Overview
The ZF 4657.056.081 6 WG 210 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway machinery. This assembly serves as the central power distribution hub within the WG 210 series, converting engine torque into precise, multi-speed output for wheel loaders, dozers, and graders. The SKU 4657.056.081 integrates the main gear cluster, clutch packs, and hydraulic control passages into a single, ready-to-install package. For optimal structural integrity, this assembly mounts directly to the TRANSMISSION HOUSING and interfaces with the HOUS.FRONT SECT to ensure precise alignment of rotating components.
Symptoms of Failure
- Erratic gear engagement under load: When the internal clutch drum or planetary carrier wears, operators experience delayed or harsh shifting, particularly during reversing maneuvers.
- Low hydraulic pressure warnings: A failing complete unit often causes internal leakage, triggering dashboard pressure alerts and reducing torque converter lockup efficiency.
- Metallic grinding noise from the bell housing: Worn bearings or damaged gear teeth produce a distinct whining or grinding sound, especially in lower gears.
- External oil seepage at the rear seal: Cracks in the HOUSING REAR PART or degraded gaskets lead to fluid loss, visible as drips under the transmission pan.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.081 |
| Assembly Type | 6-Speed Powershift, Complete Unit |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Max Input Torque | 2,100 Nm |
| OEM Reference | ZF 6 WG 210 |
| Mounting Hardware | Includes CAP SCREW (M16) and CYLINDRICAL PIN for alignment |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also fits select WG 180 and WG 200 variants with identical bell housing patterns. It is a direct replacement for transmissions used in Volvo L120G, Caterpillar 950H, and Komatsu WA380 wheel loaders. The assembly requires the FIXING PLATE for secure mounting and the SCREEN SHEET (inner) and SCREEN SHEET (outer) for filtration. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101039 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201013 | HOUSING REAR PART | Rear cover with output flange support |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | M16 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining ring |
| 4657301034 | SCREEN SHEET | Inner oil filter mesh |
| 4657301035 | SCREEN SHEET | Outer oil filter mesh |
| 0636100803 | CAP SCREW | M12 bolt for valve body attachment |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil distribution manifold |
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