Overview
This ZF 4657.024.172 4 WG 190 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty industrial applications. As the core hydraulic-mechanical assembly in the WG 190 series, it integrates the torque converter, planetary gear sets, and clutch packs into a single ready-to-install package. The SKU 4657.024.172 replaces worn or failed assemblies in wheel loaders, forklifts, and material handlers, restoring full power flow and shift quality. It sits between the engine flywheel and the final drive, directly coupling to the TRANSMISSION HOUSING which provides structural support for the entire drivetrain.
Symptoms of Failure
- Delayed or harsh engagement – When the assembly wears, internal clutch packs slip, causing a noticeable lag when shifting from neutral to forward or reverse. Operators often report a “bang” or shudder during gear changes.
- Low hydraulic pressure and overheating – Worn seals and valve body wear within the 4657.024.172 unit lead to pressure drops, triggering transmission over-temp warnings and reduced torque output under load.
- Oil leaks at housing joints – Fatigue cracks or gasket failures in the assembly allow ATF to seep past the HOUS.FRONT SECT and HOUSING REAR PART, leaving visible puddles under the machine after shutdown.
- Intermittent power loss on inclines – A failing torque converter stator or worn clutches cause the transmission to “break away” under heavy load, making the machine unable to climb grades or lift rated loads.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.024.172 |
| Assembly Type | 4 WG 190 Powershift (Complete Unit) |
| 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) |
| Torque Converter Diameter | 340 mm |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 4657.024.172 (4 WG 190) |
Compatibility
This complete assembly is engineered for the ZF WG 190 series, specifically the 4-speed WG 190 variant. It is directly compatible with ZF WG 180, WG 190, and WG 200 transmission models that share the same bellhousing bolt pattern and input shaft spline count. The unit also fits select models of the WG 170 series when used with the appropriate HOUSING REAR SECTION adapter. Always verify your transmission serial number against the 4657.024.172 configuration before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and supports all internal components. |
| 4657201166 | HOUS.FRONT SECT | Front section housing that mounts the torque converter and input shaft assembly. |
| 4657201168 | HOUSING REAR PART | Rear housing segment that contains the output shaft and parking brake interface. |
| 4657298101 | HOUSING REAR SECTION | Alternative rear housing section used in extended wheelbase applications. |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise positioning of housing halves during assembly. |
| 0636100801 | CAP SCREW | M12 x 1.5 high-tensile bolt securing the housing to the bellhousing. |
| 4656301148 | FIXING PLATE | Locking plate that prevents cap screw loosening under vibration. |
| 4657301032 | SCREEN SHEET | Fine mesh filter screen for the main hydraulic suction line. |
| 4657301033 | SCREEN SHEET | Coarse mesh filter screen for the torque converter return line. |
| 0636100803 | CAP SCREW | M10 x 1.5 bolt used for securing the rear housing section. |
Frequently Asked Questions
Q: Can the 4657.024.172 assembly be rebuilt, or must it be replaced as a complete unit?
A: While internal components like clutch packs and seals are serviceable, ZF recommends replacing the complete 4 WG 190 assembly when the housing or torque converter shows wear. The unit is balanced and pressure-tested as a whole, so partial rebuilds often lead to premature failure of adjacent parts.
Q: What is the typical lifespan of this transmission assembly in a wheel loader application?
A: Under normal operating conditions with proper maintenance (clean fluid, correct filter intervals), the 4657.024.172 can last 8,000 to 12,000 hours. Heavy shock loading or contaminated hydraulic fluid significantly reduces this lifespan.
Q: Does this assembly include the torque converter and valve body?
A: Yes, the complete unit 4657.024.172 ships as a fully assembled powershift transmission including the torque converter, integrated valve body, and all clutch packs. It does not include the external control harness or transmission oil cooler.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
