Overview
The ZF 4656.056.162 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined guide or actuator component within the valve body or clutch housing assembly, ensuring accurate hydraulic fluid routing for smooth gear engagement. As a direct OEM replacement, the SKU 4656.056.162 guarantees exact fitment and factory-specified tolerances, eliminating the risk of premature wear associated with aftermarket alternatives. It integrates seamlessly with the TRANSMISSION HOUSING to maintain structural integrity under high torque loads.
Symptoms of Failure
When the ZF 4656.056.162 begins to degrade, operators typically notice these specific failure indicators:
- Delayed or harsh shifting – Worn tolerances cause erratic hydraulic pressure, leading to jarring gear changes during acceleration.
- Intermittent gear slippage – The part’s inability to maintain proper valve positioning results in momentary power loss under load.
- Hydraulic fluid contamination – Internal wear particles from this component circulate through the system, accelerating damage to the HOUS.FRONT SECT and adjacent seals.
- Audible whining or grinding – Metal-on-metal contact from a failing part produces distinct noises during gear engagement, particularly in cold-start conditions.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.056.162 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Overall Length | 142 mm |
| Outer Diameter | 38 mm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF WG 160 Series |
Compatibility
This genuine ZF 4656.056.162 part is designed for the WG 160 Series transmission family. It is also compatible with the following ZF models that share the same valve body architecture: WG 180, WG 200, WG 210, and WG 220. Always verify your transmission serial number against the OEM parts catalog. For complete assembly integrity, this component works in conjunction with the HOUSING REAR PART and the HOUSING REAR SECTION to ensure proper sealing and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201077 | HOUSING REAR PART | Rear housing section for output bearing |
| 4656298049 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retention bracket for valve body |
| 0636100817 | CAP SCREW | M10 fastening bolt for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for oil sump |
| 0636100803 | CAP SCREW | M8 fastening bolt for cover plate |
Frequently Asked Questions
Q: Can the ZF 4656.056.162 be replaced without removing the transmission from the vehicle?
In most WG 160 applications, this part is accessible after draining the fluid and removing the valve body cover. However, on certain chassis configurations, clearance may require partial transmission lowering. Always consult the OEM service manual for your specific model.
Q: What is the typical service interval for this component?
While ZF does not specify a standalone replacement interval, the 4656.056.162 should be inspected during major transmission overhauls (every 500,000 km or 8,000 operating hours). Premature failure is often linked to contaminated hydraulic fluid or worn adjacent components like the HOUS.FRONT SECT.
Q: Does this part come with a warranty?
As an OEM genuine ZF part, the 4656.056.162 is covered by ZF’s standard manufacturing defect warranty. Always purchase from authorized distributors to ensure full warranty validity and authentic packaging.
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Phone: +86 158 2286 3467 |
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