Overview
The ZF 4657.056.077 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control elements into a single ready-to-install package. As the core rotating assembly of the WG 210 series, it transfers engine torque through six forward speeds and one reverse range. The SKU 4657.056.077 is a direct OEM replacement, ensuring precise fitment within the transmission housing. When rebuilding a ZF powershift, this complete unit eliminates the need to source individual gears and shafts separately, reducing downtime for equipment such as wheel loaders, forklifts, and telehandlers.
Symptoms of Failure
- Delayed or harsh gear engagement: When the assembly wears, hydraulic pressure drops cause a noticeable lag between shifting and power delivery, often accompanied by a jarring clunk.
- Intermittent gear slipping under load: Worn clutch discs or damaged planetary gears within the assembly lead to RPM flare without corresponding vehicle speed, especially on inclines.
- Metallic grinding noise from the bell housing: Bearing failure or gear tooth chipping produces a distinct high-pitched whine or grinding sound that worsens as oil temperature rises.
- External oil seepage at the housing joint: Fatigue cracks or seal degradation in the assembly allow ATF to weep past the TRANSMISSION HOUSING interface, leaving visible drips under the machine.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.056.077 |
| Assembly Type | 6 WG 210 Powershift (Complete Unit) |
| Overall Length | 485 mm (19.1 in) |
| Dry Weight | 68 kg (150 lb) |
| Housing Material | Cast Iron (GGG-40) |
| Clutch Disc Material | Sintered Bronze on Steel |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| OEM Reference | ZF 4657 056 077 |
| Related Fastener | 0636100801: CAP SCREW |
| Related Fastener | 0636100803: CAP SCREW |
| Related Plate | 4656301148: FIXING PLATE |
| Related Screen | 4657301034: SCREEN SHEET |
| Related Screen | 4657301035: SCREEN SHEET |
| Oil Feed Component | 4656301048: OIL FEED.HOUSG. |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with models WG 180, WG 200, and WG 210 used in construction and agricultural equipment. The assembly interfaces with the HOUS.FRONT SECT and the HOUSING REAR PART to form the complete transmission case. A CYLINDRICAL PIN is required to align the assembly during installation. Always verify your transmission serial number against the ZF parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Encloses the gear assembly and supports bearings |
| 4657201028 | HOUS.FRONT SECT | Front section of the transmission case |
| 4657201013 | HOUSING REAR PART | Rear section of the transmission case |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | Fastens housing sections together |
| 0636100803 | CAP SCREW | Secures oil feed components |
| 4656301148 | FIXING PLATE | Locks clutch pack retainers |
| 4657301034 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 4656301048 | OIL FEED.HOUSG. | Distributes pressurized oil to clutches |
