Overview
The ZF 4657.056.123 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the planetary gear sets, clutch packs, and hydraulic control system into a single, pre-tested assembly. As the central power transfer module in the WG 210 Series, it converts engine torque into precisely controlled wheel or implement speed. The SKU 4657.056.123 identifies this specific complete assembly variant, which is engineered to match OEM fitment and performance standards. The unit is typically mounted between the engine bellhousing and the final drive, with the 4657101082: TRANSMISSION HOUSING providing the structural backbone for all internal components.
Symptoms of Failure
- Delayed or harsh gear engagement: When the complete unit wears, operators often report a noticeable lag or a jarring “clunk” when shifting between forward and reverse ranges, indicating internal clutch pack wear or hydraulic pressure loss.
- Transmission overheating under load: A failing assembly can cause excessive friction, leading to high oil temperatures. This is frequently accompanied by a burnt clutch smell and reduced machine performance during heavy pushing or grading operations.
- Oil leaks at the housing joints: Cracks or warpage in the main casing can cause fluid seepage around the mating surfaces of the 4657201166: HOUS.FRONT SECT or the 4657201170: HOUSING REAR PART, leading to low oil levels and eventual gear slippage.
- Unusual whining or grinding noises: Worn bearings or damaged planetary gears within the assembly produce distinct metallic sounds, particularly when the transmission is under load or during deceleration.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.056.123 |
| Assembly Type | Complete Powershift Unit |
| Series | WG 210 |
| Estimated Dry Weight | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-Grade Cast Iron |
| OEM Reference | ZF 6 WG 210 |
| Bolt Torque (Main Housing) | 120 Nm (refer to manual) |
Compatibility
This complete assembly is specifically designed for the ZF WG 210 Series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG210 variants used in construction equipment such as wheel loaders, telehandlers, and graders. The unit also integrates with the 4657298102: HOUSING REAR SECTION for final drive attachment. Always verify your transmission serial number against the ZF parts catalog to ensure correct fitment for your specific machine model.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201170 | HOUSING REAR PART | Rear casing for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Secures internal clutch packs |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | High-tensile bolt for rear housing |
