Overview
The ZF 4657.024.024 4 WG 190 Powershift Transmission Assembly is a complete, factory-sealed unit designed for heavy-duty off-highway applications. This assembly serves as the central power distribution hub within the WG 190 series, integrating the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. The SKU 4657.024.024 is a direct OEM replacement that eliminates the need for partial rebuilds, ensuring full hydraulic integrity and gear alignment. When installed, it mates directly to the TRANSMISSION HOUSING and is secured by the HOUS.FRONT SECT and HOUSING REAR PART to form the complete drivetrain envelope.
Symptoms of Failure
- Erratic gear engagement under load: When the internal clutch packs or valve body wear out, operators experience delayed or harsh shifting, particularly when moving from forward to reverse. This is a common failure mode for the complete unit.
- Torque converter shudder at low RPM: A vibration or “chatter” during inching or low-speed maneuvering indicates internal stator or turbine damage within the 4657.024.024 assembly.
- External oil seepage from the bell housing: Cracks in the main casing or degraded seals cause transmission fluid to leak from the joint between the assembly and the CYLINDRICAL PIN alignment points.
- Loss of power to the wheels: A complete unit that has suffered internal bearing failure will spin freely without transferring torque, requiring immediate replacement of the entire assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.024.024 |
| Assembly Type | 4 WG 190 Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| Input Torque Capacity | 1,900 Nm (1,400 lb-ft) |
| Fluid Capacity | 18.5 liters (4.9 gallons) |
| OEM Reference | ZF 4 WG 190 |
Compatibility
This complete unit is engineered for the ZF WG 190 series, which includes the WG 180, WG 190, and WG 200 transmission models used in wheel loaders, telehandlers, and industrial tractors. It is a direct fit for machines originally equipped with the 4-speed powershift variant. The assembly interfaces with the TRANSMISSION HOUSING and requires the HOUS.FRONT SECT for proper alignment. Always verify the serial number of your existing unit against the 4657.024.024 to ensure compatibility with your specific drivetrain configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201012 | HOUSING REAR PART | Rear section housing for output shaft support |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for oil circuit |
| 0636100803 | CAP SCREW | Fastener for valve body cover |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutches |
Frequently Asked Questions
Q: Can I install this complete unit without replacing the TRANSMISSION HOUSING?
A: Yes, the 4657.024.024 is designed to bolt directly into an existing, undamaged TRANSMISSION HOUSING. However, we recommend inspecting the housing for cracks or wear at the pin bores before installation.
Q: What is the typical service life of this assembly under heavy load?
A: In wheel loader applications with proper maintenance (clean oil and filter changes every 1,000 hours), the 4 WG 190 unit typically lasts 8,000 to 10,000 hours before requiring a rebuild.
Q: Does this unit include the valve body and torque converter?
A: Yes, the 4657.024.024 is a complete assembly that includes the torque converter, all clutch packs, and the hydraulic valve body. You only need to transfer external sensors and the CYLINDRICAL PIN from your old unit.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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