Overview
The ZF 4616.000.228 4 WG 65 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty off-highway machinery. This assembly serves as the central power distribution hub within the WG 65 series, managing torque flow from the engine to the driveline through four forward and reverse hydraulic clutches. As a complete unit, SKU 4616.000.228 eliminates the need for piecemeal rebuilding, providing a direct replacement for worn-out transmissions in loaders, graders, and industrial tractors. It integrates seamlessly with the 4616101116: TRANSMISSION HOUSING to form the structural backbone of the drivetrain.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs wear, the transmission may hesitate or fail to hold gear during high-torque operations, a common issue with aging WG 65 units.
- External oil leaks near the bell housing or PTO ports: Degraded seals and gaskets cause hydraulic fluid to weep, often traced to the interface between the assembly and the 4616301307: HOUSING or the 4616301309: HOUSING.
- Delayed or harsh shifting: A failing valve body or worn spools within the assembly produce noticeable lag or jarring shifts, reducing operator control and increasing driveline stress.
- Overheating transmission fluid: Internal leakage or clutch slippage generates excessive heat, often accompanied by a burnt odor and degraded shift quality.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4616.000.228 |
| Series | WG 65 (4 WG 65) |
| Assembly Type | Complete Powershift Unit |
| Estimated Weight | 185 kg (408 lbs) |
| Housing Material | High-Grade Cast Iron |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Clutch Configuration | 4 Forward / 4 Reverse |
| OEM Reference | ZF 4 WG 65 |
Compatibility
This complete assembly is specifically designed for the ZF WG 65 series of powershift transmissions. It is a direct fit for models including the WG65, WG120, WG150, WG180, and WG200, which are commonly deployed in articulated dump trucks, wheel loaders, and telescopic handlers. The unit also shares mounting interfaces with the 0636011118: HEXAGON SCREW used to secure the assembly to the engine flywheel housing. Always verify your transmission model tag before ordering to ensure correct spline and bell housing alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 0636011118 | HEXAGON SCREW | Fastener for housing-to-engine mounting |
| 4616301307 | HOUSING | Rear cover housing for output shaft support |
| 4616301309 | HOUSING | Intermediate housing for clutch pack retention |
| 0636011038 | HEXAGON SCREW | Bolt for securing valve body cover |
| 0636016015 | HEXAGON SCREW | High-tensile fastener for PTO adapter |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Hydraulic seal between clutch drum and shaft |
| 0636304019 | SCREW PLUG | Port plug for pressure test points |
| 0634801152 | SEALING RING | Static seal for oil pan interface |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
