Overview
This OEM genuine ZF 4656.176.083 component is a critical internal seal and guide element specifically engineered for the WG 160 Series transmission. Positioned within the valve body or clutch housing assembly, this part regulates hydraulic fluid flow and maintains precise pressure tolerances during gear shifts. The SKU 4656.176.083 ensures exact dimensional conformity to ZF factory specifications, preventing cross-contamination between hydraulic circuits. When installed alongside the TRANSMISSION HOUSING, it forms a sealed boundary that directs oil to critical rotating components.
Symptoms of Failure
- Delayed or harsh engagement – When the 4656.176.083 wears, hydraulic pressure bleeds off, causing a noticeable lag when shifting from neutral to drive or reverse.
- Intermittent gear slipping under load – A worn part allows fluid to bypass the clutch pack, resulting in RPM flare without corresponding vehicle acceleration.
- External oil seepage near the valve body – Cracks or deformation in this component create visible drips or wet spots on the transmission casing, often mistaken for a gasket failure.
- Erratic shift timing – The transmission may shift too early or too late as internal leakage disrupts the governor pressure curve.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.176.083 |
| Material | Hardened steel with nitrile coating |
| Outer Diameter | 38.5 mm |
| Inner Diameter | 22.0 mm |
| Height | 14.2 mm |
| Weight | 0.045 kg |
| Operating Pressure | 12–18 bar |
| Temperature Range | -30°C to +120°C |
Compatibility
This genuine ZF 4656.176.083 is primarily designed for the WG 160 Series transmissions. It is also compatible with the WG 180 and WG 200 series when used in conjunction with the correct HOUS.FRONT SECT and HOUSING REAR PART. For heavy-duty applications, pairing it with the HOUSING REAR SECTION ensures proper alignment in extended wheelbase configurations. Always verify your transmission model code before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101077 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656201102 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201103 | HOUSING REAR PART | Rear section supporting output shaft bearings |
| 4656298063 | HOUSING REAR SECTION | Extended rear housing for PTO adapters |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0750301002 | FIXING PLATE | Retains valve body components in position |
| 0636100817 | CAP SCREW | M8 bolt for securing housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic oil |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M6 bolt for valve body attachment |
Frequently Asked Questions
Q: How do I know if the 4656.176.083 is the correct part for my WG160?
A: Verify your transmission serial number and compare the outer diameter of your old component. This part fits all WG160 variants built after 2008. If your transmission uses a different housing, you may need the HOUS.FRONT SECT adapter kit.
Q: Can I replace this part without removing the transmission?
A: Yes, in most cases. The 4656.176.083 is accessible after dropping the valve body. However, if the TRANSMISSION HOUSING shows scoring, a full removal may be necessary to avoid debris contamination.
Q: What is the typical lifespan of this OEM part?
A: Under normal operating conditions with regular fluid changes, the 4656.176.083 lasts 300,000–400,000 km. Early failure often indicates a clogged SCREEN SHEET or worn CYLINDRICAL PIN alignment.
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Phone: +86 158 2286 3467 |
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