Fuel drain part number

DesertNomad

DesertNomad

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DesertNomad
What is the difference between CCA-1550 and CCA-36150 Curtis fuel drain valves? The latter seems to be Cadmium plated... is that any better or worse than straight brass?
 
They are close to the same, but 36150 is Cadmium plated brass whereas 1550 is only brass. My shop on the field here used a 36150 with a bit of teflon tape around the threads. Just wondering if the Cadmium or tape is going to affect anything.

I have read that one should not use teflon tape, but the guy who did it is an AP/IA so I'm sure he knows more than me about this stuff.

This is the on-field shop and I normally take my plane elsewhere for service.
 
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DesertNomad said:
They are close to the same, but 36150 is Cadmium plated brass whereas 1550 is only brass. My shop on the field here used a 36150 with a bit of teflon tape around the threads. Just wondering if the Cadmium or tape is going to affect anything.

I have read that one should not use teflon tape, but the guy who did it is an AP/IA so I'm sure he knows more than me about this stuff.

This is the on-field shop and I normally take my plane elsewhere for service.
Click to expand...
By the book Teflon tape should not be used on a fuel system. In practice if you keep the tape off the first two threads it won’t get in the system during assembly. One has to be a bit careful about removing all tape bits on disassembly.

I might casually discuss it with an A&P that used tape on a fuel system. Or I might get assertive about it depending on what I know or don’t know about his/her skills.
 
I always use Fuel Lube on oil and fuel line threads on my plane. A new product that's like Fuel Lube is called something else, but I can't remember what the name is right now.
 
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