Overview
The ZF 4646.156.008 Power Take-Off (PTO) is a critical OEM genuine component engineered specifically for the WG260 transmission series and its closely related variants. This unit transfers engine torque to auxiliary hydraulic pumps, enabling the operation of dump bodies, winches, and other secondary equipment. Positioned on the transmission housing, it engages via a pneumatic or mechanical shift mechanism. The SKU 4646.156.008 is precision-machined to ZF’s exacting tolerances, ensuring seamless integration with the TRANSMISSION HOUSING and the HOUSING assembly. This part is a direct replacement for worn units, restoring full power output to your drivetrain.
Symptoms of Failure
- Hydraulic pump gear slipping under load: When the PTO gear teeth wear, you may notice intermittent or complete loss of hydraulic power during operation, especially when the transmission is under heavy torque.
- Oil leaks around the PTO mounting flange: A failing seal or cracked housing can cause transmission fluid to weep from the joint, leading to low fluid levels and potential gearbox damage.
- Unusual grinding or whining noise from the transmission side: Worn bearings or misaligned shafts inside the PTO produce audible metal-on-metal sounds that intensify with engine RPM.
- Difficulty engaging or disengaging the PTO: If the shift mechanism binds or the internal clutch pack fails, the PTO may stick in the engaged position or refuse to activate.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4646.156.008 |
| Material | High-strength alloy steel with hardened gears |
| Weight | Approx. 8.5 kg (18.7 lbs) |
| Dimensions (L x W x H) | 210 mm x 180 mm x 150 mm |
| Mounting Bolt Torque | 80 Nm (59 ft-lbs) |
| OEM Reference | ZF 4646.156.008 |
Compatibility
This Power Take-Off is designed for ZF WG series transmissions, specifically the WG180, WG200, WG258, WG260, WG261, WG308, WG310, and WG311 models. It fits both standard and heavy-duty configurations used in municipal trucks, construction vehicles, and agricultural machinery. For secure installation, use the HEXAGON SCREW and CAP SCREW fasteners to attach the unit to the transmission housing. Always verify your transmission’s serial number before ordering to ensure proper fitment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4646101156 | TRANSMISSION HOUSING | Main casing that encloses the gear train and supports the PTO |
| 4646301327 | HOUSING | Secondary housing for auxiliary drive components |
| 0636015304 | HEXAGON SCREW | Fastener for securing the PTO to the transmission |
| 0636101828 | CAP SCREW | High-tensile bolt for mounting flanges |
| 4646301102 | COVER SHEET | Protective plate over the PTO access port |
| 4646301285 | COVER SHEET | Alternate cover sheet for different housing variants |
| 0730365190 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment pin for precise PTO positioning |
| 0636101193 | CAP SCREW | Bolt for securing the cover sheet |
| 0636010179 | HEXAGON SCREW | Fastener for housing attachment |
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