Overview
The ZF 4656.006.308 is an OEM genuine component engineered specifically for the WG 115 Series transmission. This precision-machined part plays a critical role in the hydraulic control circuit, regulating oil flow to maintain consistent clutch engagement and shift quality. As a direct replacement for the original factory unit, the SKU 4656.006.308 ensures that your transmission retains its factory-specified tolerances and durability. It is installed within the valve body assembly, where it interfaces directly with the 4656201085: HOUS.FRONT SECT to create a sealed pressure chamber.
Symptoms of Failure
- Erratic gear engagement or delayed shifting: When the 4656.006.308 wears, internal leakage disrupts hydraulic pressure, causing hesitation when moving from neutral into drive or reverse.
- Visible oil seepage around the valve body area: A worn sealing surface on this part allows transmission fluid to escape, often leaving wet spots on the bell housing or under the vehicle.
- Intermittent gear slipping under load: As the part loses its ability to maintain steady pressure, the transmission may momentarily lose torque transfer during acceleration or hill climbing.
- Harsh or flared shifts: Degraded internal passages cause pressure spikes or drops, resulting in abrupt clutch applications or prolonged slip between gear changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4656.006.308 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Overall Length | 112 mm (approx.) |
| Outer Diameter | 38 mm (approx.) |
| Weight | 0.45 kg (approx.) |
| OEM Reference | ZF 4656.006.308 |
| Seal Type | Integrated O-ring groove (O-ring not included) |
Compatibility
This genuine ZF part is primarily designed for the WG 115 Series transmission. It is also compatible with the WG 180 and WG 200 series when used in the same hydraulic circuit location. The 4656.006.308 is not interchangeable with earlier WG 100 series variants due to differences in bore diameter and port alignment. Always verify your transmission model tag before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section that encloses the valve body assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise positioning of components |
| 4656301148 | FIXING PLATE | Retains the valve body cover in place |
| 0636100817 | CAP SCREW | Secures the fixing plate to the housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for the hydraulic circuit |
| 4656301017 | SCREEN SHEET | Secondary mesh filter for high-pressure lines |
| 0636100803 | CAP SCREW | M8 cap screw for valve body attachment |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing that directs fluid to the clutch pack |
| 0736300233 | TORX SCREW | Torx-head screw for oil feed housing retention |
| 4656301023 | GASKET | Sealing gasket between valve body and housing |
Frequently Asked Questions
Q: Can I install the 4656.006.308 without replacing the associated seals?
It is strongly recommended to replace all O-rings and gaskets in the valve body area when installing this part. The 4656301023: GASKET and the sealing surfaces on the 4656201085: HOUS.FRONT SECT must be clean and undamaged to prevent future leaks.
Q: How do I know if my transmission uses the WG 115 series?
Check the transmission data plate located on the side of the main case. The model designation will be stamped as “WG115” followed by a serial number. This part is not backward-compatible with WG 100 or WG 130 series units.
Q: What torque should I apply to the cap screws when reinstalling?
Use 22 Nm (16 ft-lbs) for the 0636100817: CAP SCREW and 10 Nm (7 ft-lbs) for the 0736300233: TORX SCREW. Over-torquing can distort the valve body bore and cause binding.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
