Overview
The ZF 4644.124.011 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 201 Series transmission. This unit serves as the mechanical interface that transfers engine torque to auxiliary hydraulic systems, such as pumps for dump bodies, cranes, or refuse equipment. Mounted directly to the transmission housing, the PTO engages via a pneumatic or mechanical shift mechanism, ensuring reliable power delivery without compromising driveline integrity. The SKU 4644.124.011 is precision-machined to ZF’s exacting tolerances, guaranteeing seamless integration with the WG201 gear train. For optimal assembly integrity, this PTO works in concert with the 4644101160: TRANSMISSION HOUSING and the 4644301323: TRANSMISSION HOUSING, which provide the structural foundation for the unit.
Symptoms of Failure
When the ZF 4644.124.011 Power Take-Off begins to degrade, operators will notice distinct performance issues. Oil leaks around the PTO mounting flange are the most common early indicator, often caused by a compromised gasket or seal failure. Gear slipping or intermittent engagement occurs when the internal shift fork or clutch hub wears, leading to loss of hydraulic pressure during operation. Unusual grinding or whining noises from the transmission side indicate bearing fatigue or gear tooth damage within the PTO assembly. Finally, inability to disengage the PTO suggests a seized shift mechanism or broken return spring, which can cause parasitic drag and reduced fuel efficiency.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.124.011 |
| OEM Reference | ZF 4644.124.011 |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | Approx. 12.5 kg (27.5 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 160 mm |
| Mounting Type | SAE B or C flange (dependent on application) |
| Torque Capacity | Up to 600 Nm (442 lb-ft) |
| Sealing | Integrated O-ring groove (use 0634306198: O-RING) |
| Identification | Includes 0730365067: TYPE PLATE |
Compatibility
This genuine ZF PTO is primarily designed for the WG 201 Series transmission family, including models such as the WG180, WG200, and WG210. It is also compatible with select ZF Ecomat and Ecolife variants that share the same PTO drive gear geometry. The unit interfaces directly with the 4644301189: THREADED BUSH for secure mounting and the 4475280043: SCREW PLUG for oil port sealing. Always verify the transmission serial number and PTO gear ratio before installation to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301323 | TRANSMISSION HOUSING | Secondary housing for PTO mounting |
| 4644301189 | THREADED BUSH | Provides threaded anchor for PTO bolts |
| 4475280043 | SCREW PLUG | Seals oil passages in the PTO cavity |
| 0634306198 | O-RING | Prevents fluid leaks at flange joint |
| 0730365067 | TYPE PLATE | Identification tag with part number |
| 4644301161 | COVER PLATE | Protects PTO opening when not in use |
| 0636100621 | HEXAGON SCREW | Fastens PTO to transmission housing |
| 0631610020 | SET SCREW | Locks shift mechanism in position |
| 0501218540 | BREATHER | Vents internal pressure from PTO housing |
