Overview
The ZF 4657.056.317 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the clutch packs, hydraulic controls, and planetary gear sets required for seamless power delivery in wheel loaders, graders, and industrial tractors. As a direct replacement for the WG 210 series, the SKU 4657.056.317 ensures precise shift timing and torque management. During installation, the HOUS.FRONT SECT (4657201161) must be aligned correctly to maintain oil gallery integrity, while the 螺栓 (0636115293) secures the housing to the bellhousing. A fresh O-RING (0634313603) is mandatory at every hydraulic connection to prevent pressure loss, and the CYLINDRICAL PIN (0631306816) ensures precise dowel alignment between the main case and the clutch drum.
Symptoms of Failure
- Delayed or harsh engagement between forward and reverse: When the 6 WG 210 assembly loses internal seal integrity, hydraulic pressure drops, causing a 2-3 second lag before gear engagement. This often accompanies a loud clunk as clutches slam together.
- Transmission overheating under light load: Worn thrust washers or scored clutch plates generate excess friction. Operators may notice the temperature gauge climbing above 120°C during normal grading or loading cycles.
- Oil leaks at the front housing interface: Cracks in the main case or degraded O-rings allow ATF to weep from the joint between the bellhousing and the transmission. Puddles under the torque converter area are a clear indicator.
- Intermittent gear slipping during uphill operation: As the clutch packs lose clamping force, the transmission may momentarily lose power delivery when the machine encounters a grade, often accompanied by a whining noise from the pump.
Technical Specifications
| Parameter | Specification |
|---|---|
| Assembly Weight | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| Clutch Plate Material | Sintered Bronze on Steel |
| Max Input Torque | 2,100 Nm |
| OEM Reference | ZF 4657.056.317 |
| Fluid Capacity | 28 liters (ZF EcoFluid M-2) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with the WG 180, WG 200, and WG 210 models found in Volvo L120/L150 wheel loaders, Caterpillar 950/962 medium wheel loaders, and Case 921E/1021G graders. The assembly also fits select ZF 6WG-210 variants used in Terex TA400 articulated trucks. Always verify the bellhousing pattern and torque converter pilot diameter before ordering; the 4657.056.317 uses a SAE 3 flywheel housing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657201161 | HOUS.FRONT SECT | Front housing section for clutch drum alignment |
| 0636115293 | 螺栓 | Hex bolt for housing-to-bellhousing fastening |
| 0634313603 | O-RING | Hydraulic seal for oil feed passages |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for case-to-clutch drum alignment |
| 0636100801 | CAP SCREW | M12 cap screw for valve body attachment |
| 4656301148 | FIXING PLATE | Retaining plate for clutch pack springs |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for sump return line |
| 0636100803 | CAP SCREW | M10 cap screw for oil pan retention |
| 4681301040 | OIL FEED.HOUSG. | Oil feed housing for clutch lubrication |
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