Overview
The ZF 4616.302.114 QUILL SHAFT is a precision-machined component designed for the WG 65 Series transmission family. This OEM genuine part functions as the central torque transfer shaft within the clutch pack assembly, ensuring smooth engagement and disengagement of planetary gearsets. The SKU 4616.302.114 is specifically engineered to interface with the 4616101059 TRANSMISSION HOUSING, providing a rigid mounting point for rotating elements. When installed correctly, this quill shaft maintains concentric alignment between the input shaft and the output drum, reducing vibration and extending service life in heavy-duty industrial applications.
Symptoms of Failure
- Delayed gear engagement or slipping under load: A worn quill shaft can cause misalignment, leading to hesitation when shifting between forward and reverse gears in WG65 transmissions.
- Metallic grinding noise during acceleration: Surface wear on the shaft splines produces audible chatter, particularly at low RPM, indicating imminent failure of the torque transfer path.
- Transmission fluid contamination with metal particles: As the shaft surface degrades, microscopic steel fragments enter the hydraulic circuit, often detected during routine oil analysis.
- Intermittent loss of hydraulic pressure: Cracks or fatigue in the quill shaft can disrupt oil flow through the center bore, causing erratic clutch pack operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.302.114 |
| Overall Length | 245 mm ±0.5 mm |
| Outer Diameter | 38 mm |
| Inner Bore Diameter | 12 mm |
| Material | Case-hardened 20MnCr5 steel |
| Surface Hardness | 58-62 HRC |
| Weight | 1.85 kg |
| OEM Reference | ZF 4616.302.114 |
| Fastener Torque Spec | Use 0636011038 HEXAGON SCREW (M10x30) at 45 Nm |
| Secondary Fastener | 0636011118 HEXAGON SCREW (M8x25) at 28 Nm |
| Mounting Bolt | 0636016015 HEXAGON SCREW (M12x40) at 70 Nm |
Compatibility
This quill shaft is engineered for the WG 65 Series transmission platform. It is directly compatible with the following ZF models: WG65, WG80, WG100, WG120, WG150, WG180, and WG200. The part also integrates with auxiliary components such as the 0631306085 CYLINDRICAL PIN for alignment and the 0634313118 O-RING for sealing the hydraulic circuit. Always verify the shaft spline count (typically 24-tooth) against your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports the quill shaft assembly |
| 0636011038 | HEXAGON SCREW | Secures quill shaft to clutch drum |
| 0636011118 | HEXAGON SCREW | Fastens bearing retainer plate |
| 0636016015 | HEXAGON SCREW | Mounts shaft to transmission housing |
| 0631306085 | CYLINDRICAL PIN | Prevents rotational slippage of shaft |
| 0634313118 | O-RING | Seals hydraulic oil passage through shaft |
| 0636304019 | SCREW PLUG | Closes oil gallery access port |
| 0634801152 | SEALING RING | Prevents external oil leakage at shaft exit |
| 0732611049 | FILTER INSERT | Traps debris from shaft wear particles |
| 0634303718 | O-RING | Secondary seal for pressure compensation |
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