Overview
The ZF 4644.154.076 POWER TAKE-OFF is a critical OEM genuine component engineered for the WG 201 Series transmission family. This unit interfaces directly with the transmission housing to transfer engine torque to auxiliary hydraulic or mechanical systems, such as pumps or winches. Designed for heavy-duty commercial vehicles and industrial machinery, the SKU 4644.154.076 ensures precise engagement and disengagement of power output without compromising driveline integrity. It mounts on the side of the transmission, utilizing a robust gear train to deliver consistent performance under high load conditions. As a genuine ZF part, it guarantees exact fitment and durability, reducing the risk of premature wear in demanding applications.
Symptoms of Failure
When the ZF 4644.154.076 POWER TAKE-OFF begins to fail, operators may notice specific performance issues. Common failure symptoms include:
- Oil leaks around the PTO housing – Worn seals or gaskets allow transmission fluid to escape, often visible as drips near the mounting flange.
- Gear slipping or erratic engagement – Internal gear wear or damaged shift forks cause the PTO to disengage unexpectedly under load, leading to intermittent power loss.
- Unusual noise during operation – Grinding or whining sounds indicate bearing failure or gear tooth damage, especially when the PTO is engaged.
- Difficulty shifting in or out of gear – Stiff or unresponsive shift mechanisms suggest internal corrosion or debris buildup within the PTO assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4644.154.076 |
| OEM Reference | ZF WG 201 Series |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | Approx. 8.5 kg (18.7 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 150 mm |
| Mounting Type | Flange-mounted with 6-bolt pattern |
| Max Torque Capacity | 450 Nm (332 ft-lbs) |
| Operating Temperature Range | -20°C to +120°C |
Compatibility
This POWER TAKE-OFF (4644.154.076) is specifically designed for the ZF WG 201 Series transmissions, including models such as WG180, WG200, and WG210. It is also compatible with select WG 200 Series variants that share the same PTO mounting interface. For proper installation, ensure the transmission housing is in good condition; consider pairing this unit with the 4644101160: TRANSMISSION HOUSING or the 4644301323: TRANSMISSION HOUSING if replacement is needed. Additionally, the 4644301189: THREADED BUSH and 4475280043: SCREW PLUG are often replaced simultaneously to ensure a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for the transmission assembly |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for specific WG models |
| 4644301189 | THREADED BUSH | Provides threaded mounting points for PTO bolts |
| 4475280043 | SCREW PLUG | Seals oil passages in the housing |
| 0634306198 | O-RING | Prevents fluid leaks between mating surfaces |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing and PTO components |
| 0631610020 | SET SCREW | Secures adjustment mechanisms |
| 0501218540 | BREATHER | Equalizes internal pressure and vents moisture |
