Overview
The ZF 4642.131.055 FILLER NOZZLE is a precision-engineered fluid delivery component designed specifically for the WG150 series transmission. This OEM genuine part serves as the primary oil fill point, directing transmission fluid into the main sump through the TRANSMISSION HOUSING assembly. Constructed from corrosion-resistant alloy, the filler nozzle ensures a secure, leak-free interface during fluid replenishment and thermal expansion cycles. The SKU 4642.131.055 is machined to exact ZF tolerances, guaranteeing a snug fit that prevents contamination ingress and maintains hydraulic pressure integrity within the WG150 system.
Symptoms of Failure
- Transmission fluid seepage around the fill port: A worn or cracked 4642.131.055 nozzle often causes slow oil leaks at the top of the housing, leading to low fluid levels and eventual gear slipping.
- Difficulty achieving proper fluid fill volume: Deformation or blockage in the filler nozzle prevents complete oil charging, resulting in erratic shift quality and overheating during heavy loads.
- Visible corrosion or thread stripping: Exposure to heat and debris can degrade the nozzle’s threads, causing cross-threading when attaching a fill pump and introducing air into the hydraulic circuit.
- Whining noise from the transmission pump: Air ingestion through a compromised filler nozzle creates cavitation, producing a high-pitched whine that worsens under acceleration.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.131.055 |
| Material | Zinc-plated steel with nitrile seal |
| Overall Length | 95 mm |
| Thread Size | M22 x 1.5 |
| Weight | 0.12 kg |
| OEM Reference | ZF 4642.131.055 |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
While the 4642.131.055 filler nozzle is primarily validated for the WG150 transmission, its design shares mounting geometry with several ZF heavy-duty models. Compatible units include the WG180, WG200, and WG250 series, where the nozzle interfaces with the TRANSMISSION HOUSING casting. For exact fitment verification, always cross-reference the TYPE PLATE affixed to your transmission. The nozzle also pairs with the GROOVED STUD that secures the fill tube bracket on earlier WG variants.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG180/200 series |
| 0730365125 | TYPE PLATE | Identification tag with model and serial number |
| 0631311009 | GROOVED STUD | Threaded fastener for filler tube bracket |
| 4642301168 | SCREEN SHEET | Filter mesh for oil sump intake |
| 4642301169 | SCREEN SHEET | Fine-mesh debris barrier for hydraulic circuit |
| 0636100621 | HEXAGON SCREW | M10 bolt for housing flange retention |
| 4642301186 | SCREEN SHEET | Secondary filter element for high-pressure oil |
| 4644106324 | SHIFT SYSTEM | Hydraulic valve body and actuator assembly |
| 4644306598 | PLATE | Cover plate for shift system access port |
