Cessna 402B 1973 - Page 34

during
high
angles
of descent. Each
pump
is electrically
protected
by
the
respeetive landing
light
circuit
breaker.
When
the
right-hand
landing
light
is
not
installed,
a
circuit breaker
is installed
to
protect
the
right-
hand
transfer
pump.
During
preflight
inspection
these
pumps
can
be
checked
for
operation
by
listening
for a
pulsing
sound emanating
from
the
aft
tip tank fairings
with
the
battery
switch
in
the
ON
position.
FUEL
SETECTOR VATVE HANDLES
The fuel
selector valve
placards
are
marked
LEFT
ENGINE
OFF,
LEFT
I\4AIN
and
RIGHT
I\4AIN
for
the
left
engine
selector and
RIGHT
ENGINE
OF4
RIGHT
I\{AIN and
LEFT
MAIN
for
the
right engine
selec-
tor. The crossfeed
position
of each
selector
valve is
the one marked
for
the
opposite main
tank.
The fuel
selector
valve haldles form the
pointers
for t}te selectors.
The
ends
of the handles
are
arrow-shaped
and
point
to
ttre
position
on
the
selector
placard
which
comesponds
to
the
valve
position.
NOTE
O The fuel
selector
valve handles
should
be
turned
to
LEFT
MAIN
for the
left engine
and
RIGHT
MAIN
for the
right
engine,
during
takeoff, landing
and
all
normal
operations.
FUEL
FLOW
GAGE
s
1
When fuel
selector
valve handles
are
changed from
one
position
to another,
(feel
for detent)
the arxiliary
fuel
pumps
should
be
turned to
LOW and
the
mixture
controls should
be
in
the
FULL
RICH
position.
AUXILIARY
FUEL
PU IIAP
SWITCHES
The LOW
position
runs the
pumps
at
low
speed, providing
5.5
PSI
pressure
for
the
purging.
The
ON
position
also
runs
the
pumps
at low
speed,
as
long
as
the
engine-driven pumps
are
functioning.
With
the
switch
positioned
to ON
however
if an engine-driven
prmp
should fail,
the
auxiliary
pump
on
that
side
will switch to
high speed
automatically,
providing
suf-
ficient
fuel for
all engine operations
in-
cluding
emergency
takeoff.
Figure
2-3
2-17