Overview
The ZF 4656.055.312 is a precision-engineered OEM genuine component designed specifically for the WG 160 Series transmission. This part functions as a critical sealing and alignment element within the hydraulic control circuit, ensuring consistent oil pressure distribution to the clutch packs and valve body. The SKU 4656.055.312 sits directly between the front housing section and the main gear train, acting as a barrier against contamination while maintaining proper fluid flow. As an OEM genuine part, it guarantees exact fitment and material composition that aftermarket alternatives cannot replicate, making it essential for maintaining factory-specified transmission performance.
Symptoms of Failure
When the ZF 4656.055.312 begins to wear, operators typically notice intermittent gear slipping under load, particularly during uphill climbs or heavy hauling. Another common symptom is erratic shift timing, where the transmission hesitates or harshly engages between gears. Technicians often report visible oil seepage around the front housing joint, which can be mistaken for a main seal leak. In advanced failure cases, low hydraulic pressure warnings appear on the dashboard, directly linked to fluid bypassing this worn component. These symptoms progressively worsen if the part is not replaced promptly.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.055.312 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 22.3 mm |
| OEM Reference | ZF 4656.055.312 |
| Torque Specification | 45 Nm (33 ft-lbs) when paired with CAP SCREW |
Compatibility
This OEM genuine part is engineered primarily for the ZF WG 160 Series transmission, but it also cross-fits into the WG 180 and WG 200 models due to shared hydraulic architecture. It is compatible with all WG 160 variants including the WG160-6, WG160-8, and WG160-10. The part interfaces directly with the HOUS.FRONT SECT and is secured using a CYLINDRICAL PIN for precise alignment. A FIXING PLATE is required to lock the assembly in place, while the CAP SCREW provides final retention. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section that encloses the input shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 4656301148 | FIXING PLATE | Retention plate to secure internal assemblies |
| 0636100817 | CAP SCREW | High-tensile fastener for housing attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Secondary filter screen for debris protection |
| 0636100803 | CAP SCREW | Alternate fastener for valve body mounting |
| 4656301047 | OIL FEED.HOUSG. | Oil feed housing for lubricant distribution |
| 0736300233 | TORX SCREW | Torx-head screw for tamper-resistant fastening |
| 4656301023 | GASKET | Sealing gasket for fluid-tight joints |
Frequently Asked Questions
Q: Can I install the 4656.055.312 without replacing the gasket?
A: It is strongly recommended to replace the GASKET simultaneously, as reusing old gaskets often leads to immediate oil leaks and pressure loss.
Q: How do I know if this part fits my WG160 transmission?
A: Check the transmission serial number plate. This part is standard on WG160-6 through WG160-10 models. If your unit has a HOUS.FRONT SECT with four mounting bosses, it is compatible.
Q: What torque should I use for the cap screws?
A: Use 45 Nm for the CAP SCREW and 12 Nm for the TORX SCREW to avoid housing distortion.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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