Overview
The ZF 4656.185.022 ACCESSORIES for WG171 is a critical OEM genuine assembly component designed to support the internal hydraulic and mechanical systems of the WG 171 Series transmission. This accessory kit ensures proper fluid routing and pressure regulation within the transmission housing. The SKU 4656.185.022 is engineered to exact ZF tolerances, providing a direct replacement for worn or damaged accessory components that degrade transmission performance. It integrates seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to maintain structural integrity.
Symptoms of Failure
- Erratic gear engagement and slipping: When the 4656.185.022 accessory assembly wears, internal fluid pressure drops, causing delayed or harsh shifts, especially under load.
- Visible oil seepage around the housing joint: Degraded seals within this accessory set allow transmission fluid to leak past the TUBE connections, leaving puddles under the vehicle.
- Contaminated fluid and debris in the sump: A failing accessory component can shed particles that bypass the SCREEN SHEET, leading to clogged valves and overheating.
- Whining or grinding noises from the transmission: Worn accessories cause misalignment of internal passages, creating audible friction during gear changes.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4656.185.022 |
| Material | Hardened steel / aluminum alloy |
| Weight | 0.85 kg (1.87 lbs) |
| Dimensions (L x W x H) | 120 mm x 45 mm x 30 mm |
| OEM Reference | ZF WG171 Series |
| Surface Finish | Zinc-plated / corrosion-resistant |
Compatibility
This accessory kit is specifically engineered for the ZF WG171 transmission series. It is also compatible with the WG180 and WG200 models that share the same hydraulic circuit architecture. Always verify fitment with your transmission serial number. The part works in conjunction with the O-RING and CAP SCREW to ensure a leak-free seal.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft |
| 4656201015 | SCREEN SHEET | Filter mesh for fluid debris |
| 4656301037 | TUBE | Fluid passage conduit |
| 0634313514 | O-RING | Sealing ring for hydraulic connections |
| 0636100803 | CAP SCREW | Fastener for housing assembly |
| 4656301042 | HOUSING REAR PART | Rear casing for output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0636100801 | CAP SCREW | Secondary fastener for accessory bracket |
| 0636100160 | CAP SCREW | Threaded bolt for oil pan attachment |
Frequently Asked Questions
Q: Can the 4656.185.022 be installed without replacing the TRANSMISSION HOUSING?
A: Yes, this accessory kit is a standalone replacement. However, we recommend inspecting the TRANSMISSION HOUSING for cracks or wear during service.
Q: What causes premature failure of this accessory assembly?
A: Contaminated fluid, over-torqued fasteners, or a damaged SCREEN SHEET can introduce debris that accelerates wear on the 4656.185.022 components.
Q: Is this part compatible with the ZF WG200 transmission?
A: Yes, the WG200 shares the same accessory mounting pattern. Always verify using the CYLINDRICAL PIN alignment for proper fit.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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