Overview
The ZF 4644.154.047 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 200 Series transmission family. This unit serves as the mechanical interface that diverts engine torque to auxiliary hydraulic systems, such as dump truck hoists, concrete mixer drums, or refuse packer bodies. Positioned on the side of the transmission housing, the PTO engages directly with the gear train to provide a reliable power source without interrupting the main driveline. The SKU 4644.154.047 is manufactured to ZF’s exacting tolerances, ensuring seamless integration and long service life in demanding vocational applications.
Symptoms of Failure
When the ZF 4644.154.047 POWER TAKE-OFF begins to wear, operators may notice several distinct failure indicators. Oil leaks at the PTO mounting flange are a common early sign, often caused by a degraded seal or gasket between the unit and the transmission housing. Intermittent gear slipping or failure to engage the auxiliary pump can occur when internal shift forks or clutches wear beyond specification. Unusual grinding or whining noises during PTO activation typically indicate bearing fatigue or gear tooth damage. Finally, erratic hydraulic system performance—such as slow hoist operation or inconsistent mixer drum speed—often points to a failing PTO that cannot maintain consistent output torque.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4644.154.047 |
| Product Type | Power Take-Off (PTO) |
| Compatible Transmission Series | WG 200 Series |
| Housing Material | High-Strength Aluminum Alloy |
| Weight | Approx. 12.5 kg (27.6 lbs) |
| Mounting Interface | SAE Standard Bolt Pattern |
| Maximum Input Torque | 600 Nm (442 ft-lbs) |
| Operating Temperature Range | -20°C to +120°C (-4°F to +248°F) |
Compatibility
This OEM genuine PTO is primarily designed for the ZF WG 200 Series transmissions, including models such as the WG180, WG200, and WG210. It is also compatible with select variants of the ZF Ecomat and ZF Ecolife series that share the same PTO drive gear geometry. For proper fitment, verify that your transmission housing is equipped with the correct mounting pad. The 4644.154.047 unit integrates directly with the TRANSMISSION HOUSING (4644101232) and the TRANSMISSION HOUSING (4644301282) to ensure a leak-free seal. During installation, always replace the SCREW PLUG (4475280043) and the O-RING (0634306198) to maintain proper oil retention and system pressure.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101232 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301282 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 4475280043 | SCREW PLUG | Seals oil passages in the housing |
| 0634306198 | O-RING | Provides leak-proof seal at PTO interface |
| 0730365067 | TYPE PLATE | Identification label for transmission model |
| 4644301298 | COVER PLATE | Protects internal components from debris |
| 4644106301 | SHIFT SYSTEM | Controls gear engagement for PTO |
| 4644306507 | COVER PLATE | Secondary cover for access port |
| 4644159302 | SHIFT SYSTEM | Alternate shift mechanism variant |
| 4644306560 | VALVE BLOCK | Hydraulic control for PTO operation |
