Overview
The ZF 4656.354.019 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined internal guide or actuator element, responsible for directing hydraulic fluid flow and ensuring smooth clutch pack engagement within the gear train. As a factory-original ZF part, SKU 4656.354.019 guarantees exact tolerances and material composition required for long-term durability in heavy-duty commercial applications. It sits within the valve body or clutch housing assembly, directly interfacing with the main control system to modulate gear shifts under load.
Symptoms of Failure
When the ZF 4656.354.019 begins to wear, operators may notice delayed or harsh gear engagement during acceleration, particularly in lower gears. Another common failure symptom is intermittent loss of drive in forward gears, often accompanied by a grinding noise from the transmission housing. You may also observe erratic shift patterns where the transmission hunts between gears or fails to hold a selected ratio. Finally, internal hydraulic pressure drops can occur, leading to slipping under load and increased transmission fluid temperature.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4656.354.019 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 35 mm |
| OEM Reference | ZF WG 160 Series |
| Operating Pressure | 12–18 bar |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, but it also shares compatibility with the WG 180 and WG 200 models due to common internal architecture. It can be used in select WG 150 and WG 220 variants where the valve body configuration matches. Always verify the part number against your transmission’s serial plate before installation.
During replacement, it is common to service the TRANSMISSION HOUSING (4656101037) simultaneously to prevent contamination. The HOUS.FRONT SECT (4656201075) and HOUSING REAR PART (4656201035) are also frequently replaced together with this component. For complete rebuilds, the HOUSING REAR PART (4472239178) should be inspected for wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201035 | HOUSING REAR PART | Rear section housing for output shaft |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing mating |
| 4656301148 | FIXING PLATE | Secures internal components in position |
| 0636100817 | CAP SCREW | Fastener for housing assembly |
| 4656301016 | SCREEN SHEET | Filter screen for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Secondary filter screen variant |
| 0636100803 | CAP SCREW | Alternate fastener for cover plates |
Frequently Asked Questions
Q: Can the ZF 4656.354.019 be installed without removing the transmission?
A: In most cases, yes. This part is accessible after draining the fluid and removing the transmission pan. However, for WG 180 and WG 200 models, partial removal of the valve body may be required.
Q: How do I know if my WG 160 needs this part replaced?
A: If you experience hard shifting or a loss of forward drive, inspect the part for scoring or deformation. A pressure test showing below 12 bar in the clutch circuit often confirms wear.
Q: Is this part interchangeable with aftermarket versions?
A: Only OEM genuine ZF parts like 4656.354.019 guarantee the exact hardness and surface finish. Aftermarket copies may cause premature failure of the HOUS.FRONT SECT or other mating components.
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Phone: +86 158 2286 3467 |
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