Overview
The ZF 4616.000.195 4 WG 65 Powershift Transmission Assembly is a complete, factory-sealed unit designed for heavy-duty off-highway applications. This assembly serves as the primary power transfer module within the WG 65 series, integrating the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. As a full replacement assembly, SKU 4616.000.195 eliminates the need for piecemeal rebuilding, ensuring optimal clutch pack engagement and shift timing for wheel loaders, graders, and industrial tractors. It sits at the core of the drivetrain, directly coupling engine output to the OUTPUT shaft and the OUTPUT FLANGE, while being housed within the TRANSMISSION HOUSING.
Symptoms of Failure
- Delayed or harsh shifting between forward and reverse gears: Worn clutch discs or degraded seals within the assembly cause erratic engagement, often accompanied by a noticeable shudder during direction changes.
- Internal oil leaks pooling near the bell housing: Cracks in the transmission housing or failed O-rings allow hydraulic fluid to escape, leading to low pressure and eventual gear slippage under load.
- Loss of power transfer in higher speed ranges: A failing torque converter stator or worn planetary bearings result in the engine revving without proportional vehicle movement, particularly in 3rd and 4th gears.
- Metallic grinding noise during clutch pack engagement: Contaminated fluid or broken friction plates produce audible grinding, often accompanied by a burnt oil smell from degraded friction material.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.000.195 |
| Assembly Type | Complete Powershift Transmission |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 480 mm |
| Housing Material | High-grade cast iron |
| OEM Reference | ZF 4 WG 65 |
| Torque Converter Diameter | 365 mm |
| Mounting Bolt Torque | 180 Nm (using HEXAGON SCREW 0636011038) |
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 WG 65, WG 65 II, and WG 65 III, commonly found in Volvo L70 and L90 wheel loaders, as well as Case 821 and 921 machines. While primarily designed for the WG 65 platform, the assembly shares mounting patterns with the WG 180 and WG 200 series, though hydraulic pressure ratings differ. Always verify bell housing alignment and output flange spline count before installation. The assembly integrates with the TRANSMISSION HOUSING and requires the use of HEXAGON SCREW fasteners for secure mounting.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105415 | OUTPUT | Transfers torque from transmission to driveshaft |
| 4616303144 | OUTPUT FLANGE | Connects output shaft to universal joint |
| 4616101094 | TRANSMISSION HOUSING | Encloses and supports all internal components |
| 0636011038 | HEXAGON SCREW | M10 fastener for housing assembly |
| 0636011118 | HEXAGON SCREW | M12 fastener for flange mounting |
| 0636016015 | HEXAGON SCREW | M16 fastener for heavy-duty brackets |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Seals oil passage between housing sections |
| 0732611049 | FILTER INSERT | Hydraulic oil filtration element |
| 0634303718 | O-RING | Seals filter housing to transmission |
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