Overview
The ZF 4616.000.201 4 WG 65 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the clutch packs, planetary gear sets, and hydraulic control system into a single, factory-balanced assembly. As the central power transfer component in the WG 65 Series, it converts engine torque into controlled, multi-speed output for wheel loaders, graders, and industrial vehicles. The SKU 4616.000.201 identifies this specific complete assembly, ensuring direct replacement without the need for sub-component matching. During installation, the assembly must be mated to a TRANSMISSION HOUSING to enclose the rotating elements and support the output shaft.
Symptoms of Failure
When the ZF 4616.000.201 assembly begins to fail, operators typically notice these specific warning signs:
- Delayed or harsh engagement: A noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring clunk, indicating worn clutch discs or degraded hydraulic pressure.
- Gear slipping under load: The transmission unexpectedly loses power during acceleration or climbing, with engine RPM rising but vehicle speed dropping—a classic sign of internal seal or piston failure.
- External oil leaks at the housing seam: Hydraulic fluid weeping from the joint between the assembly and the TRANSMISSION HOUSING, often caused by a compromised gasket or cracked casing.
- Unusual whining or grinding noises: High-pitched metallic sounds from the gear train, typically pointing to bearing wear or contamination in the oil circuit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.000.201 |
| Assembly Type | Complete Powershift Unit (4 WG 65) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF 4616.000.201 |
| Torque Capacity (max) | 650 Nm |
| Oil Capacity | 12.5 liters |
Compatibility
This complete unit is engineered specifically for the ZF WG 65 Series of powershift transmissions. It is a direct fit for models including the WG65, WG80, WG100, and WG120 variants commonly found in compact and mid-size construction equipment. The assembly is also backward-compatible with certain WG180 and WG200 configurations when used with the correct adapter plate and HEXAGON SCREW kit. Always verify your transmission serial number before ordering. For secure mounting, use the specified HEXAGON SCREW and HEXAGON SCREW fasteners to attach the assembly to the vehicle frame.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101087 | TRANSMISSION HOUSING | Encloses and supports the gear assembly |
| 0636011038 | HEXAGON SCREW | Fastens housing to assembly |
| 0636011118 | HEXAGON SCREW | Secures cover plate |
| 0636016015 | HEXAGON SCREW | Mounts assembly to frame |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves |
| 0634313118 | O-RING | Seals hydraulic passages |
| 0636304019 | SCREW PLUG | Closes oil drain port |
| 0634801152 | SEALING RING | Prevents fluid leaks |
| 0732611049 | FILTER INSERT | Cleans hydraulic oil |
| 0634303718 | O-RING | Seals filter housing |
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