Overview
The ZF 4656.006.302 is a precision-engineered OEM genuine component designed specifically for the WG 115 Series transmission. This part functions as a critical internal control element, regulating hydraulic pressure and fluid flow within the valve body assembly. As an original ZF part, the 4656.006.302 ensures exact fitment and reliable performance in heavy-duty industrial applications. The SKU 4656.006.302 is often replaced in conjunction with the 4656201085: HOUS.FRONT SECT and the 0631306816: CYLINDRICAL PIN during a major overhaul to restore transmission integrity.
Symptoms of Failure
- Erratic shifting or gear hunting: When the 4656.006.302 wears, internal hydraulic pressure fluctuates, causing the transmission to slip between gears or fail to engage properly.
- Oil leaks around the valve body: A worn sealing surface on this part leads to ATF seepage, often visible as drips under the bell housing or around the pan gasket.
- Delayed engagement from Neutral to Drive: Operators may notice a 2-3 second lag when shifting, indicating insufficient pilot pressure from the 4656.006.302.
- Overheating transmission fluid: Restricted flow caused by a degraded part forces the torque converter to work harder, raising operating temperatures above 200°F.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.006.302 |
| Material | Hardened steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 30 mm |
| OEM Reference | ZF 4656.006.302 (Genuine) |
| Thread Type | Metric M8 x 1.25 |
| Operating Pressure Range | 8-22 bar (116-319 psi) |
Compatibility
This OEM part is primarily engineered for the ZF WG 115 Series transmission, commonly found in construction and agricultural machinery. It is also compatible with the WG 180, WG 200, and WG 150 series models that share the same valve body architecture. For proper installation, always pair the 4656.006.302 with the 4656301148: FIXING PLATE and the 0636100817: CAP SCREW to ensure correct torque specifications and alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section for valve body assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 4656301148 | FIXING PLATE | Secures internal components against vibration |
| 0636100817 | CAP SCREW | High-strength fastener for valve body retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Secondary filter element for debris protection |
| 0636100803 | CAP SCREW | M8 cap screw for auxiliary mounting points |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing for lubrication circuit |
| 0736300233 | TORX SCREW | Torx-head screw for tamper-resistant fastening |
| 4656301023 | GASKET | Sealing gasket for oil-tight connections |
Frequently Asked Questions
Q: How do I know if the 4656.006.302 is the correct replacement for my WG115?
A: Verify your transmission serial number and compare it to the OEM parts list. This part is specific to WG115 valve bodies with a 120mm mounting pattern. If your unit uses a different pattern, consider the 4656301047 oil feed housing instead.
Q: Can I install this part without replacing the fixing plate and cap screws?
A: ZF recommends replacing the 4656301148: FIXING PLATE and 0636100817: CAP SCREW simultaneously to prevent thread galling and ensure proper clamping force. Reusing old hardware risks oil leaks and shifting issues.
Q: What is the typical lifespan of this part under normal operating conditions?
A: In industrial applications with regular fluid changes (every 500 hours), the 4656.006.302 typically lasts 5,000-8,000 hours. Signs of wear include visible scoring on the sealing surface or a drop in line pressure below 8 bar.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
