Overview
This OEM genuine ZF 4657.131.015 FILLER NOZZLE is a precision-engineered component designed specifically for the WG191 and WG211 transmission series. It serves as the critical fluid entry point, directing automatic transmission fluid (ATF) into the torque converter and hydraulic control circuits. The filler nozzle ensures a steady, aerated-free flow of oil during assembly and refill procedures, preventing cavitation and pressure loss. The SKU 4657.131.015 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-proof seal and consistent lubrication across all internal rotating assemblies.
Symptoms of Failure
When the 4657.131.015 filler nozzle degrades, operators often notice external oil seepage around the bell housing—a common long-tail search query for “ZF WG191 oil leak at filler tube.” Another frequent symptom is erratic gear engagement or delayed shifting, caused by insufficient fluid volume reaching the valve body. You may also detect whining or cavitation noises from the torque converter as air enters the system through a cracked nozzle. Finally, low transmission fluid warnings that persist after topping off often point to a worn filler nozzle seal.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.131.015 |
| OEM Reference | ZF 4657.131.015 |
| Material | Die-cast aluminum with nitrile O-ring |
| Overall Length | 145 mm |
| Inlet Diameter | 22 mm |
| Outlet Diameter | 16 mm |
| Weight | 0.18 kg |
| Seal Type | Integrated O-ring (replacement: 0630532183 INDENTED RING) |
Compatibility
This filler nozzle is engineered for the ZF WG180, WG200, WG191, and WG211 series transmissions. It is a direct fit for all WG191 and WG211 variants, including those used in off-highway trucks, wheel loaders, and agricultural tractors. The nozzle also retrofits to earlier WG180 and WG200 models when paired with the correct 4657120005 PRESSURE REGULATOR and 0501211384 VALVE assembly. Always verify your transmission housing code before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657120005 | PRESSURE REGULATOR | Maintains hydraulic pressure within the valve body |
| 0501211384 | VALVE | Controls fluid routing to clutch packs |
| 0630532183 | INDENTED RING | Secures filler nozzle in housing bore |
| 4656306145 | PISTON | Actuates clutch engagement via hydraulic pressure |
| 0732042767 | COMPRESSION SPRING | Provides return force for valve spools |
| 0631612064 | SET SCREW | Adjusts pressure regulator preload |
| 0631610026 | SET SCREW | Locks valve body alignment |
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4657301130 | HOUS.FRONT SECT | Front section of transmission housing |
| 4657301131 | HOUSING REAR PART | Rear section of transmission housing |
Frequently Asked Questions
Q: Can I install the 4657.131.015 filler nozzle without replacing the indented ring?
A: ZF recommends always replacing the 0630532183 INDENTED RING simultaneously, as the old ring may deform and cause fluid bypass.
Q: Is this nozzle compatible with the ZF WG180 series?
A: Yes, it fits WG180 models when used with the correct 4657120005 PRESSURE REGULATOR and 4656306145 PISTON assembly.
Q: What torque specification should I use for the filler nozzle retaining bolt?
A: Tighten to 25 Nm. Over-torquing can crack the nozzle body; under-torquing may cause the 0631612064 SET SCREW to loosen during operation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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