Overview
The ZF 4656.056.185 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined internal guide or spacer element, ensuring correct axial alignment and load distribution within the gear train assembly. By maintaining exact tolerances, it prevents unwanted movement between rotating assemblies. The SKU 4656.056.185 is manufactured to ZF’s original specifications, guaranteeing a direct fit and long service life when replacing worn units in your heavy-duty drivetrain.
Symptoms of Failure
When the ZF 4656.056.185 begins to wear, operators often notice distinct operational issues. Transmission gear slippage under load is a primary indicator, as the part loses its ability to maintain proper spacing. Metallic grinding noises during gear changes frequently accompany this failure, signaling metal-on-metal contact. Another common symptom is intermittent loss of drive in forward gears, particularly during uphill hauling. Finally, contaminated transmission fluid with visible metal particles may appear, indicating advanced wear of this internal component.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4656.056.185 |
| Material | Case-hardened alloy steel |
| Weight | 0.85 kg (1.87 lbs) |
| Surface Treatment | Phosphate-coated for corrosion resistance |
| OEM Reference | ZF WG 160 Series |
| Hardness | 58-62 HRC |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This OEM genuine part is primarily designed for the ZF WG 160 transmission series. It is also compatible with the WG 180 and WG 200 series transmissions that share the same internal architecture. The 4656.056.185 is not compatible with older ZF 4HP or 5HP series units. Always verify your transmission model number before ordering.
Related Components
This part works in conjunction with several other ZF components within the same assembly. For a complete overhaul, consider replacing the 4656101056: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT. Additionally, the 4656201077: HOUSING REAR PART and 4656298049: HOUSING REAR SECTION are frequently replaced during the same service interval to ensure optimal sealing and alignment.
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201077 | HOUSING REAR PART | Rear housing section for output bearing retention |
| 4656298049 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 4656301148 | FIXING PLATE | Locking plate for bearing retention |
| 0636100817 | CAP SCREW | M10x25 high-tensile bolt for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil pickup |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M8x20 bolt for cover plate fastening |
Frequently Asked Questions
Q: Can I install the 4656.056.185 without replacing the transmission housing?
A: Yes, this part can be replaced independently. However, we recommend inspecting the TRANSMISSION HOUSING for cracks or wear, as damaged housings can accelerate failure of the new component.
Q: How do I know if my WG160 needs this specific part?
A: If you experience gear slippage accompanied by metallic debris in the oil filter screen (such as the SCREEN SHEET), the 4656.056.185 is a likely culprit. A visual inspection will reveal scoring or deformation on the part surface.
Q: Is this part interchangeable between WG160 and WG180 transmissions?
A: Yes, the 4656.056.185 is physically identical in both the WG160 and WG180 series. Always confirm with your transmission serial number, as some early WG180 units used a different spacer design.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
