Overview
The ZF 4616.131.020 FILLER NOZZLE is a precision-engineered component designed specifically for the WG 65 series transmission. This OEM genuine part serves as the primary fluid entry point, directing transmission oil into the hydraulic circuit with controlled flow. Located on the upper section of the main casing, the filler nozzle integrates seamlessly with the TRANSMISSION HOUSING to ensure proper lubrication and cooling of internal gears. The SKU 4616.131.020 guarantees exact fitment and material compatibility for demanding industrial applications.
Symptoms of Failure
- Oil leaks around the filler neck: A worn or cracked nozzle often causes visible fluid seepage, leading to low transmission oil levels and potential overheating.
- Gear slipping under load: Insufficient oil flow due to a damaged nozzle can starve the hydraulic system, resulting in erratic gear engagement and power loss.
- Contaminated fluid ingress: A degraded seal at the nozzle interface allows dirt and moisture to enter the transmission, accelerating internal wear.
- Erratic shift timing: Inconsistent oil delivery from a failing nozzle disrupts clutch pack pressure, causing delayed or harsh shifts during operation.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.131.020 |
| Material | Aluminum alloy with corrosion-resistant coating |
| Weight | 0.12 kg (0.26 lbs) |
| Overall Length | 85 mm |
| Inlet Diameter | 22 mm |
| OEM Reference | ZF 4616.131.020 |
| Thread Type | M18 x 1.5 |
Compatibility
This filler nozzle is engineered for the WG 65 series and is also compatible with ZF WG180, WG200, and WG250 transmission models that share the same fluid routing architecture. It directly interfaces with the HEXAGON SCREW (0636011038) and HEXAGON SCREW (0636011118) for secure mounting, while the HEXAGON SCREW (0636016015) provides additional structural support in the assembly. Always verify your transmission model number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011038 | HEXAGON SCREW | Fastener for nozzle mounting |
| 0636011118 | HEXAGON SCREW | Secondary mounting fastener |
| 0636016015 | HEXAGON SCREW | Structural support fastener |
| 0631306085 | CYLINDRICAL PIN | Alignment pin for housing |
| 0634313118 | O-RING | Seal for fluid connections |
| 0636304019 | SCREW PLUG | Port closure for maintenance |
| 0634801152 | SEALING RING | Leak prevention at joints |
| 0732611049 | FILTER INSERT | Oil filtration element |
| 0634303718 | O-RING | Secondary sealing component |
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