vision microsystems VM1000 - 1.10 FUEL LEVEL SYSTEM INSTALLATION; Fuel Level Probe and Indicator Installation

22 SECTION
I INST'AI,I.,AT'ION
1.10
FUEL LEVEL
SYSTEM
INSTALLATION
1.10.1 FUEL
LEVEL
SYSTEM
INDICATOR
INST.
(P/N
4010028)
The indicator
is simply
installed
by
following
instructions
in
section
titled
DPU,
INDICATOR
and
MODE
SWITCH
installation
1.10.2
FUEI-
LEVEL
MOUNTING
KIT
INST.
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DO
NOT INSTALL
PROBE
INTO
METAL
MOUNT]NG
FLANGE
WITHOUT
FIRST
APPLYING
THREAD LUBRICANT
OR
DAMAGE
WILL
OCCUR'
INSURE ALL THREADS
ARE
FREE
FROM
BURRS
AND DEBRIS.
WIRE
LEADS
OF PROBE
ARE
FRAGILE
AND
MUST
NOT
BE
PULLED,
TURNED
STRAINED
IN ANY
WAY
OR DAMAGE
WILL
OCCUR
AND
VOID WARRAN
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The Fuel Level
Probes
are
designed
to be
installed
in
virtually all
types of
wing tank
configurations.
The basic
obiectives
are
to
install
the
probe
so that
it
can
'sense'the
fuel
level
change
from
full tank
to
empty
tank
(
i.e., the
probe
is
wetted the
least
at emotv
tank
and
is
wetted
the most
at
full
tank
)
and
to
position
it in such
a manner
as lo
allow
insertion
and removal.
The
probe
may
be
cut to
a minimum
of
16 inches
in length overall
(metal
end to metal
end)
and
mounted
in any
direction.
lnternal
spacers
are located
approximately
every
foot that
supports
the inner
rod.
The inner rod
should
not
go
unsupported
for
more
than 2
inches.
tf this
is the case
after
you
cut the
probe,
remove
a spacer
from
the
scrap seclion
and install
it into
the end
of
the
probe
over
the
inner
rod
and crimp
the rod
to
prevent
it from
moving.
See
the
drawing in
ILLUSTRATIONS
section
for an example
probe
installation.
These are
intended
as examples
only.
As each
tank
configuration
may be different,
it is
your
responsibility
to
design and
implement a
proper
installation
method
for
your
aircraft:
The
example shows
a
cross
section
of
a typical
long
flat wing
tank.
Typically the
probe
enters
the tank
from
the inboard
fuel bulkhead
and angles upward
so
that
it is
'welled'
from
empty tank
to full
tank
proportionately.
INSURE
that
nothing
interferes
with
the
probe
such
as a
'flop
tube',
fuel
pick
ups,
vents
or drains,
etc.
The
probe
may
enter
a fuel
tank from
the
bottom
up,
or vice
versa,
as
long as the
probe
sees at
least
a 85o/o
coverage
change from
full
to empty.
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