Overview
The ZF 4657.055.323 5 WG 210 Powershift Transmission Assembly is a complete, fully assembled unit designed for heavy-duty industrial applications. This core assembly serves as the primary power transfer module within the WG 210 series, integrating the clutch packs, planetary gearsets, and hydraulic control circuits into a single, ready-to-install package. As a complete unit, it eliminates the need for piecemeal component sourcing, reducing downtime during major overhauls. The SKU 4657.055.323 is a direct OEM replacement, ensuring precise fitment and original performance characteristics for ZF powershift transmissions used in loaders, dozers, and material handlers.
Symptoms of Failure
When the ZF 4657.055.323 assembly begins to fail, operators typically notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh shifting: The transmission hesitates before engaging gears or slams into gear, indicating internal wear on clutch packs or valve bodies within the assembly.
- Low hydraulic pressure and slipping: A drop in system pressure causes the transmission to slip under load, especially during directional changes, often accompanied by a burning clutch smell.
- External oil leaks at the front housing: Leaks frequently originate from the HOUS.FRONT SECT interface, where degraded seals or gaskets allow transmission fluid to escape.
- Unusual noise during operation: Grinding or whining sounds from the transmission case suggest bearing failure or gear damage within the complete unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.055.323 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 |
| Estimated Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-Grade Cast Iron |
| OEM Reference | ZF 4657.055.323 |
| Torque Capacity | 2100 Nm (estimated) |
Compatibility
This complete unit is specifically engineered for the ZF WG 210 series powershift transmissions. Based on its design and part number structure, the 4657.055.323 assembly is compatible with the following ZF transmission models: WG 180, WG 200, WG 210, and WG 220. It is commonly found in construction equipment such as wheel loaders, backhoe loaders, and telescopic handlers from manufacturers like Liebherr, Volvo, and JCB. For proper installation, ensure the 螺栓 (mounting bolts) are torqued to specification, and always replace the O-RING at the housing interface to prevent leaks. The CYLINDRICAL PIN must be aligned correctly to secure the assembly during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section that encloses the clutch packs |
| 0636115293 | 螺栓 | Mounting bolt for securing housing sections |
| 0634313603 | O-RING | Seal preventing fluid leaks at joints |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise assembly positioning |
| 0636100801 | CAP SCREW | Fastener for cover plates and flanges |
| 4656301148 | FIXING PLATE | Retains internal components in position |
| 4657301032 | SCREEN SHEET | Filter screen for hydraulic oil circuit |
| 4657301033 | SCREEN SHEET | Secondary filter screen for oil return |
| 0636100803 | CAP SCREW | High-strength screw for critical joints |
| 4656301047 | OIL FEED.HOUSG. | Housing for oil feed channels |
