Overview
The ZF 4657.155.015 POWER TAKE-OFF for WG171 is a critical OEM genuine component engineered to transfer engine power from the transmission to auxiliary hydraulic systems. This PTO unit mounts directly to the side of the WG 171 series transmission, engaging via a pneumatic or mechanical shift mechanism to drive pumps for dump bodies, winches, or concrete mixers. The SKU 4657.155.015 is precision-machined to ZF’s exacting tolerances, ensuring seamless integration with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain oil flow and structural rigidity. As a direct replacement, this part eliminates guesswork and reduces downtime for fleet operators.
Symptoms of Failure
When the ZF 4657.155.015 PTO begins to fail, operators often notice these specific symptoms:
- Hydraulic pump not engaging or slipping under load – A worn shift fork or damaged internal gears cause intermittent power take-off engagement, especially during cold starts.
- Oil leaks around the PTO mounting flange – Degraded seals or a cracked housing allow transmission fluid to escape, leading to low oil levels and potential gear damage.
- Unusual grinding or whining noise from the PTO area – Bearing wear or gear tooth chipping produces audible distress signals that worsen with RPM.
- Difficulty shifting PTO in or out of gear – Corrosion or debris in the shift mechanism prevents smooth actuation, often accompanied by a stiff lever or delayed response.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.155.015 |
| Material | High-strength cast iron with hardened steel gears |
| Weight | Approx. 8.2 kg (18.1 lbs) |
| Mounting Flange Dimensions | SAE B 2-bolt (146 mm bolt circle) |
| Max Input Torque | 450 Nm (332 lb-ft) |
| Shift Type | Pneumatic or mechanical (dependent on application) |
| Oil Capacity | 0.6 liters (integral with transmission sump) |
Compatibility
This PTO is specifically designed for the ZF WG 171 series, but it also fits select models in the WG 180 and WG 200 families when used with the correct adapter kit. It is fully compatible with the SCREEN SHEET and the TUBE that route oil to the PTO cavity. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural casing for gear sets and PTO mounting |
| 4656301066 | HOUS.FRONT SECT | Front section housing input shaft and bearings |
| 4656201015 | SCREEN SHEET | Oil filter screen protecting PTO hydraulic circuit |
| 4656301037 | TUBE | Oil supply tube connecting transmission to PTO |
| 0634313514 | O-RING | Seals PTO flange to prevent oil leaks |
| 0636100803 | CAP SCREW | M10 fastener for securing PTO housing |
| 4656301064 | HOUSING REAR PART | Rear transmission housing supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise PTO positioning |
| 0636100801 | CAP SCREW | M8 fastener for PTO cover plate |
| 0636100160 | CAP SCREW | M12 fastener for heavy-duty PTO mounting |
Frequently Asked Questions
Q: Can the ZF 4657.155.015 PTO be used on a WG 200 transmission?
A: Yes, with the correct adapter plate and confirmation of spline count. The PTO shares the same SAE B mounting pattern as the WG 171, but always cross-reference your transmission model code.
Q: What causes premature failure of this PTO?
A: The most common causes are contaminated transmission oil (debris bypassing the SCREEN SHEET) and over-torquing the mounting bolts, which warps the housing. Regular oil analysis helps prevent both issues.
Q: Does this PTO come with a gasket or seal kit?
A: No, the 4657.155.015 is sold as a bare unit. We recommend ordering the O-RING and CAP SCREW separately to ensure a leak-free installation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
