Overview
The ZF 4660.155.003 POWER TAKE-OFF is an OEM genuine component engineered specifically for the WG 92 and WG 98 transmission series. This unit serves as the primary interface for auxiliary power extraction, transferring rotational energy from the transmission’s internal gearing to external hydraulic pumps or mechanical drives. As a critical power take-off (PTO) assembly, it mounts directly to the transmission housing and engages via a pneumatic or mechanical shift mechanism. The SKU 4660.155.003 is precision-machined to ZF’s exacting tolerances, ensuring seamless integration with the drivetrain and preventing parasitic power loss during operation.
Symptoms of Failure
When the 4660.155.003 begins to wear, operators may notice oil leaks around the PTO mounting flange, often caused by degraded seals or housing cracks. Another common issue is gear slipping under load, which manifests as intermittent power delivery to auxiliary equipment. Additionally, unusual grinding or whining noises during engagement indicate worn bearings or gear teeth. Finally, difficulty engaging or disengaging the PTO suggests internal shift fork or actuator failure, requiring immediate inspection to avoid transmission damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.155.003 |
| OEM Reference | ZF 4660.155.003 |
| Material | High-grade cast iron with hardened steel gears |
| Weight | 12.4 kg (27.3 lbs) |
| Dimensions (L x W x H) | 320 mm x 180 mm x 210 mm |
| Input Speed Max | 2,500 RPM |
| Torque Capacity | 650 Nm |
| Mounting Flange | SAE B 2-bolt |
| Shift Type | Pneumatic (standard) |
Compatibility
This PTO is designed for the ZF WG 92 Series and ZF WG 98 Series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with the WG180, WG200, and WG250 models when configured with the appropriate adapter kit. For proper installation, ensure the 4660101023 TRANSMISSION HOUSING is free of cracks and the 4660301058 HOUSING is aligned correctly. Secure the assembly using the 0631306174 CYLINDRICAL PIN for precise dowel alignment, and seal the oil passage with the 0750100022 SCREW PLUG to prevent leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101023 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4660301058 | HOUSING | Secondary housing for PTO mounting |
| 0631306174 | CYLINDRICAL PIN | Dowel pin for alignment of components |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 4660301009 | BRACKET | Support bracket for PTO mounting |
| 4660221039 | TUBE | Oil supply tube for lubrication |
| 0636103274 | CAP SCREW | Fastener for securing PTO to housing |
| 0634306185 | O-RING | Seal between PTO and transmission |
| 4660221041 | TUBE | Return oil tube for cooling |
| 4660221040 | TUBE | Pressure feed tube for hydraulics |
