Overview
The ZF 4657.055.128 5 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway applications. This complete unit integrates the main drive gears, clutch packs, and hydraulic control components within a single housing structure. As a key assembly in the WG 210 Series, it directly replaces worn or failed transmissions in wheel loaders, dozers, and material handlers. The SKU 4657.055.128 identifies this as a factory-spec complete unit, ensuring precise alignment with the original drivetrain geometry. It sits as the central power transfer module between the engine and the final drives, managing torque distribution across all forward and reverse speeds.
Symptoms of Failure
- Delayed or harsh engagement: When the complete unit wears, operators often experience a noticeable lag between shifting and actual gear engagement, followed by a jarring clunk. This indicates internal clutch pack wear or hydraulic pressure loss within the 4657.055.128 assembly.
- Transmission fluid contamination with metal debris: A failing unit will shed fine metallic particles into the oil, visible during routine drain intervals. This points to bearing or gear surface degradation inside the complete transmission.
- Intermittent power loss under load: The machine may struggle to maintain speed on inclines or during digging cycles, often accompanied by a whining noise. This symptom suggests torque converter or planetary gear set failure within the assembly.
- External oil seepage from housing joints: Leaks typically develop at the mating surfaces between the main housing and the 4657101082: TRANSMISSION HOUSING, indicating gasket fatigue or structural stress in the complete unit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.055.128 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 210 |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Primary Material | Cast Iron Housing with Steel Gears |
| OEM Reference | ZF 5 WG 210 |
| Bolt Torque Spec (Housing) | Refer to 0636100801: CAP SCREW specifications |
Compatibility
This complete unit is engineered for the ZF WG 210 Series of powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG210 variants found in articulated dump trucks, wheel loaders, and graders. The assembly also fits select WG 211 and WG 212 configurations when used with the correct 4657201166: HOUS.FRONT SECT adapter. For rear-mounted applications, verify compatibility with the 4657201170: HOUSING REAR PART or the 4657298102: HOUSING REAR SECTION to ensure proper alignment with the output shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for the complete unit |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201170 | HOUSING REAR PART | Rear casing component for output bearing retention |
| 4657298102 | HOUSING REAR SECTION | Alternate rear section for extended wheelbase models |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating surfaces |
| 0636100801 | CAP SCREW | M12 fastener for main housing assembly |
| 4656301148 | FIXING PLATE | Retaining plate for clutch pack preload |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump return |
| 0636100803 | CAP SCREW | M16 fastener for rear housing attachment |
