Overview
The ZF 4651.154.005 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 100 Series transmission family. This unit serves as the mechanical interface that diverts engine torque to auxiliary hydraulic or pneumatic systems, such as pumps for dump bodies, winches, or refuse compactors. Mounted directly to the transmission’s side cover, the 4651.154.005 engages via a sliding gear mechanism, ensuring reliable power extraction without compromising driveline integrity. As a genuine ZF part, it guarantees precise fitment and long service life in demanding vocational applications.
Symptoms of Failure
- Oil leaks around the PTO mounting flange: Worn seals or housing cracks cause transmission fluid to weep, often visible as drips beneath the vehicle after shutdown.
- Gear slipping under load: When the PTO fails to maintain engagement, operators notice intermittent power loss to auxiliary equipment, especially during high-torque operations like lifting or pumping.
- Grinding or whining noise during engagement: Damaged gear teeth or worn bearings produce audible metallic sounds, indicating imminent internal failure.
- Difficulty engaging or disengaging the PTO: A sticking shift mechanism or worn detent springs prevent smooth operation, often requiring excessive force on the control lever.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4651.154.005 |
| OEM Reference | ZF 4651.154.005 |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | 12.5 kg (27.6 lbs) |
| Overall Dimensions (L x W x H) | 280 mm x 180 mm x 160 mm |
| Mounting Type | Side-mounted, 6-bolt flange pattern |
| Max Torque Capacity | 450 Nm (332 ft-lb) |
| Seal Type | Integrated O-ring (compatible with 0634303928: O-RING) |
Compatibility
This PTO is designed for the ZF WG 100 Series, including models such as WG100, WG120, and WG150. It also fits select variants of the WG180 and WG200 transmissions when used with the appropriate 4651101007: TRANSMISSION HOUSING and 4651301029: HOUSING. For proper sealing, always pair this unit with a new 0634303928: O-RING. In applications requiring a different mounting orientation, the 4651301024: HOUSING adapter may be necessary. Verify your transmission model and PTO drive gear ratio before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for the transmission assembly |
| 4651301029 | HOUSING | Intermediate housing for PTO mounting adapters |
| 0634303928 | O-RING | Seal between PTO flange and transmission housing |
| 4651301024 | HOUSING | Alternate PTO mounting housing for offset installations |
| 4651203002 | SCREEN SHEET | Filter mesh for transmission oil sump |
| 4651303005 | SCREEN SHEET | Secondary oil strainer for hydraulic circuits |
| 0636101032 | CAP SCREW | Fastener for securing PTO to transmission |
| 0630361028 | SEALING CAP | Protective cap for unused PTO ports |
| 4475280060 | SCREW PLUG | Threaded plug for oil drain or test points |
| 0634303312 | O-RING | Seal for screw plug and cap screw interfaces |
