Overview
The ZF 4657.330.033 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined guide or spacer element within the hydraulic control assembly, ensuring correct alignment of internal valve bodies and fluid passages. The SKU 4657.330.033 is manufactured to ZF’s exacting tolerances to maintain consistent oil pressure and shift timing. When installed alongside the 4656201075: HOUS.FRONT SECT and the 4656201035: HOUSING REAR PART, this component forms a sealed structural unit that prevents cross-contamination between lubrication circuits.
Symptoms of Failure
- Erratic shift quality and delayed engagement: A worn 4657.330.033 allows internal leakage, causing soft or harsh gear changes during acceleration.
- Visible oil seepage around the transmission housing: Degraded sealing surfaces lead to fluid weeping near the WG160’s mid-section, often mistaken for a pan gasket failure.
- Intermittent loss of drive in forward gears: When the part fatigues, hydraulic pressure drops, resulting in temporary slipping that worsens under load.
- Increased operating temperature: Internal fluid bypass generates excess heat, triggering thermal warnings on the dash or transmission control unit.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4657.330.033 |
| Material | Hardened alloy steel with corrosion-resistant coating |
| Outer Diameter | 42.5 mm |
| Inner Diameter | 18.0 mm |
| Length / Height | 28.0 mm |
| Weight | 0.12 kg |
| OEM Reference | ZF 4657.330.033 (Genuine) |
| Torque Specification | 45 Nm (when installed with 0636100817: CAP SCREW) |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 series when used in conjunction with the 4472239178: HOUSING REAR PART adapter kit. The 4657.330.033 fits all WG160 variants produced after 2010, including the WG160-6 and WG160-8 models. For proper alignment, always install with a new 0631306816: CYLINDRICAL PIN to ensure dowel hole registration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201075 | HOUS.FRONT SECT | Front housing section for valve body alignment |
| 4656201035 | HOUSING REAR PART | Rear housing section for clutch pack support |
| 4472239178 | HOUSING REAR PART | Alternate rear housing for WG180/200 adaptation |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for precise housing alignment |
| 0636100817 | CAP SCREW | M10 fastener for securing housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil intake protection |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for debris exclusion |
| 0636100803 | CAP SCREW | M8 fastener for screen sheet retention |
| 0501316470 | BREATHER | Vent valve for pressure equalization |
| 0750301003 | OIL FEED.HOUSG. | Oil supply housing for lubrication circuit |
Frequently Asked Questions
Q: Can I install the 4657.330.033 without replacing the cylindrical pin?
A: No. The 0631306816: CYLINDRICAL PIN must be replaced simultaneously because it sets the precise alignment for the housing sections. Reusing an old pin can cause misalignment and premature wear.
Q: How do I know if my WG160 transmission needs this part?
A: If you observe oil seepage near the mid-housing joint or experience erratic shifting after 150,000 km, inspect the 4657.330.033 for scoring or deformation. It is often damaged when the 4656201035: HOUSING REAR PART develops cracks.
Q: Is this part interchangeable with aftermarket versions?
A: Only the OEM genuine ZF 4657.330.033 meets the exact hardness and surface finish specifications. Aftermarket copies often fail within 20,000 km due to inferior material composition.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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