Overview
The ZF 4657.056.158 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the main drive housing, clutch packs, and hydraulic control elements into a single, pre-tested assembly. As the central power transfer component in the WG 210 series, it directly replaces worn or failed transmissions to restore machine performance. The SKU 4657.056.158 identifies this as a complete assembly, ensuring you receive every internal component required for a direct swap. When installing this unit, always verify the integrity of the surrounding structure; a damaged TRANSMISSION HOUSING can compromise alignment and lead to premature failure.
Symptoms of Failure
- Delayed or harsh gear engagement: If the transmission hesitates before shifting or slams into gear, internal clutch packs or hydraulic seals within the 4657.056.158 assembly may be worn.
- Progressive oil leaks at the bell housing: A failing unit often weeps transmission fluid from the front or rear seal areas, leaving puddles under the vehicle.
- Torque converter shudder under load: When the assembly loses hydraulic pressure, you may feel a vibration or slipping sensation during acceleration.
- Metal debris in the oil pan: Worn bearings or gear teeth produce metallic particles, indicating internal damage that requires a complete unit replacement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.158 |
| Assembly Type | Complete Powershift Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| OEM Reference | ZF WG 210 |
| Max Input Torque | 1,200 Nm |
| Number of Speeds | 6 Forward / 3 Reverse |
Compatibility
This complete assembly is engineered for the ZF WG 210 series, but its core architecture is shared with the WG 180 and WG 200 families. It directly fits models such as the WG 210-6, WG 210-8, and WG 210-10 used in loaders, graders, and industrial tractors. The unit also cross-references with certain ZF Ergopower variants that utilize the same bell housing pattern. For a secure installation, pair this assembly with a new HOUS.FRONT SECT and HOUSING REAR PART to ensure proper alignment. Additionally, the CYLINDRICAL PIN is critical for dowel alignment during assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101063 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4657201151 | HOUS.FRONT SECT | Front section housing the input shaft |
| 4657201160 | HOUSING REAR PART | Rear section supporting output bearings |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Retains clutch pack assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | High-strength bolt for bell housing |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutches |
