Overview
The ZF 4656.073.043 3 WG 171 Powershift Transmission Assembly is a complete, remanufactured-ready unit engineered for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. Designed as a direct replacement for the WG 171 series, the SKU 4656.073.043 sits at the core of the drivetrain, managing torque distribution across three forward and three reverse speeds. It interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a sealed, pressurized oil circuit. This complete unit eliminates the need for piecemeal rebuilding, offering a drop-in solution for fleet managers and service centers.
Symptoms of Failure
- Delayed or harsh shifting under load: Worn clutch discs or degraded seals inside the 4656.073.043 cause hesitation when engaging gears, especially during directional changes.
- Low hydraulic pressure and oil starvation: A failing unit often produces insufficient pump pressure, leading to erratic clutch engagement and eventual transmission overheating.
- External oil seepage from the main case joint: Cracks or gasket failure at the interface with the TUBE or housing flanges result in visible drips and reduced fluid levels.
- Metallic debris in the oil pan: Internal gear wear or bearing spalling produces fine metal particles, often first detected during routine filter inspections.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.073.043 |
| Series | WG 171 (3-speed powershift) |
| Dry Weight | ~185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Max Input Torque | 1,200 Nm |
| Oil Capacity | 14 liters (SAE 10W-30) |
| Compatible Filter Screen | SCREEN SHEET (4656201015) |
Compatibility
This complete assembly is specifically designed for the ZF WG 171 transmission family. It is also mechanically compatible with the WG 180 and WG 200 series when used with the appropriate adapter housings. The unit shares its clutch pack configuration with the WG 150 series, though the main case casting differs. Always verify the bellhousing pattern against your existing HOUS.FRONT SECT before installation. The 4656.073.043 is commonly found in ZF-supplied drivelines for telehandlers, wheel loaders, and rough-terrain forklifts from manufacturers such as Manitou, JCB, and Linde.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and oil sump. |
| 4656301066 | HOUS.FRONT SECT | Front section housing that supports the input shaft and pump drive. |
| 4656201015 | SCREEN SHEET | Fine mesh filter screen protecting the hydraulic control valve from debris. |
| 4656301037 | TUBE | Oil delivery tube connecting the pump to the clutch modulation circuit. |
| 0634313514 | O-RING | Seals the tube-to-housing interface to prevent external leaks. |
| 0636100803 | CAP SCREW | M10 x 30 flange-head bolt for securing the front housing section. |
| 4656301042 | HOUSING REAR PART | Rear housing section that supports the output shaft and PTO drive. |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for precise alignment of housing halves during assembly. |
| 0636100801 | CAP SCREW | M8 x 25 hex-head bolt for the oil pan and filter cover. |
| 0636100160 | CAP SCREW | M16 x 40 bolt for the main bearing cap retention. |
Frequently Asked Questions
Q: Is the 4656.073.043 a direct bolt-in replacement for the original ZF WG 171 unit?
A: Yes, this complete assembly is manufactured to OEM specifications and includes all internal components. It will bolt directly to your existing TRANSMISSION HOUSING without modifications.
Q: What is the typical service life of this powershift assembly under normal operating conditions?
A: With proper maintenance—including regular oil changes and filter screen cleaning—the 4656.073.043 typically delivers 8,000 to 12,000 hours of service. Early replacement of the SCREEN SHEET can extend this interval significantly.
Q: Can I install this unit without replacing the associated O-rings and cap screws?
A: We strongly recommend replacing all sealing elements and fasteners during installation. Use the O-RING (0634313514) and CAP SCREW (0636100803) to ensure a leak-free, torque-verified assembly.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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