Overview
The ZF 4656.102.031 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined guide or support element within the valve body or clutch housing assembly, ensuring correct hydraulic fluid routing and mechanical alignment during gear engagement. The SKU 4656.102.031 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions. When installed alongside the 4656201102: HOUS.FRONT SECT, it forms a sealed interface that prevents cross-contamination between lubrication circuits.
Symptoms of Failure
When the 4656.102.031 component begins to degrade, operators often notice intermittent gear slippage under load—a classic sign of insufficient hydraulic pressure caused by internal leakage. Another common failure symptom is erratic shift timing, where the transmission hesitates or clunks during upshifts, particularly in stop-and-go traffic. You may also observe dark, burnt-smelling transmission fluid on the dipstick, indicating localized overheating from restricted oil flow. Finally, visible oil seepage around the housing joint suggests the sealing surface has worn, requiring immediate replacement of this part along with the 0631306816: CYLINDRICAL PIN that secures its alignment.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4656.102.031 |
| Material | Hardened alloy steel with anti-corrosion coating |
| Weight | 0.42 kg (0.93 lbs) |
| Overall Length | 68.5 mm |
| Outer Diameter | 32.0 mm |
| Bore Diameter | 18.0 mm |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 4656.102.031 (Genuine) |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, which is widely used in municipal buses, refuse trucks, and medium-duty construction vehicles. Based on its design and mounting geometry, the 4656.102.031 is also compatible with the WG 180 and WG 200 series transmissions that share the same valve body architecture. For proper installation, always pair this component with a new 0750301002: FIXING PLATE and the correct 0636100817: CAP SCREW to achieve the specified torque values. Verify your transmission model number before ordering to ensure a perfect fit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201102 | HOUS.FRONT SECT | Front housing section for clutch assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0750301002 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | M10x1.5 fastener for housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil intake |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8x1.25 fastener for cover plate |
| 0750301003 | OIL FEED.HOUSG. | Housing for oil feed line |
| 0736300233 | TORX SCREW | Torx-head fastener for valve body |
| 4656301023 | GASKET | Sealing gasket for oil passage |
Frequently Asked Questions
Q: How do I know if my ZF WG160 needs the 4656.102.031 replaced?
A: If you experience hard shifting or delayed engagement, especially after the transmission reaches operating temperature, inspect this part for scoring or wear. A pressure test showing below-spec readings at the clutch feed port is a strong indicator.
Q: Can I reuse the old fixing plate and cap screws when installing this part?
A: No. ZF recommends always replacing the 0750301002: FIXING PLATE and 0636100817: CAP SCREW with new OEM fasteners to maintain proper clamping force and prevent oil leaks.
Q: Is the 4656.102.031 compatible with aftermarket filter screens?
A: Yes, but for optimal filtration, pair it with genuine ZF screens such as the 4656301016: SCREEN SHEET or 4656301017: SCREEN SHEET to avoid debris contamination.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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