Overview
The ZF 4656.185.063 is a precision-engineered OEM genuine component designed specifically for the WG 160 series transmission. This part functions as a critical sealing and alignment element within the gearbox assembly, ensuring proper oil circulation and preventing contamination between the transmission housing and the rotating shaft assembly. The SKU 4656.185.063 is manufactured to ZF’s original factory tolerances, guaranteeing a direct fit and long service life. It sits in the mid-section of the transmission, interfacing directly with the 4656101056: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT to maintain structural integrity under high torque loads.
Symptoms of Failure
- Oil seepage at the housing joint: When the 4656.185.063 wears out, you may notice transmission fluid weeping from the seam between the front and rear housing sections, especially after extended highway operation.
- Gear engagement hesitation: A worn part can cause slight misalignment in the shift linkage, leading to delayed or rough engagement when shifting from neutral to drive in WG 160 series units.
- Unusual whining noise during acceleration: Deterioration of this component often produces a high-pitched metallic whine under load, indicating that the 4656201077: HOUSING REAR PART is no longer properly seated.
- Contaminated transmission fluid: A failing seal allows debris from the 4656298049: HOUSING REAR SECTION to mix with the oil, causing dark, gritty fluid that accelerates internal wear.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4656.185.063 |
| OEM Reference | ZF 4656.185.063 (Genuine) |
| Material | Hardened alloy steel with nitrile coating |
| Weight | 0.85 kg (1.87 lbs) |
| Outer Diameter | 185 mm |
| Inner Diameter | 63 mm |
| Thickness | 12.5 mm |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This genuine ZF part is primarily designed for the WG 160 series transmission, but it also fits the following ZF models when used with the correct housing components: WG 180, WG 200, and WG 210 series. It is not compatible with older WG 120 or WG 150 units without modification to the TRANSMISSION HOUSING. Always verify the serial number on your existing part before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201077 | HOUSING REAR PART | Rear housing section for output assembly |
| 4656298049 | HOUSING REAR SECTION | Complete rear housing unit with bearing seats |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowel holes |
| 4656301148 | FIXING PLATE | Secures bearing race in position |
| 0636100817 | CAP SCREW | M10 bolt for housing fastening |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil pickup |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M8 bolt for cover plate attachment |
Frequently Asked Questions
Q: How do I know if the 4656.185.063 is the correct part for my WG 160 transmission?
A: Check the stamped part number on the side of your existing component. If it reads 4656.185.063, this is a direct OEM replacement. You should also inspect the TRANSMISSION HOUSING for any cracks before installation.
Q: Can I install this part without removing the entire transmission?
A: In most cases, yes. The 4656.185.063 is accessible after removing the rear housing section. However, you will need to drain the fluid and support the HOUSING REAR PART with a jack to avoid misalignment.
Q: What torque specification should I use for the cap screws when reinstalling?
A: For the CAP SCREW (M10), use 45 Nm. For the CAP SCREW (M8), use 25 Nm. 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 |
Request a Quote →
