Overview
The ZF 4657.131.002 FILLER NOZZLE is a precision-engineered fluid delivery component designed for the WG190 and WG210 series transmissions. This OEM genuine part serves as the critical interface for introducing transmission fluid into the main housing assembly. Positioned directly on the upper section of the transmission casing, the filler nozzle ensures controlled, splash-free oil filling during maintenance or rebuild operations. The SKU 4657.131.002 is manufactured to exact ZF tolerances, guaranteeing a secure seal and proper alignment with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to prevent contamination ingress.
Symptoms of Failure
- External oil seepage around the fill port: A worn or cracked filler nozzle allows transmission fluid to escape, leaving visible drips or wet spots on the HOUSING REAR PART and surrounding bell housing.
- Difficulty achieving proper fluid level: A deformed nozzle neck prevents the dipstick or fill tube from seating correctly, leading to inaccurate fluid readings and potential gear slipping under load.
- Air ingestion during cold starts: Cracks in the nozzle body allow air to mix with the oil, causing erratic shift quality and whining noises from the pump.
- Cross-threaded or stripped fill threads: Repeated over-torquing damages the nozzle threads, making it impossible to secure the fill cap without leaking.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.131.002 |
| Material | Die-cast aluminum with corrosion-resistant coating |
| Overall Length | 95 mm |
| Thread Size | M22 x 1.5 (fill port side) |
| Weight | 0.12 kg |
| OEM Reference | ZF 4657.131.002 |
| Seal Type | Integrated O-ring groove (O-ring not included) |
Compatibility
This filler nozzle is engineered for ZF WG-series transmissions, specifically the WG190 and WG210 models. It is also compatible with the WG180 and WG200 variants when used in conjunction with the correct CYLINDRICAL PIN for alignment. The part fits all standard fill tube configurations and is a direct replacement for units requiring a threaded fill port on the upper housing section.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4657201027 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4657201012 | HOUSING REAR PART | Rear section of the transmission housing |
| 0631306792 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 0636100801 | CAP SCREW | Fastener for housing attachment |
| 4656301148 | FIXING PLATE | Retaining plate for internal components |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh filter for oil circuit |
| 0636100803 | CAP SCREW | Secondary fastener for housing assembly |
| 4681301040 | OIL FEED.HOUSG. | Oil supply housing for lubrication system |
Frequently Asked Questions
Q: Can the 4657.131.002 filler nozzle be used on a WG180 transmission?
A: Yes, the nozzle is mechanically compatible with WG180 and WG200 models, though you should verify the fill port thread pitch matches your specific housing variant.
Q: Does this part include the O-ring seal?
A: No, the filler nozzle is supplied without an O-ring. We recommend ordering a separate seal kit to ensure a leak-free installation.
Q: How do I confirm the nozzle is seated correctly?
A: The nozzle should align flush with the housing surface. Use the CYLINDRICAL PIN to guide the nozzle into position before tightening the retaining screws.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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