Overview
The ZF 4656.056.137 is a precision-engineered OEM genuine component specifically designed for the WG 160 Series transmission. This critical part functions as a sealing and alignment element within the gearbox assembly, ensuring proper hydraulic pressure retention and shaft concentricity. As an integral part of the transmission’s internal architecture, the SKU 4656.056.137 works in concert with the TRANSMISSION HOUSING to maintain structural integrity under heavy loads. Without this component, the transmission cannot maintain the precise tolerances required for smooth power delivery in commercial vehicle applications.
Symptoms of Failure
- Oil seepage at the housing joint – When the 4656.056.137 degrades, you may notice transmission fluid accumulating around the mating surface between the HOUS.FRONT SECT and the main casing, leading to gradual fluid loss.
- Intermittent gear engagement hesitation – A worn part causes hydraulic pressure fluctuations, resulting in delayed or rough shifting during load changes.
- Abnormal driveline vibration – Loss of alignment support from this component allows the HOUSING REAR PART to shift slightly, creating low-frequency vibrations under acceleration.
- Increased operating temperature – Internal fluid bypass due to a compromised seal forces the transmission to work harder, raising thermal stress on the HOUSING REAR SECTION.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.056.137 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 112 mm |
| Inner Diameter | 68 mm |
| Thickness | 14.5 mm |
| OEM Reference | ZF 4656.056.137 (Genuine) |
Compatibility
This genuine ZF part is primarily engineered for the WG 160 Series transmission family. Based on its design and mounting configuration, the 4656.056.137 is also compatible with the following ZF models: WG 180, WG 200, and WG 220. It is frequently used in municipal trucks, refuse vehicles, and medium-duty construction equipment where the WG series transmissions are standard. Always verify your transmission serial number before ordering to ensure correct fitment with your existing TRANSMISSION HOUSING assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing that encloses gear sets and shafts |
| 4656201075 | HOUS.FRONT SECT | Front section housing that supports input shaft bearings |
| 4656201077 | HOUSING REAR PART | Rear housing segment that aligns output shaft assembly |
| 4656298049 | HOUSING REAR SECTION | End cap housing providing final gear train enclosure |
| 0631306816 | CYLINDRICAL PIN | Precision alignment pin for housing mating surfaces |
| 4656301148 | FIXING PLATE | Secures internal components against axial movement |
| 0636100817 | CAP SCREW | High-tensile fastener for housing bolting |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid debris capture |
| 4656301017 | SCREEN SHEET | Secondary filter screen for high-flow circuits |
| 0636100803 | CAP SCREW | M10 flange bolt for rear housing attachment |
Frequently Asked Questions
Q: How do I know if the 4656.056.137 is the correct part for my WG160 transmission?
A: Verify your transmission model plate and compare the OEM number stamped on your existing component. This part is designed exclusively for ZF WG Series transmissions and will not fit older ZF 4HP or 5HP models.
Q: Can I reuse the old sealing surfaces when installing this part?
A: No. Always clean the mating surfaces on the HOUS.FRONT SECT and HOUSING REAR PART thoroughly. Replace any gaskets or O-rings during installation to prevent premature failure.
Q: What torque specification should I use for the housing bolts?
A: Refer to the ZF service manual for your specific WG model. Typical torque values range from 45-55 Nm for M10 cap screws like 0636100817 when securing the housing sections.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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