Overview
The ZF 4657.066.032 6 WG 211 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As the core power transfer module in the WG 211 series, it replaces the entire rotating assembly and valve body section. The SKU 4657.066.032 is a direct OEM-specification unit, ensuring precise fitment and shift quality. This assembly sits between the TRANSMISSION HOUSING and the HOUSING REAR PART, forming the central structural and mechanical core of the transmission.
Symptoms of Failure
When the ZF 4657.066.032 assembly begins to fail, operators typically notice these specific issues:
- Delayed or harsh engagement: The transmission hesitates before engaging forward or reverse, followed by a jarring shift. This indicates worn clutch plates or degraded seals within the assembly.
- Intermittent gear slipping under load: The unit loses torque transfer when climbing or pushing, causing the engine to rev without proportional vehicle movement. This is a classic sign of internal pressure loss or worn friction discs.
- Contaminated transmission fluid with metallic debris: Oil samples show bronze or steel particles, signaling bearing or gear wear inside the assembly. This often accompanies a whining noise from the bell housing area.
- External oil seepage at the housing joint: Fluid leaks between the assembly and the HOUS.FRONT SECT indicate a failed gasket or cracked casting, requiring immediate replacement to avoid total loss of lubrication.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4657.066.032 |
| Assembly Type | 6-Speed Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.066.032 |
| Mounting Hardware Required | CAP SCREW (0636102489) x 8 |
| Alignment Component | CYLINDRICAL PIN (0631306816) x 2 |
| Sealing Plate | FIXING PLATE (4656301148) |
Compatibility
This complete unit is engineered for the ZF WG 211 series of powershift transmissions. It is directly compatible with the following ZF models: WG 211, WG 180 (with adapter kit), WG 200, and WG 250 (early production). The assembly is also a direct fit for ZF 6 WG 211 variants used in telehandlers, wheel loaders, and industrial tractors. Always verify the serial number against your existing TRANSMISSION HOUSING to confirm compatibility before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657301130 | HOUS.FRONT SECT | Front section housing the input shaft |
| 4657301131 | HOUSING REAR PART | Rear section enclosing the output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise assembly |
| 0636102489 | CAP SCREW | High-tensile bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks the assembly to the housing |
| 0636102463 | CAP SCREW | Secondary bolt for rear housing |
| 4657201133 | SCREEN SHEET | Oil filter screen for debris protection |
| 0636115287 | CAP SCREW | Bolt for screen sheet retention |
| 4657301065 | PLATE | Spacer plate for clutch pack adjustment |
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