolerances, providing a leak-proof seal under high-pressure operating conditions. When installed correctly, this connecting socket maintains the structural integrity of the hydraulic system, preventing contamination ingress and pressure loss that could compromise gear engagement.
Symptoms of Failure
- Hydraulic fluid seepage at the transmission housing interface – A worn 4642.306.122 socket often causes visible oil drips or wet spots around the connection point, leading to low fluid levels and potential gearbox overheating.
- Erratic gear engagement or delayed shifting – When the connecting socket loses its sealing capability, hydraulic pressure drops, resulting in sluggish clutch pack activation and inconsistent shift timing.
- Contaminated transmission fluid – A cracked or deformed socket allows dirt and moisture to enter the hydraulic circuit, causing premature wear of internal components like the FILTER INSERT.
- Audible hydraulic whine during operation – Air ingestion through a failing socket creates cavitation noise, indicating reduced lubrication to bearings and planetary gears.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4642.306.122 |
| Material | High-tensile steel with zinc-nickel plating |
| Overall Length | 68 mm |
| Thread Size | M22 x 1.5 |
| Hex Flange Width | 27 mm |
| Weight | 0.14 kg |
| OEM Reference | ZF 4642.306.122 |
| Sealing Surface | Conical 60° with integrated O-ring groove |
Compatibility
This connecting socket is engineered for the ZF WG180 and WG65 series powershift transmissions, commonly found in heavy-duty construction equipment and agricultural machinery. It is also compatible with the WG200 series when used with the appropriate HEXAGON SCREW (M10 x 30) for mounting. The 4642.306.122 interfaces directly with the TRANSMISSION HOUSING, requiring two HEXAGON SCREW (M12 x 35) fasteners and one HEXAGON SCREW (M14 x 40) for secure attachment. Always verify your transmission model’s parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101065 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 0636011038 | HEXAGON SCREW | M10 fastener for socket mounting |
| 0636011118 | HEXAGON SCREW | M12 fastener for housing attachment |
| 0636016015 | HEXAGON SCREW | M14 fastener for high-torque connections |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0634313118 | O-RING | Static seal for socket-to-housing interface |
| 0636304019 | SCREW PLUG | Port closure for pressure testing |
| 0634801152 | SEALING RING | Copper washer for threaded connections |
| 0732611049 | FILTER INSERT | Hydraulic oil filtration element |
| 0634303718 | O-RING | Dynamic seal for hydraulic line connection |
