Overview
The ZF 4616.102.406 INPUT for WG65 is a precision-machined component that serves as the primary torque-transfer interface between the engine and the transmission’s planetary gearset. Positioned at the front of the WG 65 Series housing, this OEM genuine part ensures correct alignment of the input shaft and distributes rotational force evenly across the clutch packs. The SKU 4616.102.406 is engineered to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty off-highway applications. When installed alongside a TRANSMISSION HOUSING, this input component maintains the structural integrity required for sustained high-torque operations.
Symptoms of Failure
- Delayed engagement or gear slipping under load — A worn 4616.102.406 input can cause the transmission to hesitate before engaging forward or reverse, particularly when the vehicle is carrying a full payload. This symptom often leads operators to search for “WG65 transmission slipping when loaded.”
- Metallic debris in the oil pan — As the input splines degrade, fine metal particles contaminate the hydraulic fluid. Technicians frequently report “metal shavings in ZF transmission oil” as a key indicator of input failure.
- Abnormal vibration at the bell housing — Misalignment from a damaged input creates low-frequency shaking that intensifies during acceleration. This is commonly described as “ZF WG65 vibration at takeoff.”
- Oil weeping from the front seal area — Excessive play in the input component compromises the sealing surface, leading to fluid loss. This matches long-tail queries like “front seal leak ZF WG65 transmission.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.102.406 |
| Material | Case-hardened alloy steel (16MnCr5 equivalent) |
| Overall Length | 185 mm |
| Spline Major Diameter | 42 mm |
| Weight | 2.3 kg |
| OEM Reference | ZF 4616.102.406 (Genuine) |
| Surface Finish | Black oxide coating |
Compatibility
This input component is specifically designed for the ZF WG 65 Series, but it also fits select models in the WG180 and WG200 families when used with the correct adapter housing. The 4616.102.406 is a direct replacement in WG65 transmissions found in forklifts, telehandlers, and mobile cranes. For proper installation, secure the input using a HEXAGON SCREW (0636011038) and a HEXAGON SCREW (0636011118) at the flange, plus a HEXAGON SCREW (0636016015) for the bearing retainer. Always verify your transmission’s serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports the input shaft and planetary assembly |
| 0636011038 | HEXAGON SCREW | Secures the input flange to the housing |
| 0636011118 | HEXAGON SCREW | Fastens the bearing cover to the input assembly |
| 0636016015 | HEXAGON SCREW | Locks the input bearing retainer in place |
| 0631306085 | CYLINDRICAL PIN | Aligns the input shaft to the housing dowel holes |
| 0634313118 | O-RING | Seals the input shaft bore against oil leakage |
| 0636304019 | SCREW PLUG | Closes the pressure tap port on the input housing |
| 0634801152 | SEALING RING | Prevents fluid bypass at the input shaft seal |
| 0732611049 | FILTER INSERT | Traps debris from the input wear particles |
| 0634303718 | O-RING | Seals the filter housing to the input circuit |
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