Overview
The ZF 4657.056.086 6 WG 210 Powershift Transmission Assembly is a complete, factory-sealed unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single drop-in replacement. As the core of the WG 210 series, it manages torque distribution across six forward speeds. The SKU 4657.056.086 is a direct OEM-specification unit, ensuring precise alignment with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity under high load cycles.
Symptoms of Failure
- Erratic gear engagement and slipping: Worn clutch discs or damaged piston seals inside the assembly cause delayed or incomplete shifts, particularly under load. Operators often report a “flare” between gears before engagement.
- Internal hydraulic pressure loss: Cracks in the HOUSING REAR PART or degraded O-rings lead to low line pressure, resulting in sluggish shifting and eventual transmission overheating.
- Metallic debris in the oil pan: Bearing spalling or gear tooth chipping generates ferrous particles. This symptom is often accompanied by a whining noise from the CYLINDRICAL PIN locations, indicating misalignment of the planetary carriers.
- External oil seepage at the bell housing: A compromised front seal or warped housing face allows ATF to weep, reducing fluid level and causing intermittent clutch slip.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.056.086 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Clutch Plate Material | Sintered bronze on steel |
| Max Input Torque | 2,100 Nm |
| Max Input Speed | 2,800 RPM |
| Fluid Capacity (assembly) | 14.5 liters |
| OEM Reference | ZF 6 WG 210 |
Compatibility
This complete assembly is engineered for the ZF WG 210 series. It is a direct fit for models including WG180, WG200, and WG210 used in telehandlers, wheel loaders, and agricultural tractors. The unit also shares mounting interfaces with the WG150 series when used with the correct adapter plate. Always verify the bell housing pattern and input shaft spline count against your existing transmission.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201027 | HOUS.FRONT SECT | Front section housing input shaft and PTO drive |
| 4657201012 | HOUSING REAR PART | Rear casing supporting output flange and parking brake |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing-to-housing fitment |
| 0636100801 | CAP SCREW | M12 bolt for securing housing sections |
| 4656301148 | FIXING PLATE | Locking plate for clutch piston retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (version A) |
| 4657301033 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (version B) |
| 0636100803 | CAP SCREW | M10 bolt for valve body attachment |
| 4681301040 | OIL FEED.HOUSG. | Oil distribution manifold for clutch lubrication |
