Overview
This OEM genuine ZF 4656.056.153 component is a critical internal actuator and sealing element specifically engineered for the WG 160 Series transmission. Positioned within the valve body assembly, it modulates hydraulic pressure to facilitate smooth clutch engagement and gear shifts. The SKU 4656.056.153 is precision-machined to factory tolerances, ensuring exact fitment and reliable oil flow regulation. When paired with the TRANSMISSION HOUSING, it maintains the structural integrity required for high-torque industrial applications.
Symptoms of Failure
- Delayed or harsh shifting: Worn internal seals cause erratic hydraulic pressure, leading to noticeable lag or jarring gear changes.
- Transmission fluid seepage: Degraded O-rings or valve body wear allow ATF to escape, leaving puddles under the vehicle.
- Intermittent gear slippage: Inconsistent clutch pack engagement results in power loss under load, especially during uphill climbs.
- Erratic neutral-to-drive engagement: The part’s inability to hold pressure causes a delayed or lurching response when shifting from park.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.056.153 |
| Material | Hardened steel with nitrile rubber seals |
| Weight | 0.85 kg (1.87 lbs) |
| Length | 142 mm |
| Width | 38 mm |
| Height | 28 mm |
| OEM Reference | ZF 4656.056.153 |
| Operating Pressure | 12–18 bar |
Compatibility
This genuine ZF part is designed primarily for the WG 160 Series transmission, but it also cross-fits select models in the WG180 and WG200 families due to shared valve body architecture. It is not compatible with the WG150 or WG210 variants without modification. For proper installation, ensure the HOUS.FRONT SECT and HOUSING REAR PART are free of debris. Additionally, verify alignment with the HOUSING REAR SECTION to prevent premature wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Encloses gear train and valve body |
| 4656201075 | HOUS.FRONT SECT | Front section of main housing |
| 4656201077 | HOUSING REAR PART | Rear housing component |
| 4656298049 | HOUSING REAR SECTION | Lower rear section of housing |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing |
| 4656301148 | FIXING PLATE | Secures valve body components |
| 0636100817 | CAP SCREW | Fastens housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for fluid |
| 4656301017 | SCREEN SHEET | Coarse mesh filter for fluid |
| 0636100803 | CAP SCREW | Mounting bolt for valve body |
Frequently Asked Questions
Q: How do I know if the 4656.056.153 needs replacement?
A: Look for persistent ATF leaks near the valve body cover or a noticeable delay when shifting from neutral to drive. A pressure test showing below 12 bar at idle confirms internal seal failure.
Q: Can this part be reused after a transmission rebuild?
A: No. ZF recommends replacing the 4656.056.153 with a new OEM unit during any major overhaul, as the internal seals degrade with heat cycles and cannot be reliably re-sealed.
Q: Is this part compatible with the WG180 transmission?
A: Yes, it fits WG180 models built after 2012, provided the valve body uses the same hydraulic circuit. Always cross-reference your transmission serial number with the ZF parts catalog.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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