Overview
The ZF 4656.056.317 is a precision-engineered component specifically designed for the WG 160 Series transmission. This OEM genuine part plays a critical role in maintaining hydraulic pressure integrity and ensuring smooth gear engagement within the transmission valve body assembly. As a high-wear item, the SKU 4656.056.317 directly influences shift quality and overall drivetrain reliability. When installed correctly, it restores factory-specified clearances and prevents cross-leakage between hydraulic circuits, making it an essential replacement for any WG160 overhaul or repair.
Symptoms of Failure
When the ZF 4656.056.317 begins to wear out, operators will notice distinct performance degradation. Common failure symptoms include:
- Delayed or harsh shifting – A worn part causes inconsistent hydraulic pressure, leading to jerky gear changes or hesitation when accelerating.
- Transmission fluid seepage – Deterioration of sealing surfaces results in oil leaks around the valve body area, often visible as drips under the vehicle.
- Erratic clutch engagement – The part’s inability to maintain proper oil flow leads to clutch pack slippage, especially under load or during uphill driving.
- Unusual whining or buzzing noises – Internal wear creates turbulence in the hydraulic circuit, producing audible sounds that intensify with RPM changes.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.056.317 |
| OEM Reference | ZF 4656.056.317 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.45 kg (approx.) |
| Dimensions (L x W x H) | 85 mm x 40 mm x 25 mm |
| Compatible Series | WG 160 |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission. It is also compatible with select variants in the WG180 and WG200 families, provided the valve body configuration matches. Always verify your transmission model number before ordering. For optimal performance, replace this component alongside related hardware such as the 0636115293: 螺栓 and the 0634313603: O-RING to ensure a complete seal. Additionally, the 0631306816: CYLINDRICAL PIN and 4656301148: FIXING PLATE are frequently ordered together to secure the assembly during high-torque operation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Secures valve body components to prevent loosening |
| 0634313603 | O-RING | Provides hydraulic seal to prevent fluid bypass |
| 0631306816 | CYLINDRICAL PIN | Aligns and locates mating parts during assembly |
| 4656301148 | FIXING PLATE | Retains shift components in correct position |
| 0636100817 | CAP SCREW | Fastens hydraulic passages with high torque tolerance |
| 4656301016 | SCREEN SHEET | Filters debris from transmission fluid flow |
| 4656301017 | SCREEN SHEET | Secondary filtration for fine particle removal |
| 0636100803 | CAP SCREW | Secures cover plates to the transmission housing |
| 4656301047 | OIL FEED.HOUSG. | Directs lubricant to critical bearing surfaces |
| 0736300233 | TORX SCREW | Tamper-resistant fastener for high-vibration areas |
Frequently Asked Questions
Q: How do I know if the ZF 4656.056.317 is the correct replacement for my WG160 transmission?
A: Verify your transmission’s serial number and valve body configuration. This part is designed for WG160 models, but cross-reference with your OEM parts catalog to confirm compatibility with WG180 or WG200 variants.
Q: Can I install this part without replacing the O-ring or bolts?
A: It is strongly recommended to replace the 0634313603: O-RING and 0636115293: 螺栓 simultaneously, as reused seals and fasteners can compromise hydraulic integrity and lead to premature failure.
Q: What tools are required for replacing the 4656.056.317?
A: Standard metric socket set, torque wrench, and seal installation tool. Ensure the transmission is drained and the valve body is properly aligned using the 0631306816: CYLINDRICAL PIN for precise positioning.
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Phone: +86 158 2286 3467 |
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