Overview
The ZF 4657.131.018 FILLER NOZZLE is a precision-engineered fluid delivery component designed for the WG190 and WG210 series transmissions. This OEM genuine part serves as the primary oil fill point, directing transmission fluid into the main sump via the TRANSMISSION HOUSING. Manufactured to ZF’s exacting tolerances, the filler nozzle ensures a clean, controlled flow of lubricant during service intervals, preventing aeration and spillage. The SKU 4657.131.018 is machined from corrosion-resistant alloy to withstand constant exposure to hot transmission oil and road debris.
Symptoms of Failure
- Transmission fluid leaking from the fill port area – A cracked or deformed nozzle allows oil to weep past the seal, leaving puddles under the vehicle.
- Difficulty filling or overfilling the transmission – A clogged or damaged filler nozzle disrupts the proper flow rate, leading to inaccurate fluid levels and potential gear slipping.
- Contaminated oil entering the system – A broken nozzle can allow dirt or moisture to bypass the cap, accelerating wear on internal components like the HOUS.FRONT SECT.
- Whining noise from the transmission pump – Air ingestion through a faulty filler nozzle causes cavitation, reducing hydraulic pressure and generating abnormal sounds.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4657.131.018 |
| Material | Zinc-alloy die-cast with corrosion-resistant coating |
| Overall Length | 85 mm (3.35 in) |
| Inlet Diameter | 22 mm (0.87 in) |
| Mounting Thread | M18 x 1.5 |
| Weight | 0.12 kg (0.26 lbs) |
| OEM Reference | ZF 4657.131.018 |
| Seal Type | Integrated O-ring groove (O-ring not included) |
Compatibility
This filler nozzle is engineered for the ZF WG series of off-highway and industrial transmissions. It is a direct fit for the WG 190 Series and WG 210 Series models. Based on the part’s design and port location, it is also compatible with the WG 180, WG 200, and WG 220 transmissions when used in conjunction with the HOUSING REAR PART or the HOUSING REAR SECTION. Always verify your transmission model’s housing configuration before ordering.
Frequently Asked Questions
Q: Can I reuse the old O-ring when installing the 4657.131.018 filler nozzle?
A: No. ZF recommends replacing the O-ring (sold separately) every time the nozzle is removed to guarantee a leak-free seal against the transmission housing.
Q: Will this nozzle fit a WG180 transmission with a rear PTO?
A: Yes, the filler nozzle is compatible with WG180 models, provided the HOUSING REAR SECTION is the standard variant. PTO installations do not interfere with the fill port location.
Q: What torque should I apply to the filler nozzle?
A: Tighten the nozzle to 25 Nm (18.4 lb-ft). Over-torquing can crack the zinc-alloy body, while under-torquing may cause oil leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing that encloses all gear sets and shafts |
| 4657201166 | HOUS.FRONT SECT | Forward section of the transmission housing, supports input shaft |
| 4657201170 | HOUSING REAR PART | Rear housing segment that mounts the output flange |
| 4657298102 | HOUSING REAR SECTION | Alternate rear housing component for specific WG variants |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing assembly |
| 0636100801 | CAP SCREW | Fastener for securing housing sections together |
| 4656301148 | FIXING PLATE | Locking plate that prevents fastener loosening |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil pickup in the sump |
| 4657301033 | SCREEN SHEET | Secondary mesh filter for high-flow oil circuits |
| 0636100803 | CAP SCREW | Heavy-duty bolt for final drive housing attachment |
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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