Overview
The ZF 4657.055.318 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single ready-to-install package. As the core of the WG 210 series, it manages torque distribution across five forward speeds, ensuring smooth power delivery under load. The SKU 4657.055.318 identifies this specific assembly variant, which is critical for maintaining OEM performance standards in loaders, graders, and industrial tractors. When replacing this unit, technicians must also inspect the 4657101085: TRANSMISSION HOUSING for cracks or wear, as it provides the structural foundation for the entire assembly.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the assembly cause delayed shifts or loss of torque, particularly in higher gears.
- External oil leaks at housing joints: Gasket failure between the 4657201161: HOUS.FRONT SECT and the main casing leads to visible drips, reducing hydraulic pressure.
- Metallic grinding noise during operation: Bearing fatigue or gear tooth spalling generates audible debris, often accompanied by contamination in the oil filter.
- Overheating and sluggish response: Internal wear increases friction, causing the transmission to run hot and hesitate during direction changes.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (dry) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.055.318 |
| Torque Capacity | 2100 Nm (peak) |
| Fluid Capacity | 14.5 liters (ZF EcoFluid M-1) |
| Compatible Fasteners | 0636100801: CAP SCREW (M12 x 1.5 x 40) |
| Sealing Hardware | 0636100803: CAP SCREW (M10 x 1.25 x 30) |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture shares mounting patterns with earlier WG 180 and WG 200 models. It directly replaces units in WG 210-5 and WG 210-6 variants used in Volvo L120G, Caterpillar 950H, and Case 921E wheel loaders. For proper fitment, verify the rear housing configuration; the 4657201162: HOUSING REAR PART and 4657298107: HOUSING REAR SECTION must match the original PTO arrangement. Always cross-reference the transmission serial number against ZF’s application guide before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4657201161 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201162 | HOUSING REAR PART | Rear section supporting output shaft and parking brake |
| 4657298107 | HOUSING REAR SECTION | Extended rear housing for PTO or dropbox adapters |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M12 bolt securing housing to bell housing |
| 4656301148 | FIXING PLATE | Locking plate for clutch piston retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil pump suction |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump return line |
| 0636100803 | CAP SCREW | M10 bolt for valve body and cover plates |
