Overview
The ZF 4616.000.220 4 WG 65 Powershift Transmission Assembly | Complete Unit is a fully assembled drop-in replacement designed for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control valving within a single robust assembly. As a core component of the WG 65 Series, the SKU 4616.000.220 serves as the primary power transfer module, converting engine torque into controlled wheel or implement motion. It mounts directly to the engine bell housing and interfaces with the driveline via the output flange. For proper installation, this unit must be secured using a 0636011118: HEXAGON SCREW set to ensure correct clamping force on the mating surfaces.
Symptoms of Failure
- Delayed or harsh engagement: When the internal clutch packs wear, operators experience a noticeable lag between shifting and actual gear engagement, often accompanied by a jarring “clunk.” This is a primary indicator that the complete unit requires replacement.
- Internal hydraulic pressure loss: A failing assembly will cause erratic shifting or complete loss of forward/reverse motion due to internal seal degradation. This symptom often presents as the machine “creeping” unexpectedly.
- Contaminated transmission fluid: Metallic particles or dark, burnt-smelling oil in the sump indicate internal friction material shedding from the clutches. This is a definitive sign that the 4616.000.220 assembly has suffered catastrophic wear.
- External oil seepage at mating joints: Leaks developing between the main housing and the auxiliary housings suggest structural fatigue. This often requires replacing the 4616101101: TRANSMISSION HOUSING alongside the main unit.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4616.000.220 |
| Series | WG 65 (4 WG 65) |
| Type | Powershift Transmission Assembly (Complete Unit) |
| Estimated Dry Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | High-Grade Cast Iron / Alloy Steel |
| Input Spline Count | 14-tooth (SAE standard) |
| Output Flange Type | SAE C (4-bolt pattern) |
| Related Housing | 4616301304: HOUSING / 4616301309: HOUSING |
Compatibility
This 4 WG 65 complete unit is specifically engineered for the ZF WG 65 Series powershift transmissions. It is directly compatible with the following ZF transmission models: WG180, WG200, and WG220. These transmissions are commonly found in telehandlers, wheel loaders, and industrial forklifts from manufacturers such as JCB, Manitou, and Linde. The assembly is also a direct fit for the 4WG-65 variant used in certain agricultural tractors. Always verify the bell housing pattern; the 0636011118: HEXAGON SCREW and 0636011038: HEXAGON SCREW are required for mounting the auxiliary housings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101101 | TRANSMISSION HOUSING | Main structural casing for gear support |
| 0636011118 | HEXAGON SCREW | Fastener for housing-to-bell housing joint |
| 4616301304 | HOUSING | Rear auxiliary housing for PTO drive |
| 4616301309 | HOUSING | Front auxiliary housing for clutch pack |
| 0630361069 | SEALING CAP | Seals hydraulic pressure ports |
| 0636011038 | HEXAGON SCREW | Fastener for valve body attachment |
| 0636016015 | HEXAGON SCREW | Fastener for oil pan mounting |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0634313118 | O-RING | Seal between housing sections |
| 0636304019 | SCREW PLUG | Drain/fill port closure |
