Overview
The ZF 4656.056.310 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This part functions as a critical sealing and alignment element within the valve body or clutch housing assembly, ensuring proper hydraulic pressure distribution and mechanical stability. The SKU 4656.056.310 is manufactured to ZF’s exacting tolerances, making it essential for maintaining shift quality and preventing internal cross-leakage. When installed alongside the 4656201085: HOUS.FRONT SECT, it forms a sealed interface that directs oil flow to the correct circuits.
Symptoms of Failure
- Delayed or harsh gear engagement: A worn 4656.056.310 can cause pressure loss, leading to “ZF transmission slow to engage” or “hard shifting when cold.”
- Internal oil leaks: Degraded sealing surfaces result in “ZF WG160 transmission fluid leak from housing” or visible drips near the valve body area.
- Erratic shift patterns: When this part fails, you may experience “transmission slipping between gears” or “unexpected neutral drops” during operation.
- Contaminated transmission fluid: A compromised seal allows debris ingress, causing “dark or burnt-smelling ATF fluid” and reduced lubrication efficiency.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.056.310 |
| Material | Hardened steel with nitrile rubber sealing lip |
| Outer Diameter | 56 mm |
| Inner Diameter | 31 mm |
| Height | 10.5 mm |
| Weight | 0.045 kg |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.056.310 |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, but it also fits select models in the WG180 and WG200 families where identical sealing interfaces are used. It is a direct replacement for earlier revision parts in ZF’s 6-speed and 8-speed commercial vehicle transmissions. For proper installation, always pair this component with the 0636115293: 螺栓 (bolt) and 0634313603: O-RING to ensure a leak-free seal. Additionally, the 0631306816: CYLINDRICAL PIN is required for precise alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section providing structural support |
| 0636115293 | 螺栓 | Fastening bolt for secure assembly |
| 0634313603 | O-RING | Sealing ring preventing fluid leaks |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise positioning |
| 4656301148 | FIXING PLATE | Retaining plate for component stability |
| 0636100817 | CAP SCREW | Threaded fastener for secure mounting |
| 4656301016 | SCREEN SHEET | Filter screen for fluid debris protection |
| 4656301017 | SCREEN SHEET | Secondary filter screen for fine particles |
| 0636100803 | CAP SCREW | Low-profile cap screw for confined spaces |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing for lubrication distribution |
Frequently Asked Questions
Q: How do I know if the 4656.056.310 is failing?
A: Look for visible oil seepage around the valve body area, delayed engagement when shifting from Park to Drive, or a gradual increase in transmission operating temperature. These signs indicate the seal has lost its integrity.
Q: Can I reuse the old O-ring or bolt when replacing this part?
A: No. ZF recommends always replacing the 0634313603: O-RING and 0636115293: 螺栓 simultaneously to guarantee a proper seal and torque specification.
Q: Is this part compatible with the ZF WG180 transmission?
A: Yes, the 4656.056.310 is cross-compatible with WG180 and WG200 series transmissions that share the same valve body architecture. Always verify your transmission’s serial number against ZF’s compatibility chart.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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