Overview
The ZF 4657.056.146 6 WG 210 Powershift Transmission Assembly is a complete, factory-grade unit engineered for heavy-duty off-highway applications. This fully assembled transmission integrates the main gear cluster, clutch packs, and hydraulic control system within a single robust housing. As a direct replacement for the SKU 4657.056.146, it serves as the central power distribution module in the WG 210 series, converting engine torque into precise, shiftable output for wheel loaders, graders, and industrial tractors. The assembly is designed to interface seamlessly with the TRANSMISSION HOUSING, which encloses the rotating components and maintains oil circulation under high load.
Symptoms of Failure
When the ZF 4657.056.146 assembly begins to degrade, operators typically notice these specific failure modes:
- Delayed or harsh engagement – A noticeable lag when shifting from forward to reverse, often accompanied by a metallic clunk, indicating worn clutch discs or hydraulic pressure loss.
- Oil leaks at the housing interface – Fluid seepage around the joint between the main assembly and the HOUS.FRONT SECT or the HOUSING REAR PART, signaling gasket failure or cracked casting.
- Gear slipping under load – The transmission momentarily loses torque during uphill travel or heavy digging, often accompanied by a rising engine RPM without corresponding vehicle speed.
- Unusual whining or grinding noise – Persistent high-pitched sounds from the gear train, particularly in lower ranges, suggesting bearing fatigue or debris contamination in the oil sump.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.146 |
| Assembly Type | 6-Speed Powershift (WG 210) |
| Overall Length | 820 mm (estimated) |
| Dry Weight | 285 kg (estimated) |
| Housing Material | High-grade cast iron (GGG-40) |
| Max Input Torque | 2100 Nm |
| Oil Capacity | 22 liters (SAE 10W-30) |
| Mounting Configuration | SAE 3 bellhousing pattern |
Compatibility
This complete unit is specifically designed for the ZF WG 210 series transmissions. It is directly compatible with the following ZF models and their derivatives:
- ZF WG 210 (all variants, including 6 WG 210)
- ZF WG 180 (with adapter modifications for the HOUSING REAR SECTION)
- ZF WG 200 (common in older wheel loaders)
- ZF WG 211 (limited production models)
Always verify the rear housing configuration; the 4657.056.146 assembly requires the matching HOUS.FRONT SECT and HOUSING REAR PART for proper sealing and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101079 | TRANSMISSION HOUSING | Main structural enclosure for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft and pump drive |
| 4657201169 | HOUSING REAR PART | Rear section housing for output shaft and PTO |
| 4657298104 | HOUSING REAR SECTION | Alternate rear housing for extended wheelbase models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing doweling |
| 0636100801 | CAP SCREW | M16 bolt for housing flange fastening |
| 4656301148 | FIXING PLATE | Retainer plate for clutch pack assembly |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil return line |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for suction line |
| 0636100803 | CAP SCREW | M12 bolt for valve body mounting |
