Overview
The ZF 4657.056.189 6 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 train, clutch packs, and hydraulic control system within a single robust casing. As the central power transfer component in the WG 210 series, it manages torque distribution across six forward speeds and one reverse. The SKU 4657.056.189 denotes a factory-spec assembly, ensuring precise alignment of internal shafts and bearings. For structural integrity, this unit mates directly with the 4657101082: TRANSMISSION HOUSING, which encloses the rotating elements. The front section is sealed by the 4657201166: HOUS.FRONT SECT, while the 4657201170: HOUSING REAR PART and 4657298102: HOUSING REAR SECTION complete the rear enclosure, forming a sealed oil bath for all moving components.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn clutch packs or hydraulic valve bodies within the assembly cause a noticeable lag when shifting from neutral to drive, often accompanied by a jarring clunk. This is a primary indicator of internal wear on the 4657.056.189 unit.
- Progressive oil leaks at housing seams: Degraded gaskets or micro-cracks in the casing lead to fluid seepage around the mating surfaces of the front and rear sections. Operators may spot drips under the bell housing or near the output flange.
- Intermittent gear slipping under load: When the transmission loses torque hold during uphill travel or heavy hauling, it indicates worn friction discs or a failing torque converter lock-up clutch inside the complete assembly.
- Unusual whining or grinding noises: Bearing fatigue or gear tooth pitting produces a high-pitched whine that increases with engine RPM, signaling imminent internal failure of the 4657.056.189 unit.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.189 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 210 |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron |
| Input Spline Count | 21 (SAE standard) |
| Oil Capacity | 18.5 liters (ZF TE-ML 03 spec) |
| OEM Reference | ZF 6 WG 210 |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models including the WG 180, WG 200, and WG 210 variants used in wheel loaders, telehandlers, and industrial tractors. The assembly also fits select WG 150 and WG 250 platforms when paired with the correct adapter housing. Always verify the bell housing pattern and output flange configuration against your specific machine’s serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing enclosing the gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4657201170 | HOUSING REAR PART | Rear casing supporting the output shaft and PTO |
| 4657298102 | HOUSING REAR SECTION | Extended rear section for additional gear support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636100801 | CAP SCREW | Fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locking plate for bearing retention |
| 4657301032 | SCREEN SHEET | Oil filter screen for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Secondary oil filter screen |
| 0636100803 | CAP SCREW | High-tensile bolt for clutch pack assembly |
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