Overview
The ZF 4644.124.408 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 201 Series transmission family. This unit interfaces directly with the transmission housing to transfer engine torque to auxiliary hydraulic systems, such as dump truck pumps or concrete mixer drives. As a bolt-on assembly, it sits on the side of the transmission case and engages via a sliding gear mechanism. The SKU 4644.124.408 ensures exact fitment and factory-level performance, eliminating the guesswork associated with aftermarket substitutes. When installed alongside the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING, this PTO provides reliable power take-off for demanding vocational applications.
Symptoms of Failure
When the ZF 4644.124.408 PTO begins to wear, operators will notice distinct operational issues. Oil leaks around the PTO mounting flange are a primary indicator, often caused by a degraded seal or housing crack. Gear slipping or intermittent engagement occurs when the internal shift fork or sliding gear loses tolerance, leading to power loss under load. Unusual grinding or whining noises during PTO activation signal bearing wear or gear tooth damage. Finally, difficulty engaging or disengaging the PTO suggests a failing shift mechanism or contamination in the hydraulic circuit. Addressing these symptoms early prevents secondary damage to the 4644301189: THREADED BUSH and the 4475280043: SCREW PLUG.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4644.124.408 |
| Weight | ~4.2 kg (9.3 lbs) |
| Housing Material | High-grade cast iron (GGG-40) |
| Input Torque Capacity | 600 Nm (442 lb-ft) |
| Output Flange | SAE B 2-bolt (standard) |
| Gear Ratio | 1:1 direct drive |
| Operating Temperature Range | -20°C to +120°C |
| Seal Type | Viton dual-lip |
Compatibility
This genuine ZF PTO is designed for the WG 201 Series transmission family, including models such as the WG180, WG200, and WG210. It is also compatible with select WG 151 and WG 160 variants that share the same PTO mounting interface. Always verify the transmission serial number and housing configuration before ordering. The part integrates with the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING to ensure correct alignment and oil flow.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4644301189 | THREADED BUSH | Mounting insert for PTO bolts |
| 4475280043 | SCREW PLUG | Seals oil passages in housing |
| 0634306198 | O-RING | Seals PTO-to-housing interface |
| 0730365067 | TYPE PLATE | Identification tag for transmission |
| 4644301161 | COVER PLATE | Protects PTO opening when not in use |
| 0636100621 | HEXAGON SCREW | Fastener for housing assembly |
| 0631610020 | SET SCREW | Adjustment screw for shift mechanism |
| 0501218540 | BREATHER | Vents pressure from transmission case |
