Overview
The ZF 4644.124.019 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 200 Series transmission family. This unit serves as the primary power extraction point, allowing auxiliary systems such as hydraulic pumps, compressors, or generators to draw mechanical energy directly from the transmission’s gear train. Positioned on the side of the main casing, the PTO engages via a sliding gear mechanism, ensuring seamless torque transfer without interrupting the driveline. The SKU 4644.124.019 is manufactured to ZF’s exacting tolerances, guaranteeing a precise fit and long service life in demanding industrial applications.
Symptoms of Failure
When the ZF 4644.124.019 POWER TAKE-OFF begins to wear, operators may notice several distinct failure indicators. Oil seepage around the PTO housing is a common early sign, often caused by degraded shaft seals or a compromised gasket. Grinding or whining noises during engagement suggest worn gear teeth or bearing fatigue inside the unit. Intermittent power loss to auxiliary equipment points to a slipping clutch or damaged shift fork, while difficulty engaging or disengaging the PTO typically indicates internal corrosion or a misaligned actuation mechanism. Addressing these symptoms promptly prevents secondary damage to the transmission housing and connected hydraulic systems.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4644.124.019 |
| Material | High-strength alloy steel (case-hardened) |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Overall Length | 245 mm |
| Flange Diameter | 130 mm |
| Input Spline Count | 14-tooth, SAE B |
| Max Torque Capacity | 650 Nm |
| Operating Temperature Range | -20°C to +120°C |
| Seal Type | Viton dual-lip |
Compatibility
This POWER TAKE-OFF is designed primarily for the ZF WG 200 Series transmissions, including the WG180, WG200, and WG210 variants. It is also compatible with select ZF off-highway and marine gearboxes that share the same SAE B mounting pattern and spline configuration. For proper installation, ensure the transmission’s TRANSMISSION HOUSING is clean and free of debris. The unit integrates directly with the DISCONNECTION mechanism and the OUTPUT FLANGE assembly. Secure the PTO using the specified HEXAGON SCREW fasteners to maintain proper clamping force and prevent vibration loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105424 | DISCONNECTION | Engages/disengages PTO from transmission |
| 4644303538 | OUTPUT FLANGE | Connects PTO to auxiliary drive shaft |
| 0636021036 | HEXAGON SCREW | Fastens PTO to transmission housing |
| 4644101224 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301346 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification label for transmission model |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and PTO engagement |
| 4644306500 | COVER PLATE | Seals PTO opening when unit is removed |
| 4644159311 | SHIFT SYSTEM | Alternative shift mechanism for PTO |
| 4644306563 | VALVE BLOCK | Hydraulic control for PTO clutch pack |
