Overview
The ZF 4657.055.139 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty industrial and agricultural machinery. As the core power transfer module in the WG 210 series, this assembly integrates all rotating clutches, planetary gear sets, and hydraulic control components into a single, ready-to-install package. The SKU 4657.055.139 denotes a fully assembled 5-speed powershift transmission, eliminating the need for piecemeal rebuilding. It sits directly between the engine flywheel and the final drive, managing torque distribution across five forward gears. For proper mounting, this unit requires a robust 4657101075: TRANSMISSION HOUSING to secure the main shaft assembly and align the internal oil galleries.
Symptoms of Failure
- Erratic gear engagement under load: When the internal clutch packs wear, operators experience delayed or harsh shifting, particularly when moving from neutral to forward or reverse. This often manifests as a “clunk” or momentary loss of drive power.
- Persistent hydraulic oil leaks near the bell housing: Cracks or fatigue in the main casing allow transmission fluid to seep past seals. You may notice puddles forming under the vehicle after extended operation, indicating compromised housing integrity.
- Unusual whining or grinding noises in 3rd and 4th gears: Worn planetary bearings or damaged sun gears produce a high-pitched metallic sound that intensifies with engine RPM. This symptom often precedes catastrophic gear failure if ignored.
- Inability to hold position on inclines: A failing spool valve or worn clutch piston causes the transmission to slip out of gear when stationary on a slope, requiring constant brake application to prevent rollback.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.055.139 |
| Transmission Series | WG 210 (5-speed powershift) |
| Overall Length (approx.) | 680 mm |
| Dry Weight (approx.) | 195 kg |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 5 WG 210 |
| Max Input Torque | 1,200 Nm |
| Oil Capacity (system) | 14.5 liters |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but its core architecture is shared with several other ZF powershift models. It is directly compatible with WG 180 and WG 200 transmissions that use the same 5-speed planetary layout, provided the 4657201151: HOUS.FRONT SECT and 4657201160: HOUSING REAR PART are also replaced to match the updated bolt pattern. Additionally, it fits select WG 250 variants when used with the correct 0631306816: CYLINDRICAL PIN for dowel alignment. Always verify your existing transmission model code before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101075 | TRANSMISSION HOUSING | Main structural casing for shaft support |
| 4657201151 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4657201160 | HOUSING REAR PART | Rear section covering output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0636100801 | CAP SCREW | Fastener for housing flange |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 4657301032 | SCREEN SHEET | Oil filter mesh (fine) |
| 4657301033 | SCREEN SHEET | Oil filter mesh (coarse) |
| 0636100803 | CAP SCREW | Fastener for valve body |
| 0750301003 | OIL FEED.HOUSG. | Pressurized oil supply tube |
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