Group,
The
"Russell" fitting from "Summit"
appears to come with a soft aluminum sealing
washer..........All
the stock oil fittings on the "Mazda" engines (engine,
oil cooler, etc)
have a
aluminum or copper sealing washer...........FWIW
Kelly
Troyer
"DYKE DELTA JD2" (Eventually)
"13B
ROTARY"_ Engine"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold
"TURBONETICS"_TO4E50
Turbo
From:
Steven W. Boese <SBoese@uwyo.edu>
To:
Rotary motors in aircraft
<flyrotary@lancaironline.net>
Sent:
Friday, July 1, 2011 12:03 AM
Subject:
[FlyRotary] Re: GSL393/74028 Fuel Pump
Replacement/Fuel Leak
Scott,
I have used the pumps with the 10mmx1.0
connection without leak problems. I use a soft
aluminum or soft copper crush washer between the
pump and fitting, not a rubber o-ring. The mating
surfaces should be square and smooth and could be
retooled in a lathe if needed. The thread is a
straight thread, not tapered, so it doesn't seem
like trying to seal the joint in the threads with
tape or other sealant would work very well.
Steve Boese
Sent:
Wednesday, June 29,
2011 9:56 PM
Subject:
[FlyRotary]
GSL393/74028 Fuel Pump
Replacement/Fuel Leak
I
have inline fuel
pumps from Tracy
from a while
back. They were
from Napa and
were the 74028
flavor(
http://www.summitracing.com/parts/CRT-P74028/?rtype=10
seems most like
them currently )
Tracy used to
provide.
The fixed hose
barb side of
course does not
leak, but on the
screw fitting
side I have a
10mmx1.0(
http://www.summitracing.com/parts/RUS-670480/
) with an o-ring
and everytime I
think I have the
fuel drip fixed
and start the
pump without the
engine it
doesn't leak.
But, after a
short engine run
the drip
returns.
As I burned out
one of the pumps
already(
important safety
note make sure
the fuel
selector valve
is not off while
you have the
pump turned on
and are checking
for leaks ) and
will need to
replace it what
other inline
pumps have folks
been using? The
74028 flavor
fuel pumps, the
10mm fits but
does not seal.
I did not use
thread tape or
other thread
sealer. And no
amount of
tightening seems
to keep it from
leaking again.
Thoughts on a
fuel pump
substitute? Way
to seal that
fitting to the
existing 74028
pump?
Thank You.
-Scott
http://n820wa.blogspot.com/2011/06/engine-runs.html
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