Overview
The ZF 4656.056.011 is a precision-engineered OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a critical sealing and alignment element within the transmission housing assembly, ensuring proper oil flow and pressure retention during operation. The SKU 4656.056.011 is manufactured to ZF’s exacting tolerances, making it an essential replacement for maintaining drivetrain integrity in heavy-duty commercial vehicles. When installed alongside the TRANSMISSION HOUSING (4656101032), this component helps prevent contamination and maintains structural stability under high torque loads.
Symptoms of Failure
- Oil seepage around the housing joint: When the 4656.056.011 seal degrades, you may notice fluid accumulation near the transmission bell housing, particularly after extended highway driving.
- Erratic gear engagement: A worn part can cause inconsistent hydraulic pressure, leading to delayed or harsh shifting between forward and reverse gears.
- Metallic debris in transmission fluid: Internal wear of this component may produce fine metal particles visible during routine oil changes, indicating material fatigue.
- Vibration during acceleration: Loss of structural support from a failing 4656.056.011 can transmit abnormal vibrations through the driveline, especially under load.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.056.011 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 145 mm x 95 mm x 22 mm |
| OEM Reference | ZF 4656.056.011 (Genuine) |
| Seal Type | Static lip seal with integrated spring |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 160 Series transmission, but it also fits select models in the WG 180 and WG 200 families due to shared housing architecture. The 4656.056.011 is compatible with transmissions used in municipal buses, refuse trucks, and medium-duty construction vehicles. For proper installation, ensure the mating surfaces of the HOUS.FRONT SECT (4656201075) and HOUSING REAR PART (4656201034) are clean and free of burrs. In some WG 160 variants, this part also interfaces with the HOUSING REAR PART (4472239177) for additional sealing support.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201034 | HOUSING REAR PART | Rear housing section for output shaft |
| 4472239177 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100817 | CAP SCREW | Fastener for securing housing sections |
| 4656301016 | SCREEN SHEET | Filter mesh for oil intake |
| 4656301017 | SCREEN SHEET | Secondary filter mesh |
| 0636100803 | CAP SCREW | Bolt for oil pan attachment |
| 4681301040 | OIL FEED.HOUSG. | Oil supply channel housing |
Frequently Asked Questions
Q: Can the 4656.056.011 be reused after removal?
A: No. This is a single-use sealing component. Once removed, the material loses its compression set and must be replaced with a new OEM genuine part to avoid leaks.
Q: What tools are required for installation?
A: You will need a torque wrench, seal driver kit, and thread locker. Always reference the ZF service manual for the WG 160 series to ensure proper seating depth.
Q: How does this part differ from aftermarket alternatives?
A: The OEM 4656.056.011 uses proprietary rubber compounds and precision-molded geometry that aftermarket parts often fail to replicate, leading to premature failure in high-cycle applications.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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