Overview
This complete ZF 4657.023.104 3 WG 190 Powershift Transmission Assembly is a fully integrated unit designed for heavy-duty off-highway machinery. As the core power transfer module in the WG 190 series, it manages clutch engagement and gear selection under high torque loads. The assembly integrates directly with the TRANSMISSION HOUSING to form the structural backbone of the drivetrain. The SKU 4657.023.104 is a direct OEM replacement, ensuring precise fitment and original performance specifications.
Symptoms of Failure
- Delayed or harsh gear engagement: When the internal clutch packs or valve body wear, operators experience a noticeable lag or jarring shift, especially when transitioning from neutral to forward or reverse.
- Low hydraulic pressure and slipping: A worn assembly often causes internal leakage, leading to insufficient clutch pressure. This results in the transmission slipping under load, reducing tractive effort.
- External oil seepage at housing joints: Fatigue cracks or gasket failure around the HOUS.FRONT SECT or HOUSING REAR PART can cause visible oil drips, leading to contamination and eventual component starvation.
- Unusual noise during operation: Worn bearings or damaged planetary gears produce a distinct whining or grinding sound, indicating imminent internal failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.023.104 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 190 |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-strength cast iron |
| Overall Length (approx.) | 620 mm |
| Overall Width (approx.) | 480 mm |
| Overall Height (approx.) | 410 mm |
| OEM Reference | ZF 4657.023.104 |
| Related Fastener | CAP SCREW (0636100801) |
| Related Fastener | CAP SCREW (0636100803) |
| Alignment Component | CYLINDRICAL PIN (0631306816) |
Compatibility
This complete unit is engineered for the ZF WG 190 series. It is directly compatible with WG 190 models and shares mounting interfaces with the WG 180 and WG 200 series when using the appropriate adapter plates. The assembly is designed to work in conjunction with the HOUSING REAR SECTION to complete the drivetrain enclosure. It is commonly found in ZF 3 WG 190 applications for wheel loaders, dozers, and graders.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201168 | HOUSING REAR PART | Rear housing section for output support |
| 4657298101 | HOUSING REAR SECTION | Complete rear enclosure for final drive |
| 0631306816 | CYLINDRICAL PIN | Precision alignment dowel for housing |
| 0636100801 | CAP SCREW | M10 fastener for housing assembly |
| 4656301148 | FIXING PLATE | Retention plate for clutch pack |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M12 fastener for rear housing |
Frequently Asked Questions
Q: Is the 4657.023.104 a direct bolt-in replacement for my existing WG 190 transmission?
A: Yes, this is a complete OEM-spec assembly. It replaces the entire 3 WG 190 unit without modifications, provided your existing TRANSMISSION HOUSING is intact and undamaged.
Q: What causes the housing sections to leak on this assembly?
A: Leaks typically originate at the mating surfaces between the HOUS.FRONT SECT and the main body. Worn gaskets or overtightened CAP SCREW fasteners can distort the sealing surface.
Q: Can I reuse my old fixing plate and screen sheets with this new unit?
A: It is strongly recommended to replace the FIXING PLATE and both SCREEN SHEET components (4657301032 and 4657301033) during installation to prevent debris contamination from the old assembly.
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