Overview
The ZF 4657.155.412 POWER TAKE-OFF for WG171 is an OEM genuine part engineered to transfer engine torque from the transmission to auxiliary hydraulic or mechanical systems. Mounted directly onto the side of the ZF WG171 series transmission, this PTO unit engages via a sliding gear mechanism to power pumps, winches, or compressors without interrupting the driveline. The SKU 4657.155.412 is precision-machined to ZF factory tolerances, ensuring seamless integration with the TRANSMISSION HOUSING and the HOUS.FRONT SECT for reliable power take-off in heavy-duty commercial vehicles.
Symptoms of Failure
- Oil leaks around the PTO mounting flange – Worn seals or gaskets cause transmission fluid to weep, often visible as drips under the vehicle near the TUBE assembly.
- Grinding or whining noise during engagement – Internal gear wear or bearing failure produces metallic sounds when the PTO is activated, indicating imminent slippage.
- Intermittent or complete loss of auxiliary power – The PTO fails to transmit torque to the hydraulic pump, often due to a damaged shift fork or worn clutch teeth.
- Difficulty engaging or disengaging the PTO – Sticking shift mechanisms or contaminated oil cause the unit to bind, requiring excessive force on the control lever.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.155.412 |
| OEM Reference | ZF WG171 Series PTO |
| Material | High-strength cast iron housing with hardened steel gears |
| Weight | Approx. 8.5 kg (18.7 lbs) |
| Dimensions (L x W x H) | 210 mm x 150 mm x 120 mm |
| Input Speed Range | Up to 2500 RPM |
| Torque Capacity | 450 Nm (332 ft-lbs) |
| Mounting Interface | SAE A or B (dependent on application) |
| Seal Type | Viton dual-lip oil seal |
Compatibility
This ZF 4657.155.412 POWER TAKE-OFF is specifically designed for the WG 171 Series transmission family. It is also compatible with select models in the WG180 and WG200 series when used with the appropriate adapter kit. The unit directly interfaces with the SCREEN SHEET for oil filtration and the HOUSING REAR PART for structural support. Always verify the PTO gear ratio and shift mechanism alignment with your specific transmission model before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656301066 | HOUS.FRONT SECT | Front section housing input shaft |
| 4656201015 | SCREEN SHEET | Oil strainer for hydraulic circuit |
| 4656301037 | TUBE | Oil delivery conduit |
| 0634313514 | O-RING | Sealing element for fluid joints |
| 0636100803 | CAP SCREW | Fastener for housing assembly |
| 4656301064 | HOUSING REAR PART | Rear casing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precision fit |
| 0636100801 | CAP SCREW | Fastener for PTO mounting |
| 0636100160 | CAP SCREW | Fastener for cover plate |
Frequently Asked Questions
Q: Can the ZF 4657.155.412 PTO be used on a WG180 transmission?
A: Yes, with the correct adapter plate and shift linkage kit. However, the gear ratio may differ, so verify the output speed matches your hydraulic pump requirements.
Q: What causes premature failure of this PTO unit?
A: Common causes include low transmission oil level, contaminated fluid, or misalignment during installation. Always replace the O-RING and CAP SCREW when reinstalling to prevent leaks.
Q: Does this part include the shift mechanism?
A: No, the 4657.155.412 is the PTO gear assembly only. The shift fork and actuator are sold separately. Refer to the HOUSING REAR PART for additional mounting details.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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