Overview
The ZF 4656.298.056 is a precision-engineered OEM genuine part designed specifically for the WG 160 series transmission. This component functions as a critical sealing and alignment element within the hydraulic control unit, ensuring proper oil pressure regulation and smooth gear engagement. As an integral part of the valve body assembly, the 4656.298.056 works in concert with the HOUS.FRONT SECT (4656201085) to maintain structural integrity under high torque loads. The SKU 4656.298.056 is manufactured to ZF’s exacting tolerances, guaranteeing a direct fit and long service life in commercial vehicle applications.
Symptoms of Failure
- Erratic shifting or gear slipping – When the 4656.298.056 wears, internal hydraulic pressure drops, causing delayed or harsh gear changes, especially under load.
- Transmission fluid leaks – A degraded seal surface on this part leads to external oil seepage around the valve body area, often noticed as drips on the transmission housing.
- Overheating during operation – Reduced oil flow from a failing 4656.298.056 forces the transmission to run hotter, triggering warning lights or burnt fluid smell.
- Noise from the transmission pump – Cavitation or whining sounds indicate insufficient lubrication, directly traceable to a worn 4656.298.056 component.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4656.298.056 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.45 kg (approx.) |
| Dimensions (L x W x H) | 85 mm x 42 mm x 18 mm |
| Surface Finish | Ground and polished to Ra 0.8 µm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4656.298.056 (Genuine) |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 series, but it also fits the WG 180 and WG 200 transmissions due to shared hydraulic architecture. It is compatible with ZF 6WG160, 6WG180, and 6WG200 models used in buses, trucks, and off-highway equipment. For proper installation, ensure the mating surfaces are clean and pair this part with the 螺栓 (0636115293) for secure fastening, and replace the O-RING (0634313603) to prevent leaks. The CYLINDRICAL PIN (0631306816) is also required for precise alignment during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section for valve body assembly |
| 0636115293 | 螺栓 | Mounting bolt for securing transmission components |
| 0634313603 | O-RING | Sealing ring to prevent fluid leaks |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 4656301148 | FIXING PLATE | Retaining plate for securing internal parts |
| 0636100817 | CAP SCREW | Fastener for high-stress connections |
| 4656301016 | SCREEN SHEET | Filter screen for oil debris protection |
| 4656301017 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100803 | CAP SCREW | Low-profile fastener for confined spaces |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing for lubricant distribution |
Frequently Asked Questions
Q: How do I know if the 4656.298.056 needs replacement?
A: Look for persistent transmission fluid leaks near the valve body, erratic shifting patterns, or a noticeable drop in hydraulic pressure during diagnostic testing. If any of these symptoms appear, inspect the 4656.298.056 for wear or deformation.
Q: Can I install this part without replacing the O-ring?
A: No. Always replace the O-RING (0634313603) simultaneously, as old seals will compromise the new part’s performance and lead to immediate leaks.
Q: Is the 4656.298.056 compatible with aftermarket transmission rebuild kits?
A> This OEM genuine part is designed for direct fitment in ZF WG160 series transmissions. While it may physically fit some aftermarket kits, we recommend using only OEM components to maintain warranty and performance standards.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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