Overview
The ZF 4656.073.015 3 WG 171 Powershift Transmission Assembly is a complete, factory-matched unit designed 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. As a full replacement for the WG 171 series, the SKU 4656.073.015 eliminates the need for piecemeal repairs, ensuring precise gear engagement under high torque loads. It sits at the core of the driveline, directly coupling the engine output to the final drive. For structural integrity, this unit is typically mounted within a robust TRANSMISSION HOUSING and sealed against the HOUS.FRONT SECT to maintain oil pressure and alignment.
Symptoms of Failure
- Delayed or harsh shifting: When the internal clutch packs or valve body wear, operators experience a noticeable lag between gear changes or a jarring engagement, often accompanied by a loss of hydraulic pressure.
- Oil contamination from clutch debris: Worn friction material can clog the SCREEN SHEET, leading to restricted fluid flow and eventual transmission overheating.
- External fluid seepage: Cracks in the assembly or degraded seals around the TUBE passages cause visible oil leaks, reducing lubrication and risking catastrophic failure.
- Inability to hold gear under load: Slipping occurs when the transmission cannot maintain torque transfer, often resulting in a whining noise or complete loss of drive.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.073.015 |
| Series | WG 171 |
| Assembly Type | Complete Powershift Unit |
| Estimated Dry Weight | 185 kg (408 lbs) |
| Housing Material | High-Grade Cast Iron |
| Overall Length | 720 mm |
| OEM Reference | ZF 3 WG 171 |
| Sealing Kit Reference | 0634313514: O-RING |
| Fastener Spec | 0636100803: CAP SCREW |
Compatibility
This complete assembly is engineered for the ZF WG 171 transmission series. Based on its design architecture, it is also compatible with the WG 180 and WG 200 series when used as a direct replacement for the main gear section. It integrates with the HOUSING REAR PART and requires precise alignment using a CYLINDRICAL PIN for dowel positioning. Additional fasteners such as the CAP SCREW (0636100801) and CAP SCREW (0636100160) are used to secure the assembly to the bell housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Encloses and protects internal gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201015 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4656301037 | TUBE | Routes oil to clutch packs |
| 0634313514 | O-RING | Seals fluid connections |
| 0636100803 | CAP SCREW | Secures housing halves |
| 4656301042 | HOUSING REAR PART | Rear section for output shaft bearing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise assembly |
| 0636100801 | CAP SCREW | Fastener for bell housing |
| 0636100160 | CAP SCREW | Fastener for rear cover |
Frequently Asked Questions
Q: Can the 4656.073.015 assembly be installed without replacing the transmission housing?
A: Yes, but we strongly recommend inspecting the TRANSMISSION HOUSING for cracks or warping. The assembly relies on a flat mating surface to prevent oil leaks.
Q: What causes the screen sheet to clog in a WG 171 transmission?
A: Normal clutch wear produces fine metallic particles. If the SCREEN SHEET is not replaced during a rebuild, these particles restrict flow and cause shifting delays.
Q: Are the cap screws included with this assembly?
A: No. You will need to order 0636100803: CAP SCREW and 0636100160: CAP SCREW separately for a complete installation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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