Overview
The ZF 4642.131.029 FILLER NOZZLE is a precision-engineered fluid delivery component designed specifically for the WG 150 transmission series. This OEM genuine part ensures accurate and controlled oil flow into the transmission housing during filling and servicing operations. Positioned at the upper port of the main casing, the filler nozzle directs transmission fluid directly into the sump area, preventing aeration and ensuring proper lubrication of internal gears and clutches. The SKU 4642.131.029 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal and long service life under high-temperature operating conditions.
Symptoms of Failure
- External oil seepage around the filler port: A worn or cracked filler nozzle often causes slow fluid leaks that appear as drips or wet spots on the transmission housing, particularly after extended operation.
- Difficulty achieving proper fluid level: When the nozzle degrades, it may not seat correctly, leading to inaccurate dipstick readings and potential overfilling or underfilling of the transmission.
- Contaminated fluid or air ingestion: A damaged nozzle can allow debris or air to enter the lubrication circuit, resulting in erratic gear engagement or whining noises during shifting.
- Fluid spray during filling: If the nozzle tip is broken or misaligned, transmission oil may spray back out of the fill hole instead of flowing smoothly into the sump.
Technical Specifications
| Part Number | 4642.131.029 |
| OEM Reference | ZF 4642.131.029 |
| Material | Die-cast aluminum alloy with corrosion-resistant coating |
| Weight | 0.18 kg (0.40 lbs) |
| Overall Length | 95 mm |
| Inlet Diameter | 22 mm |
| Thread Pitch | M22 x 1.5 |
| Seal Type | Integrated O-ring groove (O-ring not included) |
Compatibility
While the 4642.131.029 filler nozzle is primarily designed for the WG 150 series, it is also compatible with several other ZF WG-series transmissions that share the same filler port geometry. This includes the WG 180, WG 200, and WG 250 models produced between 2005 and 2020. For proper installation, this nozzle works in conjunction with the 4642101047 TRANSMISSION HOUSING and the 4642301207 TRANSMISSION HOUSING, both of which provide the mounting bore. Additionally, the 0730365067 TYPE PLATE should be verified for correct model identification, and the 0631311009 GROOVED STUD is often used to secure adjacent components during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main casing that houses the filler nozzle port |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG series |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for mounting adjacent brackets |
| 4642301168 | SCREEN SHEET | Filter screen for oil intake |
| 4642301169 | SCREEN SHEET | Secondary filter screen variant |
| 0636100621 | HEXAGON SCREW | Bolt for securing housing covers |
| 4642301186 | SCREEN SHEET | Fine mesh screen for oil filtration |
| 4644106300 | SHIFT SYSTEM | Gear selection mechanism assembly |
| 4644306500 | COVER PLATE | Protective cover for shift system |
