Overview
The ZF 4657.056.112 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty off-highway applications. This complete assembly incorporates the main gear cluster, clutch packs, and hydraulic control system within a single sealed unit. The SKU 4657.056.112 designates the 6-speed configuration for the WG 210 series, designed to handle torque loads up to 2,100 Nm. It sits directly between the engine flywheel housing and the final drive, serving as the primary power modulation and gear reduction center. For structural integrity, this unit is paired with a TRANSMISSION HOUSING that encloses the rotating components, while the HOUS.FRONT SECT provides the forward bearing support and oil gallery routing.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to forward: Worn clutch piston seals inside the 4657.056.112 cause pressure loss, resulting in a 2-3 second lag before the gear engages.
- Constant oil seepage from the bell housing weep hole: A cracked or warped HOUSING REAR PART allows transmission fluid to bypass the main seal, leaving puddles under the vehicle.
- Gear slipping under moderate load (e.g., climbing a 15% grade): Internal wear on the 6 WG 210’s sprag clutches reduces torque holding capacity, causing the transmission to drop out of gear without warning.
- Abnormal whining noise in 4th and 5th gears: Bearing fatigue within the complete unit creates a high-pitched metallic sound that increases with engine RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.056.112 |
| Assembly Type | 6 WG 210 Powershift (Complete Unit) |
| Overall Length | 785 mm (30.9 in) |
| Dry Weight | 285 kg (628 lbs) |
| Housing Material | Cast Iron EN-GJS-500-7 |
| Max Input Torque | 2,100 Nm |
| OEM Reference | ZF 4657.056.112 |
| Bolt Torque (Housing) | 120 Nm + 90° |
Compatibility
This complete unit is engineered for the WG 210 series but shares its mounting footprint and hydraulic interface with earlier WG 180 and WG 200 models. It directly replaces units in ZF 6WG210, 6WG200, and 6WG180 transmissions used in loaders, graders, and industrial tractors. The assembly requires the HOUSING REAR SECTION for proper output flange alignment on 6WG210 variants. For 6WG180 applications, verify the rear housing bolt pattern matches the HOUSING REAR PART dimensions.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural enclosure for gear train |
| 4657201167 | HOUS.FRONT SECT | Forward bearing carrier and oil feed |
| 4657201171 | HOUSING REAR PART | Rear seal and output bearing support |
| 4657298103 | HOUSING REAR SECTION | Output flange adapter for 6WG210 |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M12 x 1.5 housing fastener |
| 4656301148 | FIXING PLATE | Locks cap screws in position |
| 4657301034 | SCREEN SHEET | Fine mesh oil filter (inner) |
| 4657301035 | SCREEN SHEET | Coarse mesh oil filter (outer) |
| 0636100803 | CAP SCREW | M10 x 1.25 accessory bolt |
