Fuel pump fittings

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Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

Thanks,
Evan
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In article ,
Evan Carew wrote:

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Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

Thanks,
Evan
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Normally, fuel pumps have NPT ports, so you uce AN with the appropriate
NPT size on one end.

Evan Carew wrote...

Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

I suppose it depends on what kind of fuel pump you're
referring to. If it's the Delco mechanical pump
on tons o' Lycomings, you need special fittings.
See:

http://www.vansaircraft.com/cgi-bin/...57-268-372&bro
wse=engines&product=pump-fittings

Or if that gets chppoed, go to www.vansaircraft.com,
find the accessory catalog, and search for fuelpump fittings.

Dave 'thread head' Hyde

"Dave Hyde" wrote in message
...
Evan Carew wrote...

Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

I suppose it depends on what kind of fuel pump you're
referring to. If it's the Delco mechanical pump
on tons o' Lycomings, you need special fittings.
See:


http://www.vansaircraft.com/cgi-bin/...57-268-372&bro
wse=engines&product=pump-fittings

Or if that gets chppoed,

Well, not chppoed but chipotled maybe


go to www.vansaircraft.com,
find the accessory catalog, and search for fuelpump fittings.

Dave 'thread head' Hyde

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Orval,

Well, I just received a shipment of standard AN fittings with NPT on one
site & I can say that these definately don't fit. Sigh. Order and wait
another week.

Evan

Orval Fairbairn wrote:
In article ,
Evan Carew wrote:


Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

Thanks,
Evan

Normally, fuel pumps have NPT ports, so you uce AN with the appropriate
NPT size on one end.

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Have you tried an AN fitting in the hole--if it's recessed for an "O"
ring then use
an AN union + O-ring---may have to cut off the flare if it won't go all
the way in.
(they make special fittings like this,(esp. for hydraulic pumps) but I
never have one when I need it

Evan Carew wrote:

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Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

Thanks,
Evan
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Jerry,

What kind of o-ring is used?

Evan

Jerry J. Wass wrote:
Have you tried an AN fitting in the hole--if it's recessed for an "O"
ring then use
an AN union + O-ring---may have to cut off the flare if it won't go all
the way in.
(they make special fittings like this,(esp. for hydraulic pumps) but I
never have one when I need it

Evan Carew wrote:


Do I need to get those special (straight thread) fittings for my fuel
pump or are the regular NPT AN fittings good enough.

Thanks,
Evan
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Evan Carew wrote...

What kind of o-ring is used?

*sigh*

http://www.aircraftspruce.com/catalo...ycfuelpump.php
See bottom of page.

http://www.wicksaircraft.com/catalog...641/index.html

http://www.vansaircraft.com/cgi-bin/catalog.cgi
and search for 'fuel pump fittings'

http://www.chiefaircraft.com/cgi-bin...search-air.cgi
and search for 'fuel pump hardware'

I'm sure there are more.

Dave 'fitting end' Hyde

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Dave,

Yeah, I've been to those exact pages, & will note for the record that
none of those pages mention an o-ring for sale, however, the pictures do
indicate that the parts come with said o-ring. If not, like I said, I
would like to know the particulars for when I go a calling the very well
informed A&S sales people (tongue firmly in cheek here).

Dave Hyde wrote:
Evan Carew wrote...


What kind of o-ring is used?


*sigh*

http://www.aircraftspruce.com/catalo...ycfuelpump.php
See bottom of page.

http://www.wicksaircraft.com/catalog...641/index.html

http://www.vansaircraft.com/cgi-bin/catalog.cgi
and search for 'fuel pump fittings'

http://www.chiefaircraft.com/cgi-bin...search-air.cgi
and search for 'fuel pump hardware'

I'm sure there are more.

Dave 'fitting end' Hyde






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Evan Carew wrote...

Yeah, I've been to those exact pages, & will note for the record that
none of those pages mention an o-ring for sale...

You might note that none of the fittings pictured are
simple 37 deg flare to NPT fittings - there's
a wider bearing surface for the O-ring/NPT end.
The Lycoming standard solution does _not_ appear to
be to stuff an O-ring over an NPT fitting, cut down
or otherwise.

Dave 'field mod' Hyde