Overview
The ZF 4644.154.483 POWER TAKE-OFF is a critical auxiliary power interface engineered specifically for the WG 200 Series transmission. This OEM genuine part, identified by SKU 4644.154.483, mounts directly to the transmission housing to divert engine torque to hydraulic pumps or other driven equipment. Designed for heavy-duty industrial applications, it ensures seamless power extraction without compromising the main driveline’s integrity. When installed alongside a robust TRANSMISSION HOUSING, this PTO unit maintains precise gear engagement and oil flow control, making it indispensable for refuse trucks, fire apparatus, and construction machinery.
Symptoms of Failure
- Hydraulic pump lag or intermittent power loss — Worn internal gears cause delayed engagement when activating auxiliary systems, often searched as “PTO not engaging smoothly.”
- Oil seepage around the PTO mounting flange — Degraded seals lead to visible drips, matching queries like “ZF PTO oil leak at housing joint.”
- Metallic grinding noise during PTO operation — Bearing or gear wear produces distinct sounds, frequently reported as “whining PTO under load.”
- Excessive vibration at idle with PTO engaged — Misalignment or worn splines cause shuddering, a common symptom for “PTO vibration in WG200 transmission.”
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4644.154.483 |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | Approx. 12.5 kg (27.6 lbs) |
| Dimensions (L x W x H) | 280 mm x 180 mm x 160 mm |
| Input Speed Range | Up to 2500 RPM continuous |
| Torque Capacity | 450 Nm peak |
| Sealing System | Integrated lip seals with O-ring groove |
| Compatible Fasteners | M12 x 1.5 bolts (not included) |
Compatibility
This PTO is primarily designed for the ZF WG 200 Series transmissions, including models WG200, WG210, and WG211. It also retrofits to earlier WG180 variants when used with the correct TRANSMISSION HOUSING adapter. For proper identification, always cross-reference the TYPE PLATE affixed to your transmission. The unit integrates with the COVER PLATE assembly to ensure debris-free operation. It is not compatible with ZF Ecomat or AS Tronic series without significant modification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101275 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301406 | TRANSMISSION HOUSING | Alternate housing variant for WG180 |
| 0730301612 | TYPE PLATE | Identification plate with model/serial |
| 4644301298 | COVER PLATE | Seals PTO access opening |
| 0634306323 | O-RING | Hydraulic seal for PTO flange |
| 0636305026 | SCREW PLUG | Oil drain/fill port closure |
| 4644301279 | SCREEN SHEET | Filter mesh for oil intake |
| 4644301088 | SEALING CAP | Protects unused PTO ports |
| 4644106328 | SHIFT SYSTEM | Controls PTO engagement mechanism |
| 4644109045 | PARKING BRAKE | Integrated brake for stationary PTO use |
