Overview
This ZF 4657.064.007 4 WG 211 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway applications. As the core power distribution module in the WG 211 series, this assembly integrates the main drive shaft, clutch packs, and valve body to deliver seamless gear shifts under high torque loads. The SKU 4657.064.007 replaces worn or failed complete units, restoring original ZF performance in loaders, graders, and industrial tractors. It sits directly between the engine bell housing and the final drive, managing power flow through four forward and three reverse speeds.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4657.064.007 assembly wears, operators experience a noticeable lag or a jarring clunk when shifting between forward and reverse, indicating internal clutch pack wear.
- Transmission overheating and fluid discoloration: A failing unit often causes the oil to turn dark or smell burnt due to excessive friction between worn plates, leading to thermal breakdown.
- Intermittent loss of drive under load: The machine may suddenly lose pulling power on inclines or when carrying heavy loads, a classic sign of hydraulic pressure loss within the assembly.
- External oil seepage from housing joints: Cracks or gasket failures in the unit allow transmission fluid to leak, leaving visible puddles under the chassis and requiring frequent top-offs.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.064.007 |
| Series | WG 211 |
| Type | Powershift Transmission Assembly (Complete Unit) |
| Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4 WG 211 |
| Number of Speeds | 4 Forward / 3 Reverse |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Fluid Capacity | 12.5 liters (3.3 gallons) |
Compatibility
This complete unit is engineered specifically for the ZF WG 211 series, but it also shares mounting patterns and hydraulic interfaces with earlier WG 180 and WG 200 models used in construction equipment. It is a direct fit for ZF 4 WG 211 transmissions found in Volvo L70, Caterpillar 924, and JCB 456 wheel loaders. For proper installation, this assembly must be paired with a matching TRANSMISSION HOUSING (4657101049) to ensure correct alignment. The front section requires the HOUS.FRONT SECT (4657301130), while the rear is sealed by the HOUSING REAR PART (4657301131). A CYLINDRICAL PIN (0631306816) is also required for precise dowel alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and clutch packs. |
| 4657301130 | HOUS.FRONT SECT | Front section housing that supports the input shaft and pump drive. |
| 4657301131 | HOUSING REAR PART | Rear section housing that covers the output shaft and PTO interface. |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for precise alignment between housing sections. |
| 0636102489 | CAP SCREW | Fastener for securing the housing to the bell housing. |
| 4656301148 | FIXING PLATE | Locking plate that prevents fastener loosening under vibration. |
| 0636102463 | CAP SCREW | Bolt used for attaching the valve body to the housing. |
| 4657201133 | SCREEN SHEET | Filter screen that protects the hydraulic system from debris. |
| 0636115287 | CAP SCREW | High-tensile bolt for final drive flange attachment. |
| 4657301065 | PLATE | Wear plate that protects the housing from clutch pack friction. |
Frequently Asked Questions
Q: Can the 4657.064.007 assembly be rebuilt, or must it be replaced as a complete unit?
A: While individual clutch packs and seals inside this assembly are serviceable, ZF recommends replacing the complete unit when internal wear is extensive, as the housing and valve body often suffer fatigue cracks that are not repairable in the field.
Q: What is the typical lifespan of this ZF 4 WG 211 transmission assembly?
A: Under normal operating conditions with proper fluid changes every 1,000 hours, this assembly can last 8,000 to 12,000 hours. Heavy loading or contaminated oil will significantly reduce this lifespan.
Q: Does this part include the torque converter?
A: No, the 4657.064.007 is the transmission assembly only. The torque converter is a separate component that must be ordered independently for your specific engine model.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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