Overview
The ZF 4657.055.320 5 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox designed for heavy-duty off-highway applications. This complete unit integrates the main drive housing, clutch packs, and planetary gear sets to deliver reliable power distribution in construction and agricultural machinery. As a core assembly, it replaces the entire transmission core, ensuring seamless operation when paired with the correct TRANSMISSION HOUSING. The SKU 4657.055.320 is a direct OEM reference for ZF’s WG 210 series, providing a factory-matched solution for rebuilds or retrofits.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn internal clutches or valve body issues cause the transmission to hesitate or lose torque during operation, especially in low-range gears.
- External oil leaks at housing seams: Degraded gaskets or cracks in the HOUS.FRONT SECT or HOUSING REAR PART lead to fluid loss, reducing lubrication and cooling efficiency.
- Unusual grinding or whining noises: Bearing fatigue or gear tooth damage inside the assembly produces metallic sounds that intensify with speed changes.
- Delayed or harsh shifting: Contaminated hydraulic fluid or failing solenoids cause abrupt gear changes, often accompanied by a lurching motion.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.055.320 |
| Series | WG 210 (5-speed powershift) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | Cast iron (GGG-40) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 560 mm |
| Max Input Torque | 1,200 Nm |
| Fluid Capacity | 18 L (SAE 10W-30) |
| OEM Reference | ZF 5 WG 210 |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also fits select variants of the WG 180, WG 200, and WG 250 families when using the correct adapter plates. It is commonly found in loaders, graders, and telescopic handlers from manufacturers like Case, New Holland, and JCB. For proper sealing, always inspect the HOUSING REAR SECTION for cracks before installation. The assembly is not backward-compatible with older WG 160 models without significant modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101085 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201161 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201162 | HOUSING REAR PART | Rear section enclosing output shaft and PTO |
| 4657298107 | HOUSING REAR SECTION | Alternate rear cover for specific WG 210 builds |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | M12 fastener for front housing attachment |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly within the drum |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil return line |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M14 bolt for rear housing and flange connections |
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