Overview
The ZF 4656.183.028 is a critical OEM genuine component designed specifically for the WG 160 series transmission. This precision-engineered part serves as a structural and functional element within the gearbox assembly, ensuring proper alignment and load distribution during operation. The SKU 4656.183.028 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in heavy-duty commercial and industrial drivetrains. It sits in the mid-section of the transmission, interfacing directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity under high torque loads.
Symptoms of Failure
- Oil seepage around the housing joint: When the 4656.183.028 degrades, you may notice transmission fluid leaking from the seam between the HOUSING REAR PART and the main casing, often mistaken for a gasket failure.
- Abnormal gear engagement noise: A worn part can cause misalignment, leading to a grinding or whining sound when shifting between forward and reverse gears in the WG160.
- Intermittent power loss under load: As the component fatigues, it may allow slight movement of internal shafts, resulting in temporary slipping or hesitation during acceleration.
- Vibration at highway speeds: Degraded structural support can transmit excessive vibration through the driveline, particularly noticeable in the 40-60 mph range.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.183.028 |
| Material | High-strength cast iron (GGG-40 equivalent) |
| Weight | 2.85 kg (6.28 lbs) |
| Dimensions (L x W x H) | 185 mm x 120 mm x 55 mm |
| Surface Finish | Corrosion-resistant phosphate coating |
| OEM Reference | ZF 4656.183.028 (Genuine) |
| Bolt Torque Spec | 45 Nm ± 5 Nm (with CAP SCREW 0636100817) |
Compatibility
This part is engineered for the ZF WG 160 series, but it also fits select models in the WG 180 and WG 200 families when used with the correct HOUSING REAR PART (4472239178). It is commonly found in ZF 6WG160, 5WG180, and 4WG200 transmissions used in municipal buses, fire trucks, and off-highway construction equipment. Always verify compatibility with your specific transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201035 | HOUSING REAR PART | Rear housing for output shaft support |
| 4472239178 | HOUSING REAR PART | Alternate rear housing for WG200 series |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 4656301148 | FIXING PLATE | Secures internal components in position |
| 0636100817 | CAP SCREW | M10 bolt for housing fastening |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M8 bolt for accessory mounting |
Frequently Asked Questions
Q: Can I install the 4656.183.028 without replacing the TRANSMISSION HOUSING?
A: Yes, this part is designed as a standalone replacement. However, if the mating surfaces on the TRANSMISSION HOUSING show scoring or corrosion, we recommend replacing both simultaneously to prevent future leaks.
Q: How do I know if my WG160 needs this specific part?
A: Look for the part number stamped on the side of the housing near the oil fill plug. If you see “4656.183.028” or a worn casting number, this is the correct OEM replacement. Cross-reference with your transmission’s serial number for absolute certainty.
Q: What torque should I use for the CAP SCREW fasteners?
A: Use 45 Nm for the CAP SCREW 0636100817 and 25 Nm for the CAP SCREW 0636100803. Always apply thread locker to prevent loosening under vibration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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