Overview
The ZF 4646.154.426 POWER TAKE-OFF is a critical OEM genuine component engineered specifically for the WG 261 and WG 311 series transmissions. This unit transfers engine torque to auxiliary hydraulic systems, such as dump truck hoists or concrete mixer drums, by engaging directly with the transmission’s gear train. As a factory-sourced part, the SKU 4646.154.426 ensures precise fitment and load capacity matching ZF’s original design specifications. It mounts on the transmission housing and operates through a pneumatic or mechanical shift mechanism, making it indispensable for vocational vehicles requiring continuous hydraulic power.
Symptoms of Failure
- Hydraulic pressure drop under load: A worn PTO unit often fails to maintain consistent output, causing sluggish operation of attached equipment. This is a common search query for “ZF PTO pressure loss WG261.”
- Oil seepage around the mounting flange: Degraded seals allow transmission fluid to escape, leaving visible drips under the vehicle. This symptom is frequently searched as “PTO oil leak ZF WG311.”
- Grinding noise during engagement: Worn gears or bearings produce a metallic chatter when the PTO is activated, indicating internal damage. Technicians often look for “noisy power take-off ZF 4646.154.426.”
- Intermittent disengagement: A failing shift mechanism causes the PTO to slip out of gear unexpectedly, disrupting hydraulic flow. This issue is searched as “PTO slipping out of gear ZF.”
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4646.154.426 |
| Weight | 12.5 kg (27.6 lbs) |
| Housing Material | Cast iron (GGG-40) |
| Input Speed Range | 800–2,500 RPM |
| Maximum Torque Capacity | 450 Nm |
| Mounting Bolt Pattern | SAE B 2-bolt |
| Output Shaft Type | DIN 5462 splined |
Compatibility
This genuine PTO is designed for ZF’s WG series transmissions, including the WG180, WG200, WG261, and WG311 models. It also fits select variants of the WG160 and WG250 when equipped with the correct adapter housing. Always verify the transmission serial number and PTO mounting pad configuration before installation. The unit is not compatible with ZF Ecolife or AS Tronic series.
During installation, ensure you use the correct fasteners: the 0636115293 螺栓 and 0736300232 螺栓 secure the PTO to the transmission housing. A 4475280208 SCREW PLUG seals the hydraulic port, while the 0634316523 O-RING prevents oil leaks at the interface. These components are essential for a leak-free, vibration-resistant assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for PTO flange |
| 0736300232 | 螺栓 | Secondary fastening bolt |
| 4475280208 | SCREW PLUG | Hydraulic port seal |
| 0634316523 | O-RING | Gasket for PTO housing |
| 0630361026 | SEALING CAP | Protects unused ports |
| 0501214611 | 齿轮泵 | Hydraulic pump for PTO output |
| 0634313945 | O形圈 | Seal for pump connection |
| 0501322534 | TEMPERATURE SENSOR | Monitors PTO oil temperature |
| 0634313366 | O-RING | Sensor mounting seal |
| 4646130044 | ENGINE CONNECTION | Adapter for engine PTO drive |
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