Overview
The ZF 4656.055.106 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This part serves as a critical sealing and alignment interface within the transmission’s hydraulic control circuit, ensuring consistent oil pressure distribution to the clutch packs and valve body. The SKU 4656.055.106 is manufactured to ZF’s exacting tolerances, providing a direct replacement that restores factory-specified shift quality and prevents internal cross-leakage. It sits between the TRANSMISSION HOUSING and the HOUS.FRONT SECT, acting as a wear-resistant barrier that maintains hydraulic integrity under high thermal loads.
Symptoms of Failure
When the ZF 4656.055.106 begins to degrade, operators will notice distinct performance issues. Oil leaks around the bell housing area are the most common early indicator, often accompanied by a visible drip after extended operation. Erratic gear engagement or delayed shifting occurs as internal pressure drops due to seal bypass. Transmission overheating may follow as the fluid loses its ability to lubricate effectively. In severe cases, slipping under load becomes apparent, particularly when climbing grades or carrying heavy payloads—a clear sign that the hydraulic circuit has been compromised.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.055.106 |
| Material | High-grade aluminum alloy with nitrile rubber sealing element |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 112 mm |
| Inner Diameter | 68 mm |
| Height | 22 mm |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.055.106 |
Compatibility
This genuine ZF part is engineered primarily for the WG 160 Series transmission, but it also fits select variants within the WG 180 and WG 200 families that share the same hydraulic control architecture. It is compatible with transmissions used in municipal trucks, refuse vehicles, and medium-duty construction equipment. For proper fitment, verify that your transmission’s HOUSING REAR PART and HOUSING REAR SECTION match the WG 160 casting numbers. Always cross-reference your existing part against the OEM catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing that encloses all internal components |
| 4656201075 | HOUS.FRONT SECT | Forward section of the housing that supports the input shaft |
| 4656201077 | HOUSING REAR PART | Rear housing section that aligns the output shaft assembly |
| 4656298049 | HOUSING REAR SECTION | Secondary rear housing component for additional structural support |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for housing doweling |
| 4656301148 | FIXING PLATE | Secures internal components against axial movement |
| 0636100817 | CAP SCREW | High-tensile fastener for housing attachment |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid debris removal |
| 4656301017 | SCREEN SHEET | Secondary filter screen for high-flow circuits |
| 0636100803 | CAP SCREW | Fastener for securing the screen sheet assembly |
Frequently Asked Questions
Q: Can I install the ZF 4656.055.106 without replacing the housing gaskets?
A: It is strongly recommended to replace all adjacent seals and gaskets simultaneously. The part interfaces directly with the TRANSMISSION HOUSING and HOUS.FRONT SECT, and reusing old gaskets can compromise hydraulic pressure restoration.
Q: How do I confirm this part fits my WG 160 transmission?
A: Locate the transmission serial number stamped on the HOUSING REAR PART. Cross-reference the 4656.055.106 with your transmission’s OEM parts list. If the housing casting includes a WG 160 prefix, this part is compatible.
Q: What torque specification should I use for the cap screws when installing this part?
A: Use 45 Nm (33 ft-lbs) for the CAP SCREW fasteners. Always apply a thread-locking compound to prevent loosening from vibration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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