ZF 4642.131.038 FILLER NOZZLE for WG150 | OEM Genuine Part

Overview

The ZF 4642.131.038 FILLER NOZZLE is a precision-engineered component designed for the WG150 transmission series. This OEM genuine part serves as the critical fluid entry point, directing transmission oil into the main housing during filling and servicing operations. Positioned on the upper section of the transmission assembly, the filler nozzle ensures a controlled, debris-free flow of lubricant into the system. The SKU 4642.131.038 is manufactured to ZF’s exacting tolerances, guaranteeing a secure seal and preventing contamination of the hydraulic circuit. When paired with a robust TRANSMISSION HOUSING, this nozzle maintains the integrity of the oil delivery path, which is essential for consistent clutch pack engagement and torque converter performance.

Symptoms of Failure

• External oil seepage around the fill port: A worn or cracked filler nozzle often leads to slow, persistent oil leaks near the top of the transmission, visible as wet residue on the TRANSMISSION HOUSING.
• Difficulty achieving proper fluid level: If the nozzle is deformed or clogged, technicians may struggle to fill the transmission accurately, resulting in overfilling or underfilling conditions that cause gear slipping.
• Air ingestion into the hydraulic system: A compromised seal at the nozzle interface allows air to mix with the oil, leading to foaming, erratic shift quality, and whining noises from the pump.
• Contaminated fluid entry: Cracks in the plastic or metal nozzle body can allow dirt and moisture to bypass the filter, accelerating wear on internal components like the SHIFT SYSTEM.

Technical Specifications

Compatibility

While primarily designed for the WG150 series, the 4642.131.038 filler nozzle is also compatible with several ZF off-highway transmission models that share the same fill port geometry. This includes the WG180, WG200, and WG210 series, as well as certain variants of the WG120 and WG160 transmissions. Always verify the thread pattern and mounting boss on your specific TRANSMISSION HOUSING before installation. For proper identification, refer to the TYPE PLATE affixed to your unit, and secure the nozzle using the appropriate GROOVED STUD for a vibration-resistant fit.

Related Components