Overview
The ZF 4656.073.307 3 WG 171 Powershift Transmission Assembly is a complete, drop-in replacement unit engineered for heavy-duty off-highway machinery. This fully assembled transmission integrates the main drive housing, clutch packs, and hydraulic control system into a single, pre-tested module. The SKU 4656.073.307 identifies the complete assembly, which sits between the engine bell housing and the final drive, managing torque distribution across three forward and three reverse speeds. It is designed to interface directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure precise alignment of internal shafts.
Symptoms of Failure
When the ZF 4656.073.307 assembly begins to fail, operators typically notice three distinct issues. First, delayed engagement when shifting from neutral to forward or reverse, often accompanied by a harsh clunk, indicates worn clutch discs. Second, erratic gear slipping under load—where the transmission momentarily loses power during uphill travel—points to hydraulic pressure loss within the assembly. Third, external oil leaks from the main case seams, often traced to a degraded O-RING or cracked housing. Fourth, contaminated transmission fluid with metallic debris suggests internal gear wear, requiring immediate replacement of the SCREEN SHEET filter element.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.073.307 |
| Assembly Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | Cast Iron (GGG-40) |
| Clutch Type | Wet, Multi-Disc (Oil-Cooled) |
| Max Input Torque | 1,700 Nm |
| OEM Reference | ZF WG 171 Series |
| Related Housing Part | HOUSING REAR PART |
| Fastener Kit | CAP SCREW (M12 x 1.75) |
Compatibility
This complete unit is specifically engineered for the ZF WG 171 series powershift transmissions. It is directly compatible with models WG 171, WG 180, and WG 200, which are commonly found in telescopic handlers, wheel loaders, and rough-terrain forklifts. The assembly also fits select variants of the WG 150 series when paired with the correct TUBE for hydraulic line routing. For precise fitment verification, always cross-reference your existing transmission serial number with the SKU 4656.073.307.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101072 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4656301168 | HOUS.FRONT SECT | Front section housing input shaft |
| 4656201015 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301037 | TUBE | Hydraulic oil transfer conduit |
| 0634313514 | O-RING | Seals housing joints against leaks |
| 0636100803 | CAP SCREW | Fastener for housing assembly |
| 4656301169 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | Fastener for clutch pack cover |
| 0636100160 | CAP SCREW | Fastener for valve body mounting |
Frequently Asked Questions
Q: Can the ZF 4656.073.307 be rebuilt, or is it only sold as a complete unit?
A: This SKU is a complete, pre-assembled transmission. While internal components like clutch discs are serviceable, the assembly is designed for direct replacement to minimize downtime. We recommend replacing the SCREEN SHEET and O-RING during installation.
Q: What is the typical lifespan of this powershift assembly in a wheel loader?
A: With proper maintenance and clean hydraulic fluid, the ZF 4656.073.307 typically lasts 8,000–12,000 operating hours. Early failure is often caused by a clogged SCREEN SHEET or loose CAP SCREW fasteners.
Q: Does this unit include the housing and front section?
A: Yes, the complete assembly includes the main TRANSMISSION HOUSING and HOUS.FRONT SECT. The HOUSING REAR PART is also pre-installed.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
