Overview
The ZF 4657.056.156 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As the core power transfer module in the WG 210 series, it converts engine torque into controlled, multi-speed output for wheel loaders, graders, and material handlers. The SKU 4657.056.156 replaces worn or failed assemblies, restoring full shift quality and load-holding capability. This unit mounts directly to the 4657101080: TRANSMISSION HOUSING, which provides the structural foundation for the entire drivetrain.
Symptoms of Failure
- Delayed or harsh engagement – When the assembly wears, internal clutch packs slip, causing a noticeable lag between gear selection and actual movement, especially under load.
- Intermittent loss of drive in forward gears – Worn seals or scored clutch plates within the 4657.056.156 can cause pressure loss, leading to sudden neutral conditions during operation.
- Contaminated transmission oil with metallic debris – Internal wear generates fine metal particles that appear on the dipstick or in the filter, indicating imminent assembly failure.
- Audible whining or grinding from the bell housing area – Bearing fatigue or gear tooth damage inside the assembly produces distinct noise that worsens with higher RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.156 |
| Assembly Type | 6 WG 210 Powershift Transmission (Complete Unit) |
| Dry 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) |
| Clutch Plate Material | Sintered bronze on steel |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 1320 301 001 |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also directly fits WG 180 and WG 200 variants when used with the correct adapter components. The assembly is a direct replacement for transmissions in Volvo L120, L150, and L180 wheel loaders, as well as Caterpillar 950 and 962 models that originally specified the ZF 6 WG 210. For proper installation, ensure the 4657201167: HOUS.FRONT SECT and 4657201171: HOUSING REAR PART are inspected for wear. In some configurations, the 4657298103: HOUSING REAR SECTION is required to complete the rear seal interface.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for the transmission assembly |
| 4657201167 | HOUS.FRONT SECT | Front section housing for input shaft and pump drive |
| 4657201171 | HOUSING REAR PART | Rear housing section supporting output shaft bearings |
| 4657298103 | HOUSING REAR SECTION | Alternate rear housing for extended wheelbase applications |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing doweling during assembly |
| 0636100801 | CAP SCREW | M12 x 1.5 bolt for securing housing flanges |
| 4656301148 | FIXING PLATE | Locking plate for clutch pack retention |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit protection |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump return line |
| 0636100803 | CAP SCREW | M10 x 1.25 bolt for valve body mounting |
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