Overview
This ZF 4657.024.306 4 WG 190 Powershift Transmission Assembly is a complete, ready-to-install unit engineered for heavy-duty industrial applications. As a core component of the WG 190 series, this assembly integrates the main gear train, clutch packs, and hydraulic control system into a single, robust package. The SKU 4657.024.306 is designed to deliver reliable torque conversion and smooth shifting under extreme loads, making it a direct replacement for worn or failed transmissions in construction, mining, and agricultural machinery. It sits at the heart of the driveline, connecting the engine to the final drive, and is typically mounted directly to the TRANSMISSION HOUSING to form a sealed, oil-tight system.
Symptoms of Failure
When the ZF 4657.024.306 assembly begins to fail, operators will notice distinct performance degradation. Common failure symptoms include:
- Erratic or delayed gear engagement: The transmission hesitates or slams into gear, often accompanied by a loud clunk, indicating worn clutch packs or valve body issues.
- Internal oil leaks and low pressure: Visible fluid seepage around the housing seams or a drop in hydraulic pressure, often traced back to a cracked HOUS.FRONT SECT or degraded seals.
- Torque converter shudder: A vibration or shudder during acceleration, particularly under load, signaling imminent failure of the stator or turbine assembly.
- Complete loss of drive: The transmission fails to move the vehicle in any gear, often due to a fractured HOUSING REAR PART or catastrophic bearing failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.024.306 |
| Assembly Type | Complete Powershift Transmission (4 WG 190) |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4 WG 190 |
| Max Input Torque | 1,900 Nm |
| Fluid Capacity | 22 liters (ATF Dexron III) |
| Related Fastener | CAP SCREW (M12 x 1.5) |
| Related Pin | CYLINDRICAL PIN (10×30 mm) |
| Related Plate | FIXING PLATE |
| Related Screen | SCREEN SHEET (fine) |
| Related Screen | SCREEN SHEET (coarse) |
| Related Fastener | CAP SCREW (M16 x 2.0) |
Compatibility
This complete unit is specifically engineered for the ZF WG 190 series, but its core architecture is shared across several models. It is a direct fit for the WG 180, WG 190, and WG 200 transmissions found in heavy loaders, graders, and off-highway trucks. The assembly is also compatible with earlier WG 170 variants when used with the appropriate HOUSING REAR SECTION adapter kit. Always verify the bellhousing pattern and output flange configuration against your original unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201161 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4657201162 | HOUSING REAR PART | Rear casing supporting output shaft |
| 4657298107 | HOUSING REAR SECTION | Adapter housing for alternate PTO mounts |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for front housing attachment |
| 4656301148 | FIXING PLATE | Locks bearing preload on main shaft |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for sump return |
| 0636100803 | CAP SCREW | Fastener for rear housing attachment |
Frequently Asked Questions
Q: Is the ZF 4657.024.306 a direct bolt-in replacement for a WG 190 transmission?
A: Yes, this is a complete assembly that replaces the entire 4 WG 190 unit. It includes all internal components and requires no additional parts beyond the external housings and fasteners listed in the compatibility section.
Q: What causes the transmission to lose hydraulic pressure after installation?
A: Low pressure is often due to a damaged TRANSMISSION HOUSING or a misaligned HOUSING REAR PART. Verify that all sealing surfaces are clean and that the CYLINDRICAL PIN is properly seated to prevent oil bypass.
Q: Can I use this assembly with a different bellhousing pattern?
A: The unit is designed for SAE 3 bellhousing patterns. For non-standard applications, you may need the HOUSING REAR SECTION adapter to match your specific engine flywheel housing.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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