What is the Eaton Carter 64250 Nozzle, and what makes it unique? 
The 64250 is a heavy-duty, single-point ground fueling nozzle designed for high-demand environments with full compatibility with earlier models (64348, 64349, and 64200). Its key features include:
- Enhanced durability – Solid aluminum adapter ring and field-replaceable wear pads.
- Reliable sealing – Floating nose seal adapts to worn aircraft adapters.
- Easy maintenance – Modular design allows quick disassembly and part replacement.
Where is the 64250 nozzle typically used?
Ideal for commercial aviation, the nozzle connects to standard 3-lug aircraft adapters.
What fuels are compatible with the 64250 nozzle?
The nozzle supports aviation fuels, including Jet A, Jet A-1, JP-4, JP-5, and JP-8, meeting commercial fueling standards.
How long does the 64250 nozzle last?
Lifespan depends on usage and maintenance. Routine inspections and replacement of wear pads and seals can extend service life for several years.
How does the nozzle perform in extreme weather conditions?
Engineered for -40°F to 120°F (-40°C to 49°C), the self-adjusting nose seal ensures a leak-free connection despite temperature fluctuations.
What industry certifications does the 64250 nozzle comply with?
The nozzle meets SAE AS5877, SAE ARP5298, and NATO STANAG 3105 standards, ensuring compliance with commercial aviation fueling requirements.
How does the 64250 compare to other nozzles?
- Greater durability – Solid aluminum adapter ring and replaceable wear pads.
- Better sealing – Floating nose seal adjusts to worn adapters.
- Easier maintenance – Modular design allows quick part replacement.
- Seamless compatibility – Works with older Eaton Carter models (64200, 64348, 64349).
Are there environmental or fuel-saving features?
Yes. The pressure-loaded nose seal minimizes fuel loss, while Hose End Control Valves (HECVs) regulate fueling pressure, reducing fuel waste.
What upgrade options are available?
- Hose End Control Valves (HECVs) – 35, 45, 55 psi options.
- Quick Disconnect (QD) Adapters – For various fueling setups.
- Bonding cables & vacuum breakers – Enhanced safety features.
- Wear-resistant handles & stowage brackets – For improved handling and storage.
How do I maintain the 64250 nozzle?
- Routine inspections – Check for cracks, wear patterns, and fuel leaks monthly.
- Sacrificial parts replacement – Replace nose seals every 500 cycles, O-rings/washers biannually.
- Tool requirements – Use calibrated torque wrenches (10-15 ft-lbs) and poppet gauges for adjustments.
- Reassembly protocol – Apply Loctite 242 to adapter ring screws (Page 12 of service manual).
What are best practices for cleaning and storage?
- Flush with clean aviation fuel after each use
- Use lint-free wipes to clean sealing surfaces
- Store in a dry, clean environment with dust caps on
Does the nozzle require calibration?
The nozzle itself doesn't need calibration, but HECVs should be checked every 6 months for proper pressure regulation.
What lubricants are recommended?
- Petroleum-based lubricants for bearings and washers
- Silicone grease for seals and O-rings
- Avoid over-lubrication, as excess grease can attract contaminants
How do I properly dispose of worn parts?
- Recycle metal components like the adapter ring and crank arm
- Dispose of seals, washers, and O-rings as hazardous waste if fuel-contaminated
- Contact Becker Aviation for disposal programs
How can I test the nozzle after maintenance?
- Leak Test: Pressurize at 5 psi, 60 psi, and 120 psi to check for leaks
- Functional Test: Attach to a test adapter and cycle the crank arm five times
- Interlock Test: Ensure it only operates when properly connected
How do I fix common issues?
| Issue |
Potential Cause |
Solution |
| Leaking nozzle |
Worn nose seal, loose O-rings |
Replace seals, verify O-ring fit |
| Difficult connection |
Interlock misalignment, worn nose seal |
Inspect and adjust interlock system |
| Excessive wobble |
Worn washers, improperly seated components |
Replace washers and reseat components |
| Unusual noises |
Air leaks, damaged O-rings |
Check for sealing issues and replace |
Where can I get replacement parts?
Becker Aviation provides OEM-certified replacement parts for all sacrificial components and upgrades.
Can I use parts from older models?
Yes, the 64250 is fully compatible with parts from 64200, 64348, and 64349.
Where can I get technical support or training?
- Becker Aviation offers manuals, service guides, and hands-on training
- Video tutorials cover maintenance, troubleshooting, and reassembly
- On-site or virtual training available for fueling safety and nozzle operation
What signs indicate urgent maintenance is needed?
- Fuel dripping when closed - Possible internal leakage
- Difficulty attaching/detaching - Worn nose seal or interlock issue
- Stiff or unresponsive crank arm - Possible internal corrosion
- Visible cracks or damage - Requires immediate replacement
- Loose hardware - Tighten or replace missing fasteners
What happens if non-compatible fuel is used?
- Seal damage: – Non-approved fuels can degrade seals and O-rings
- Contamination risk – Residue can clog aircraft fuel systems
- Performance issues – Incorrect fuels may alter flow efficiency
Emergency Action: Flush nozzle with aviation fuel, inspect seals, and replace damaged parts.
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Frequently Asked Questions - Eaton Carter 64250 Underwing Fueling Nozzle
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