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SECTION VI
CHEROKEE
140 "D"
BRAKE SERVICE
The
brake
system
is filled
with
MIL-H-5606
(petroleum
base)
hydraulic fluid.
This
should be
checked
at every
100 hour inspection
and
replenished
when
necessary
by filling
the
brake
reservoir
on the
firewall
to the
indicated level.
If the system as a
whole
has
to
be
refilled
with
fluid,
this should
be done by filling
with the
fluid
under
pressure
from
the
brake
end
of the system.
This
will
eliminate
air
from
the
system
as
it is being filled.
If
after
extended
service
the
brake
blocks
become
worn
excessively,
they
are
easily
replaced
with
new
segments.
Brake
clearances
require
no
adjustments.
LANDING
GEAR SERVICE
Main wheels are easily removed
by
taking off the
hub
cap, axle
nut,
and the two
bolts holding
the
brake
segment
in place,
after
which
the
wheel
slips
easily
from
the
axle.
Tires
are removed
from
the wheels
by first deflating
the tire,
removing
the three through
bolts,
and separating
the wheel
halves.
Landing
gear
oleo
struts
should
be
checked
for proper
strut
exposures
and
fluid leaks.
The required
extensions
for
the strut
when
under
normal
static
load
(empty
weight
of airplane
plus full fuel
and
oil)
is 3.25 inches
for the nose
gear
and
4.50
inches for
the
main
gear.
Should
the
strut
exposure
be below
that
required,
it
should
be
determined
whether
air or oil
is
required
by first
raising the airplane on
jacks.
Depress
the
valve
core
to allow
air to escape
from
the strut
housing
chamber.
Remove
the
filler plug
and slowly raise the strut to
full
compression.
If the strut
has
sufficient
fluid it
will
be
visible up to
the
bottom
of the
filler plug
hole
and
will
then
only require
proper
inflation.
Should
fluid be below
the
bottom
of the
filler plug hole,
oil should
be
added.
Replace
the
plug
with
valve core removed,
attach
a
clear
plastic
hose to the
valve
stem of the
filler plug
and
submerge
the other
end
in
a container
of
hydraulic fluid
(MIL-H-5606).
Fully
compress
and
extend
the strut several times thus
drawing fluid from
the container
and
expelling
air
from
the
strut
chamber.
To allow
fluid
to enter
the
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