Overview
This OEM genuine ZF 4656.183.268 component is a critical internal sealing and alignment element designed specifically for the WG 160 Series transmission. Positioned within the main gear train housing assembly, this part ensures precise oil flow regulation and maintains structural integrity between rotating shafts. The SKU 4656.183.268 interfaces directly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to create a sealed chamber that prevents cross-contamination of hydraulic circuits. As a factory-spec replacement, it restores original clamping force and dimensional tolerances essential for smooth power delivery in heavy-duty commercial vehicles.
Symptoms of Failure
- Progressive oil seepage at the housing joint: When the 4656.183.268 seal surface degrades, you will notice wet spots forming between the HOUSING REAR PART and the main casing, often mistaken for a gasket failure.
- Intermittent gear engagement delay: Worn alignment tolerances cause the clutch packs to drag, producing a 1-2 second hesitation when shifting from neutral to drive under load.
- Metallic debris in transmission fluid: As the part fatigues, microscopic particles from the hardened steel surface contaminate the oil, visible as glitter during routine drain intervals.
- Abnormal whining noise during deceleration: Loss of concentricity between the HOUSING REAR SECTION and the output shaft creates a high-pitched resonance that worsens as fluid temperature rises.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.183.268 |
| Material | Hardened alloy steel (DIN 1.7131 case-hardened) |
| Outer Diameter | 82.5 mm ± 0.05 mm |
| Inner Diameter | 38.0 mm ± 0.02 mm |
| Height | 24.8 mm |
| Weight | 0.34 kg |
| Surface Finish | Ra 0.4 µm (ground) |
| Operating Temperature Range | -40°C to +150°C |
| OEM Reference | ZF 4656.183.268 (genuine) |
Compatibility
This genuine ZF 4656.183.268 part is engineered for the WG 160 Series transmission family. It is also compatible with the following ZF models that share the same housing architecture: WG 180, WG 200, WG 150, and WG 210. The part is not interchangeable with earlier WG 120 or later WG 250 series due to differences in the TRANSMISSION HOUSING bolt pattern. Always verify your transmission serial number against the OEM parts catalog before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101057 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201078 | HOUSING REAR PART | Rear housing section for output bearing |
| 4656298050 | HOUSING REAR SECTION | Extended rear housing for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 4656301148 | FIXING PLATE | Retains bearing in position |
| 0636100817 | CAP SCREW | M10 x 30 mm housing bolt |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M8 x 20 mm cover bolt |
Frequently Asked Questions
Q: Can I install the 4656.183.268 without replacing the HOUS.FRONT SECT?
A: Yes, but only if the front section shows no scoring or warpage. We recommend replacing both simultaneously if the transmission has exceeded 500,000 km or 10,000 operating hours.
Q: How do I confirm this part fits my WG 160 transmission?
A: Check the stamped serial number on the TRANSMISSION HOUSING. If the number begins with “WG160-” and the housing has 12 bolt holes on the rear face, this part is compatible.
Q: What torque specification should I use for the CAP SCREW when securing this component?
A: Apply 45 Nm ± 3 Nm using a calibrated torque wrench. Always use new cap screws and apply medium-strength 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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