Overview
The ZF 4616.000.273 4 WG 65 II(D) Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. As the core power transfer component in the WG 65 Series, it ensures smooth directional shifts and reliable load handling under extreme operating conditions. The SKU 4616.000.273 is a direct replacement for original equipment, offering a drop-in solution for rebuilds or full transmission swaps.
Symptoms of Failure
- Erratic or delayed gear engagement: When the internal clutch packs or hydraulic seals wear, operators experience hesitation or harsh shifts, especially when transitioning from forward to reverse under load.
- Torque converter shudder or overheating: A failing stator or worn lock-up clutch within the assembly causes vibration during acceleration and elevated transmission fluid temperatures.
- External oil seepage from the main housing: Degraded gaskets or cracked casings lead to fluid loss around the bell housing or output flange, often visible as drips after shutdown.
- Loss of power in higher gears: Internal wear in the planetary gear train or a failing 4616105418: VALVE can cause the transmission to slip under heavy torque, reducing machine productivity.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.000.273 |
| Assembly Type | Powershift Transmission, Complete Unit |
| Series | WG 65 (4 WG 65 II(D)) |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4616.000.273 |
| Max Input Torque | 1,200 Nm (estimated) |
| Fluid Capacity | Approx. 18 liters |
Compatibility
This complete unit is specifically engineered for the ZF WG 65 Series, including the 4 WG 65 II(D) variant. It is commonly found in agricultural tractors, wheel loaders, and telescopic handlers from manufacturers such as Case IH, New Holland, and JCB. While the WG 65 is distinct from larger series like WG180 or WG200, the internal hydraulic architecture shares common components. For example, the 0501319251: SOLENOID VALVE used in this assembly is also employed in select WG 200 applications. Always verify bell housing and PTO configurations before installation.
During installation, technicians frequently replace the 0636302013: SCREW PLUG and the 0634801038: SEALING RING to prevent leaks at the drain and fill ports. These small but critical components ensure the assembly maintains proper hydraulic pressure after service.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105418 | VALVE | Controls hydraulic flow to clutch packs |
| 0501319251 | SOLENOID VALVE | Electro-hydraulic shift modulation |
| 0636302013 | SCREW PLUG | Seals fluid drain/fill ports |
| 0634801038 | SEALING RING | Prevents oil leakage at plug interfaces |
| 4616305078 | CONSOLE | Mounting bracket for transmission controls |
| 0636010047 | HEXAGON SCREW | Secures housing flanges |
| 0636101020 | CAP SCREW | Fastens valve body covers |
| 0630001010 | WASHER | Distributes load under fasteners |
| 0637006015 | HEXAGON NUT | Locks bolts on output flange |
| 0501223098 | HOSE PIPE | Transmits hydraulic fluid to cooler |
