Overview
This ZF 4656.073.308 3 WG 171 Powershift Transmission Assembly is a complete, ready-to-install unit designed for heavy-duty off-highway applications. As a fully assembled gearbox, it integrates the main drive components, clutch packs, and hydraulic control elements into a single robust package. The SKU 4656.073.308 sits at the core of the powertrain, directly coupling to the engine and transferring torque through the transmission housing and front section. For optimal sealing and alignment, this assembly works in conjunction with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to ensure precise gear engagement and oil distribution.
Symptoms of Failure
When the ZF 4656.073.308 assembly begins to fail, operators typically notice distinct operational issues. Delayed or harsh gear engagement is a primary symptom, often caused by worn clutch discs or degraded seals within the unit. Another common sign is erratic shifting under load, where the transmission hunts between gears or slips during acceleration. External oil leaks around the main case seams frequently occur as gaskets and O-rings age, leading to low fluid levels and overheating. Finally, unusual whining or grinding noises from the bell housing area indicate bearing wear or contamination from debris passing through the SCREEN SHEET filter.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4656.073.308 |
| Assembly Type | Complete Powershift Transmission (3 WG 171) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 480 mm |
| Housing Material | High-Grade Cast Iron |
| OEM Reference | ZF 3 WG 171 Series |
| Torque Capacity (est.) | 1,200 Nm |
| Hydraulic Pressure Range | 12–18 bar |
Compatibility
This complete unit is specifically engineered for the ZF WG 171 series of powershift transmissions. It is directly compatible with models such as the WG 171, WG 180, and WG 200, which are commonly found in wheel loaders, forklifts, and telehandlers. The assembly also fits select variants of the WG 150 and WG 250 series when paired with the correct TUBE for hydraulic line routing. Always verify your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101072 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4656301168 | HOUS.FRONT SECT | Front section housing for input shaft and bearings |
| 4656201015 | SCREEN SHEET | Fine mesh filter for hydraulic oil debris |
| 4656301037 | TUBE | Hydraulic fluid passage conduit |
| 0634313514 | O-RING | Seals fluid connections against leaks |
| 0636100803 | CAP SCREW | Fastener for housing assembly |
| 4656301169 | HOUSING REAR PART | Rear casing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precision assembly |
| 0636100801 | CAP SCREW | High-strength bolt for clutch pack retention |
| 0636100160 | CAP SCREW | Mounting bolt for valve body attachment |
Frequently Asked Questions
Q: Can this assembly be rebuilt, or is it a sealed unit?
A: The ZF 4656.073.308 is designed as a serviceable unit. It can be disassembled for inspection and replacement of internal components such as clutch discs, seals, and bearings. We recommend using OEM parts like the O-RING and CAP SCREW during reassembly to maintain factory tolerances.
Q: What is the typical lifespan of this transmission assembly?
A: Under normal operating conditions with regular fluid changes and filter maintenance, the 3 WG 171 assembly can last 8,000 to 12,000 hours. Contamination from a damaged SCREEN SHEET is a common cause of premature failure.
Q: Does this unit include the torque converter?
A: No, the 4656.073.308 is the transmission assembly only. The torque converter is a separate component that mounts to the HOUS.FRONT SECT and must be ordered independently.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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