Overview
The ZF 4657.056.080 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in solution designed for heavy-duty off-highway machinery. This complete assembly houses the core planetary gear sets, clutch packs, and hydraulic control valving required for seamless power delivery in ZF’s WG 210 series. As a complete unit, it eliminates the need for piecemeal rebuilding, ensuring factory-specified tolerances and oil flow dynamics. The SKU 4657.056.080 is the direct replacement for the original equipment assembly, incorporating all internal shafts and bearings. It mounts directly to the TRANSMISSION HOUSING and interfaces with the HOUS.FRONT SECT to form the main structural envelope of the gearbox.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or sprag clutches wear, the assembly fails to hold torque, causing the machine to lose power during digging or pushing operations.
- External oil leaks at the housing seam: Cracks or warpage in the main casing allow transmission fluid to weep, often visible as drips near the bell housing or rear output flange.
- Metallic grinding noise during directional shifts: Worn bearings or damaged planetary gears produce a distinct chatter, especially when shifting from forward to reverse under load.
- Delayed or harsh shifting: Hydraulic pressure loss due to internal seal failure within the assembly leads to sluggish clutch application or sudden engagement.
Technical Specifications
| Parameter | Specification |
|---|---|
| Assembly Weight | Approx. 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.080 |
| Max Input Torque | 2,100 Nm |
| Wet Weight (with oil) | Approx. 210 kg |
Compatibility
This complete unit is engineered specifically for the ZF WG 210 transmission series. It is also mechanically compatible with the WG 180 and WG 200 series when used with the appropriate adapter plate, though the clutch pack count differs. The assembly is commonly found in Case IH Steiger and New Holland TJ series tractors, as well as Volvo L220 wheel loaders. For proper sealing, always install a new CYLINDRICAL PIN at the dowel locations and verify the HOUSING REAR PART is free of scoring before final assembly.
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 pump drive |
| 4657201012 | HOUSING REAR PART | Rear section supporting output shaft and PTO |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M16 bolt for housing flange clamping |
| 4656301148 | FIXING PLATE | Locks bearing preload in rear housing |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction side |
| 0636100803 | CAP SCREW | M12 bolt for valve body attachment |
| 4681301040 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
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