Overview
The ZF 4644.155.471 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 200 Series transmission family. This unit transfers engine torque to auxiliary hydraulic systems, such as dump truck hoists, concrete mixer drums, or refuse packer mechanisms. Mounted directly to the transmission housing, the PTO engages via a pneumatic or mechanical shift mechanism. The SKU 4644.155.471 ensures precise gear alignment and oil flow control within the WG200 driveline. When paired with a robust TRANSMISSION HOUSING (4644101222), this power take-off maintains reliable power extraction without compromising main transmission performance.
Symptoms of Failure
- Hydraulic system pressure loss or slow implement response: Worn internal seals or bearings in the 4644.155.471 reduce oil flow, causing sluggish operation of attached equipment.
- Audible gear whine or grinding noise during PTO engagement: Damaged gear teeth or shift fork wear produce distinct metallic sounds, often mistaken for transmission issues.
- External oil leaks around the PTO mounting flange: Degraded gaskets or cracked housing allow transmission fluid to escape, visible as drips beneath the vehicle.
- Intermittent PTO disengagement under load: Worn shift mechanism or broken detent springs cause the PTO to slip out of gear, especially during heavy hydraulic demand.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4644.155.471 |
| OEM Reference | ZF 4644.155.471 (Genuine) |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | 12.4 kg (27.3 lbs) |
| Dimensions (L x W x H) | 210 mm x 180 mm x 160 mm |
| Mounting Type | SAE B or C flange (dependent on application) |
| Max Torque Capacity | 450 Nm (332 ft-lbs) |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This genuine ZF 4644.155.471 power take-off is designed for the WG 200 Series transmissions, including models WG180, WG200, and WG210. It is also compatible with select ZF Ecomat and Ecolife variants that share the same PTO mounting interface. The unit integrates seamlessly with a TRANSMISSION HOUSING (4644301226) and requires proper identification via a TYPE PLATE (0730365067) for correct installation. Secure fastening is achieved using a GROOVED STUD (0631311009) to prevent loosening under vibration. Always verify the shift mechanism type (pneumatic vs. mechanical) before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101222 | TRANSMISSION HOUSING | Encloses and supports transmission gears and shafts |
| 4644301226 | TRANSMISSION HOUSING | Alternate housing variant for WG200 series |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures PTO mounting flange to housing |
| 4644301298 | COVER PLATE | Seals unused PTO openings on transmission |
| 0634306525 | O-RING | Prevents oil leaks at PTO housing interface |
| 0636305026 | SCREW PLUG | Closes oil passages during service |
| 4475280078 | ADAPTER | Converts PTO output flange to different pump sizes |
| 4644301279 | SCREEN SHEET | Filters debris from transmission oil supply |
| 4644301088 | SEALING CAP | Protects unused PTO ports from contamination |
