Operation Manual

30
Diesel fuel flow sensor kit Installation and Operation Manual
NAVMAN
5
7
6
Install the required fittings to the straight
through pipe (for flare joints use a barrel union
fitting):
1 Apply thread sealer to the fitting’s ¼ NPT
threads.
Warning: Make sure pieces of the
threadseal tape or paste can not break
off and enter the fuel pipe (see section
7-2-5).
2 Screw each fitting in to the through pipe.
Use a spanner or wrench on the fitting and
another on the flats of the through pipe.
It does not matter which way round the through
pipe goes in the fuel line.
To attach a flare joint at the other end of the
sensor, repeat steps 3 and 4 above to bend
and cut the pipe, fit a flare nut and flare the
end of the pipe. Cut the pipe to length so the
flared end will meet the fittings on the sensor
port exactly. The exact amount you cut out will
depend on how much pipe length was used
up in the bends.
Otherwise, attach a different type of fitting
following the manufacturer’s instructions.
Hold the sensor in place and hand tighten the
fittings to check that the pipe lines up with the
sensor port and there is little strain on the joints.
Adjust the pipe bends so that the sensor will sit
flat against your chosen mounting surface.
Hold sensor in place
Put the flare nut on the pipe first!! Then flare
the end of the pipe using the flaring tool. Inspect
the inside face of the flared pipe - it must be
smooth and scratch-free. If it is not, cut the end
of the tube off and try again.
Put flare nut on first
4
Flare end of tube
Fit the straight through pipe. Tighten each fitting
with the correct tools (for a flare joint, use a
spanner or wrench on the flare nut and on the
barrel union). The fitting needs to be tight to
prevent leakage. Replace any pipe clamps that
you removed earlier.
Note: Leave the flare nut on the outlet side
of the install pipe loose now (see section 7-4,
step 5).