Overview
The ZF 4657.056.073 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly serves as the core power transfer module within the WG 210 series, integrating the torque converter, planetary gear sets, and clutch packs into a single, pre-assembled package. The SKU 4657.056.073 is a direct replacement for worn or failed assemblies, ensuring minimal downtime for equipment such as loaders, graders, and industrial tractors. It interfaces directly with the TRANSMISSION HOUSING to form the main structural shell, while the HOUS.FRONT SECT and HOUSING REAR PART enclose the rotating components.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or seals degrade, the transmission fails to hold torque, causing delayed shifts or complete loss of drive in specific ranges.
- External oil leaks at housing joints: Worn gaskets or cracked castings around the TRANSMISSION HOUSING or rear cover allow hydraulic fluid to escape, leading to low oil pressure and overheating.
- Abnormal whining or grinding noises: Bearing failure or gear tooth damage within the assembly produces metallic sounds, particularly during directional changes or under heavy throttle.
- Intermittent neutral condition: A failing valve body or worn CYLINDRICAL PIN can cause the transmission to unexpectedly drop out of gear, creating a safety hazard in operation.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.073 |
| Assembly Type | Complete Powershift Transmission |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 560 mm |
| Housing Material | High-strength cast iron |
| Number of Speeds | 6 forward / 3 reverse |
| Max Input Torque | 2100 Nm |
| OEM Reference | ZF WG 210 |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also serves as a direct upgrade or replacement for earlier WG 180 and WG 200 models when paired with the correct HOUSING REAR PART. It is commonly found in:
- ZF WG 180 (with adapter modifications)
- ZF WG 200 (direct fit)
- ZF WG 210 (primary application)
- ZF WG 220 (limited compatibility with specific bellhousing configurations)
Always verify the CYLINDRICAL PIN alignment and the HOUS.FRONT SECT interface before installation to ensure proper oil gallery sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201012 | HOUSING REAR PART | Rear cover supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly |
| 4657301032 | SCREEN SHEET | Filter screen for oil circuit |
| 4657301033 | SCREEN SHEET | Secondary filter screen |
| 0636100803 | CAP SCREW | Bolt for rear housing |
| 4681301040 | OIL FEED.HOUSG. | Distributes hydraulic fluid to clutches |
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