Overview
The ZF 4644.154.046 POWER TAKE-OFF for WG200 | OEM Genuine Part is a critical auxiliary power interface engineered specifically for ZF’s WG200 series transmissions. This PTO unit mounts directly to the transmission housing, enabling the extraction of mechanical power to drive hydraulic pumps, compressors, or other ancillary equipment. As an OEM genuine component, the SKU 4644.154.046 ensures precise gear engagement and load-bearing capacity, maintaining the drivetrain’s integrity during high-torque operations. It interfaces seamlessly with the 4644105413: DISCONNECTION mechanism to control power flow, and its installation requires proper alignment with the 4642303093: OUTPUT FLANGE for optimal torque transfer.
Symptoms of Failure
- Hydraulic system pressure loss or erratic operation – When the PTO gears wear, power take-off efficiency drops, causing “ZF WG200 PTO pressure fluctuation” and reduced pump output.
- Audible gear whine or grinding noises – Worn bearings or gear teeth produce distinct “ZF 4644.154.046 grinding noise” during engagement, especially under load.
- Oil seepage around the PTO mounting flange – Degraded seals lead to “ZF WG200 PTO oil leak” at the interface with the 4644101040: TRANSMISSION HOUSING, contaminating the clutch area.
- Intermittent or failed PTO engagement – A failing disconnection unit causes “ZF PTO not engaging” symptoms, often traced to worn splines or shift fork issues.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number (SKU) | 4644.154.046 |
| Product Type | Power Take-Off (PTO) Assembly |
| Material | High-grade cast iron housing with hardened steel gears |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Mounting Bolt Pattern | 6x M12 bolts on 130 mm PCD |
| Output Shaft Spline | SAE B 6-tooth (1-1/4″ pilot) |
| Max Torque Capacity | 450 Nm (332 ft-lb) |
| OEM Reference | ZF 4644.154.046 (Genuine) |
| Compatible Fastener | 0636021010: HEXAGON SCREW (M12x1.5×35) |
Compatibility
This PTO is engineered for the ZF WG200 series transmission family, including models WG180, WG200, and WG210. It is also backward-compatible with certain WG150 variants when used with the appropriate OUTPUT FLANGE adapter. The unit directly replaces OEM part 4644.154.046 in all WG200-series applications, including refuse trucks, concrete mixers, and fire apparatus. Always verify housing compatibility with your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644105413 | DISCONNECTION | Controls PTO engagement/disengagement |
| 4642303093 | OUTPUT FLANGE | Transfers torque from PTO to driven equipment |
| 0636021010 | HEXAGON SCREW | Secures PTO to transmission housing |
| 4644101040 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301197 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification label for transmission model |
| 0631311009 | GROOVED STUD | Alignment dowel for PTO mounting |
| 0636015073 | HEXAGON SCREW | Fastener for output flange retention |
| 0634801250 | SEALING RING | Prevents oil leakage at PTO interface |
| 0636305026 | SCREW PLUG | Seals unused PTO port openings |
