Overview
The ZF 4657.056.129 6 WG 210 Powershift Transmission Assembly is a complete, fully assembled unit designed for heavy-duty industrial and agricultural machinery. This core component integrates the gear train, clutch packs, and hydraulic control system within a single housing, serving as the central power distribution module for ZF’s WG 210 series. The SKU 4657.056.129 identifies this as a factory-matched assembly, ensuring precise alignment of internal shafts and bearings. It mounts directly between the engine bellhousing and the final drive, converting engine torque into multiple forward and reverse speeds. For optimal sealing and structural integrity, this assembly is paired with the 4657101079: TRANSMISSION HOUSING, which encloses the rotating components and withstands high internal pressures.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or valve body issues inside the assembly cause delayed shifts or loss of torque transfer, especially during uphill operation.
- External oil leaks near the housing seams: Cracks or gasket failure in the 4657201166: HOUS.FRONT SECT or 4657201169: HOUSING REAR PART allow hydraulic fluid to escape, leading to low pressure and overheating.
- Unusual whining or grinding noises from the transmission: Bearing fatigue or gear tooth damage within the assembly produces metallic sounds that intensify with speed changes.
- Complete loss of drive in one or more gears: Internal shaft breakage or clutch pack seizure renders the unit inoperable, often requiring immediate replacement of the entire assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (dry) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | Cast iron (GGG-40) |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 4657.056.129 |
| Fluid Capacity | 22 liters (ZF TE-ML 03) |
| Bolt Torque (housing) | 120 Nm (M12 bolts) |
Compatibility
This complete unit is engineered for the WG 210 series powershift transmissions, but it also fits select models in the WG 180 and WG 200 families due to shared mounting patterns and shaft spline dimensions. Specifically, it is compatible with ZF WG 180, WG 200, and WG 210 transmissions used in loaders, graders, and material handlers from 2010 onward. The assembly integrates with the 4657298104: HOUSING REAR SECTION to complete the rear seal interface. Always verify the serial number on your existing unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101079 | TRANSMISSION HOUSING | Main enclosure for gear train and clutches |
| 4657201166 | HOUS.FRONT SECT | Front section housing input shaft and pump drive |
| 4657201169 | HOUSING REAR PART | Rear section supporting output shaft and bearings |
| 4657298104 | HOUSING REAR SECTION | Extended rear cover for PTO interface |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | M12 bolt for securing housing sections |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic oil return |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for suction line |
| 0636100803 | CAP SCREW | M10 bolt for filter housing attachment |
