Overview
The ZF 4656.185.015 is a critical OEM genuine component engineered specifically for the WG115 and WG160 transmission series. This precision-machined part functions as a key interface element within the valve body or hydraulic control assembly, ensuring proper fluid routing and pressure regulation during gear shifts. As an original ZF part, SKU 4656.185.015 guarantees exact fitment and durability under heavy-duty industrial loads. It works in concert with the TRANSMISSION HOUSING to maintain structural integrity and oil flow consistency throughout the transmission system.
Symptoms of Failure
- Erratic gear engagement or delayed shifting — When the 4656.185.015 wears, hydraulic pressure drops cause hesitation when moving between forward and reverse gears, especially under load.
- Transmission fluid seepage around the valve body area — Degraded sealing surfaces on this part lead to slow oil leaks that accumulate on the bell housing, often mistaken for main seal failure.
- Intermittent slipping under heavy torque — A worn 4656.185.015 fails to maintain proper clutch pack pressure, resulting in momentary power loss during acceleration in WG115/WG160 units.
- Harsh or clunking shifts — Internal wear causes pressure spikes, producing audible metallic noises when the transmission upshifts or downshifts.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.185.015 |
| Material | High-grade aluminum alloy with hardened steel inserts |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 145 mm x 72 mm x 38 mm |
| Surface Finish | Anodized corrosion-resistant coating |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF 4656.185.015 part is designed for the WG115 and WG160 transmission families. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct HOUS.FRONT SECT and HOUSING REAR PART. For WG200 applications, pairing with the HOUSING REAR SECTION ensures proper alignment. Always verify your transmission model code 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 pump and converter |
| 4656201077 | HOUSING REAR PART | Rear housing for output shaft support |
| 4656298049 | HOUSING REAR SECTION | Extended rear section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | Fastener for housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil intake |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Bolt for valve body attachment |
Frequently Asked Questions
Q: Can the 4656.185.015 be used in a ZF WG180 transmission?
A: Yes, this part is compatible with WG180 units when installed with the correct HOUS.FRONT SECT and rear housing components. Always cross-reference your transmission serial number.
Q: What causes premature failure of this part?
A: Contaminated transmission fluid with metallic debris or excessive heat from prolonged overloading accelerates wear. Regular fluid changes and using OEM filters like the SCREEN SHEET extend service life.
Q: Is the 4656.185.015 sold as a single unit or in a kit?
A: It is sold individually as an OEM genuine part. For a full rebuild, we recommend pairing it with new cap screws such as 0636100817 and the FIXING PLATE for optimal sealing.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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