Overview
The ZF 4656.073.032 3 WG 171 Powershift Transmission Assembly is a complete, factory-matched unit engineered for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As a core replacement for the WG 171 series, the SKU 4656.073.032 eliminates the need for piecemeal rebuilding, ensuring precise gear engagement and torque delivery under extreme loads. It sits at the heart of the drivetrain, directly coupling to the TRANSMISSION HOUSING and the HOUS.FRONT SECT to form a sealed, high-pressure oil circuit.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or valve body wear, the transmission may hesitate or fail to hold a gear, especially during uphill grading or heavy pulling.
- Contaminated oil or metallic debris in the filter: Worn bearings or clutch friction material can shed particles, often found when inspecting the SCREEN SHEET during routine service.
- External oil seepage from the main case joint: Cracks or warpage in the assembly can cause fluid loss, often misdiagnosed as a simple seal failure.
- Delayed or harsh shifting in forward/reverse: Hydraulic pressure irregularities within the unit can produce jarring shifts, reducing operator comfort and driveline life.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.073.032 |
| Series | WG 171 (3-speed Powershift) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4656.073.032 |
| Related Seal Kit | 0634313514: O-RING |
| Fastener Spec | 0636100803: CAP SCREW |
Compatibility
This complete unit is specifically designed for the ZF WG 171 series powershift transmissions. It is also mechanically compatible with the WG 180 and WG 200 series when used with the appropriate HOUSING REAR PART adapter. The assembly shares its hydraulic routing with the WG 150 series, though the clutch pack count differs. Always verify the TUBE orientation for your specific model year to ensure proper oil gallery alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Main structural case for gear and shaft support |
| 4656301066 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting the hydraulic valve body |
| 4656301037 | TUBE | Oil transfer tube between pump and clutch circuits |
| 0634313514 | O-RING | Seals the tube and housing joints against pressure loss |
| 0636100803 | CAP SCREW | M10 fastener for securing the front housing section |
| 4656301064 | HOUSING REAR PART | Rear housing supporting the output shaft and PTO |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0636100801 | CAP SCREW | M12 fastener for the rear housing attachment |
| 0636100160 | CAP SCREW | M8 fastener for the screen sheet cover plate |
Frequently Asked Questions
Q: Can the 4656.073.032 be installed without replacing the TRANSMISSION HOUSING?
A: Yes, provided the existing housing is free of cracks and wear. However, we recommend inspecting the TRANSMISSION HOUSING for bore distortion before reuse.
Q: What is the typical service life of this assembly in a wheel loader?
A: Under normal operating conditions with proper oil changes, the unit typically lasts 8,000–10,000 hours. Early failure is often linked to a clogged SCREEN SHEET restricting flow.
Q: Does this assembly include the HOUS.FRONT SECT?
A: Yes, the complete unit 4656.073.032 ships with the HOUS.FRONT SECT pre-installed and torqued to factory specifications.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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