Overview
The ZF 4644.124.012 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 200 Series transmission family. This PTO unit provides a direct mechanical power interface, enabling auxiliary equipment such as hydraulic pumps or compressors to draw rotational energy directly from the transmission’s gear train. Designed for heavy-duty industrial applications, the 4644.124.012 ensures reliable torque transfer while maintaining the structural integrity of the driveline. This SKU is precision-machined to ZF’s exacting tolerances, guaranteeing seamless integration with the transmission housing and output assembly. When installed alongside the 4644105413: DISCONNECTION mechanism, it forms a robust power take-off system that minimizes parasitic losses and extends service intervals.
Symptoms of Failure
When the ZF 4644.124.012 POWER TAKE-OFF begins to wear, operators may notice several distinct failure indicators. Oil seepage around the PTO mounting flange is a common early sign, often caused by degraded sealing rings or housing fatigue. Intermittent gear slipping under load can occur when the internal splines or engagement teeth lose their hardened surface, leading to reduced torque transmission. Unusual whining or grinding noises during PTO engagement typically signal bearing wear or misalignment within the unit. Additionally, vibration through the transmission casing during auxiliary operation may indicate that the PTO shaft is no longer concentric with the 4642303093: OUTPUT FLANGE, requiring immediate inspection to prevent cascading damage to the 4644101040: TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.124.012 |
| OEM Reference | ZF WG200 Series |
| Material | Case-hardened alloy steel (shaft); aluminum housing |
| Weight | 4.2 kg (9.3 lbs) |
| Overall Length | 185 mm |
| Flange Diameter | 120 mm |
| Mounting Bolt Pattern | 6x M10 on 95 mm PCD |
| Max Torque Capacity | 450 Nm |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This ZF 4644.124.012 POWER TAKE-OFF is primarily designed for the WG 200 Series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with select ZF Ecomat and Ecolife variants that share the same PTO mounting interface. For proper installation, ensure the mating 0636021010: HEXAGON SCREW kit is used to secure the unit to the transmission housing. Always verify the output flange configuration against your specific transmission model to avoid interference with the internal gear train.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Engages/disengages PTO from transmission output |
| 4642303093 | OUTPUT FLANGE | Connects PTO shaft to driveline or pump |
| 0636021010 | HEXAGON SCREW | Secures PTO to transmission housing |
| 4644101040 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301197 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification label for transmission specs |
| 0631311009 | GROOVED STUD | Alignment dowel for PTO mounting |
| 0636015073 | HEXAGON SCREW | Fastener for output flange retention |
| 0634801250 | SEALING RING | Prevents oil leakage at PTO interface |
| 0636305026 | SCREW PLUG | Closes unused PTO port openings |
