Overview
The ZF 4656.056.193 is a precision-engineered component specifically designed for the WG 160 series transmission. This OEM genuine part serves as a critical sealing and alignment element within the transmission’s hydraulic control circuit, ensuring proper fluid pressure regulation and gear engagement. The SKU 4656.056.193 sits between the main valve body and the transmission housing, where it prevents cross-contamination of oil circuits and maintains consistent shift quality. As a factory-specification part, it guarantees exact fitment and durability under heavy-duty industrial loads.
Symptoms of Failure
When the ZF 4656.056.193 begins to wear, operators typically notice three distinct failure modes. First, delayed or harsh gear engagement occurs as hydraulic pressure bleeds past the worn sealing surfaces, causing erratic shifting behavior. Second, visible oil seepage around the transmission housing joint indicates that the part has lost its sealing integrity, often leading to low fluid levels and overheating. Third, intermittent transmission slipping under load becomes apparent, particularly when towing or climbing grades, as the component fails to maintain proper clutch pack pressure. These symptoms often prompt replacement alongside the 4656101056: TRANSMISSION HOUSING to restore full system performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.056.193 |
| Material | High-grade aluminum alloy with nitrile rubber sealing |
| Weight | 0.45 kg (1.0 lb) |
| Length | 85 mm |
| Width | 45 mm |
| Height | 22 mm |
| Operating Temperature Range | -40°C to +120°C |
| OEM Reference | ZF 4656.056.193 (WG 160 Series) |
Compatibility
This component is engineered for the ZF WG 160 series, but it also shares dimensional compatibility with several other ZF transmission models. It fits the WG 160, WG 180, and WG 200 series transmissions used in medium-duty trucks, buses, and construction equipment. Additionally, it is compatible with the WG 150 and WG 220 variants when used in conjunction with the correct 4656201075: HOUS.FRONT SECT and 4656201077: HOUSING REAR PART. For complete assembly, the 4656298049: HOUSING REAR SECTION is also required to ensure proper alignment and sealing.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear and shaft assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft and bearings |
| 4656201077 | HOUSING REAR PART | Rear housing section for output shaft support |
| 4656298049 | HOUSING REAR SECTION | Additional rear housing segment for extended transmissions |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing positioning |
| 4656301148 | FIXING PLATE | Retaining plate for securing internal components |
| 0636100817 | CAP SCREW | Fastener for housing-to-case attachment |
| 4656301016 | SCREEN SHEET | Filter screen for oil intake protection |
| 4656301017 | SCREEN SHEET | Secondary filter screen for hydraulic circuit |
| 0636100803 | CAP SCREW | Bolt for securing valve body to housing |
Frequently Asked Questions
Q: How do I know if the 4656.056.193 needs replacement?
A: If you notice fluid weeping from the transmission housing seam or experience erratic shift timing, inspect this sealing component. A simple pressure test of the hydraulic circuit will confirm if the part has failed.
Q: Can I install this part without removing the entire transmission?
A: Yes, in most WG 160 applications, the 4656.056.193 is accessible after removing the transmission oil pan and valve body. However, always consult your service manual for specific vehicle clearance requirements.
Q: Is this part interchangeable with aftermarket alternatives?
A: While aftermarket seals may physically fit, only the OEM genuine 4656.056.193 guarantees the exact Shore hardness and dimensional tolerances required for long-term reliability in heavy-duty cycles.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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