Overview
The ZF 4656.185.087 is a critical OEM genuine component engineered specifically for the WG115 and WG160 series transmissions. This part functions as a precision-machined internal guide or support element within the valve body or clutch housing assembly, ensuring correct oil flow and mechanical alignment during gear shifts. The SKU 4656.185.087 is designed to maintain hydraulic pressure integrity, directly influencing shift quality and overall transmission durability. When installed alongside the 4656201085: HOUS.FRONT SECT, it forms a sealed unit that prevents cross-contamination between hydraulic circuits.
Symptoms of Failure
- Delayed or harsh shifting: A worn 4656.185.087 can cause erratic clutch engagement, leading to noticeable lag or jarring shifts during acceleration.
- Internal transmission oil leaks: Degraded sealing surfaces allow ATF to bypass, resulting in low fluid levels and visible drips under the vehicle.
- Intermittent gear slipping: As the part loses dimensional stability, hydraulic pressure drops, causing the transmission to momentarily lose drive in specific gears.
- Unusual whining or grinding noises: Metal-on-metal contact from a misaligned component produces audible high-pitched sounds during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.185.087 |
| 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 | 18.2 mm |
| Surface Finish | Ground, Ra ≤ 0.4 µm |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This genuine ZF part is primarily designed for the WG115 and WG160 transmission series. It also fits select variants of the WG180 and WG200 models where the valve body architecture shares the same mounting geometry. Always verify the part number against your transmission’s serial plate. For proper installation, the 0631306816: CYLINDRICAL PIN must be aligned correctly, and the 4656301148: FIXING PLATE should be torqued to specification using the 0636100817: CAP SCREW.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656201085 | HOUS.FRONT SECT | Front housing section for clutch assembly |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise component positioning |
| 4656301148 | FIXING PLATE | Secures internal components against vibration |
| 0636100817 | CAP SCREW | High-tensile fastener for housing retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4656301017 | SCREEN SHEET | Secondary filter for debris protection |
| 0636100803 | CAP SCREW | M8 cap screw for valve body mounting |
| 4656301047 | OIL FEED.HOUSG. | Distributes pressurized oil to clutch packs |
| 0736300233 | TORX SCREW | Tamper-resistant screw for cover plates |
| 4656301023 | GASKET | Seals mating surfaces to prevent fluid loss |
Frequently Asked Questions
Q: Can the 4656.185.087 be reused after removal?
A: No. This is a wear-critical component. ZF recommends replacement with a new OEM part during any major transmission overhaul to guarantee proper sealing and alignment.
Q: How do I confirm this part fits my WG115 transmission?
A: Check the transmission model tag located on the bell housing. The WG115 and WG160 both use this part, but verify the serial number prefix matches your unit. If in doubt, cross-reference with the 4656301148: FIXING PLATE mounting pattern.
Q: What torque should be applied to the cap screws when installing this part?
A: For the 0636100817: CAP SCREW, use 25 Nm (18.4 lb-ft) with thread locker. Always consult the ZF service manual for your specific transmission variant.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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