Mooney M20B - Page 43

3.
Apply
force
on
torque
~-rench
and
read
torque
at
instant
that
point
R
first
begins
to
move.
Movement of
retraction
truss
(5062)
may
be felt
at
Doint Pc
map
be
seen
in
area
of
joint
S. Practice
this
several
times before
recording
torque.
Torque
should he
between
140
and
200 inch
pounds.
NOTE: Take
reading
on
torque
wrellch
when
.005
to
.010
inch
movement
is
observed
at
points
R
and
X
(figure
13A).
4.
After release
of
force,
retraction
truss
(5062)
should
snap
back
to
f~!!
over-
center
and
should
bear
tightly
against
retraction link
(5032)
at
point
S..
This
should be
carefully
checked
by
pulling
down
on
retraction
truss
(5062).
If
re-
tradion truss
(5062)
moves
down,
the~ the
przlooad
in
tubes
(5085)(2)
is
not
suf5icient.
b. Main
Gear
(See figure 13A).
I.
Place
rigging
tool
(8444)
as
shown in
fi,nure
13A
Hold
in
place
with
thumb
at
pointY
pressing
forward.
2. Place
finger
at
point
X.
3.
Apply
force
on
torque
wrench
and
read
torque
at,
instant
that
point
X
first
be~gins
to
move.
Movement
of
retracting
truss
(5256)
may
be
felt
at
point´•X
and
may
be
seen
in
area
of
joint
Z. Practice this
several times before record-
ing
torque.
Torque
should
be
between
275 and
325
inch
pounds.’The
torque
should
register approximately
the
same
at
both
main
gears.
4. After release of
force,
retracting
truss
(5256)
should
snap~back
to
full
over-
center
and
should
bear
tightly against
retracting
link
(5026)
ad
point
Z. This
should be
carefully
checked
by
pulling
do~irn
on
retractii~g
truss
(5256).
If
re-
trading
truss
(5256)
moves
down,
then
the
pre-load
in
tubes
(5242)(2)
is
not
sufiicient.
CAUTION:
Do
not
attempt
to
rig
the
gear
to
increase
or
decrease
gear
up
travel.
3.
Adjustment
of
Pre-Load.
If
th~
torque
values
do
not
fall
within the
limits
specified,
then
the
system
pre-load
should
be
changed
by changing
the
lengths
of
retraction
tubes
(5242)
and
(5085).
This
is
done
by
taking
a
turn
on
the
heim
bearings
in
the
proper
direction.
One-half
turn
is
usually
sufli;
cient.
Any
adjustment
made
to
the
nosegear
should be made
identically
to
boWI
retraction
tubes
(5085)
since
they
should
carry
thesame
pre-load.
Since
the
retraction
tubes
from all
gears
are
attached
to
the
gear
retraction
lever,
a
change
in
pre-load
in
the
retraction
tube
at
one
gear
can
affect the
pre-load
in
the
retrac-
tion
tubes
at
the
remaining
gears.
Therefore,
after
an
adjustment
is
made
at
one
gear,
the
.other
gears
must
be
rechehe~d.
This
process
must
continue
until
the
proper
pre-loads
are
obtained
in
the
retraction tubes
at
ail
gears.
The
amount
of
freedom
of the
gears
las
determined
from the
check made under
item
4
of
rigging
instructions
above)
win affect the
torque
readings.
Gear
systems
with
free
joints
will be
adequately
rigged
when
the
torque
is
on
the
low
end
of
We
range
while
gears
that
are
stiffer
may
require
torque
values
on
the
high
end
of
the
ran~e
for
adequate pre-load.
A
final
check
should
be
made
of the force
required
to
place tha,rrear
handle
(5039)
in
the
gear
down
lock
(gear
extended
position).
If
the
required
to
move
the
gear
handle
forward the
last
1
to
2
inches
is
excessive,
then the
system
pre-load
mav
be
reduced
slight-
.ly
within
the
prescribed
torque
limits.
Check´•for and relieve
any
bind;n
the
sliding
hand
grip
at
the
top
of
the
gear
lever
since
a
bind
at
this
point
may
make
it
difficult
to
lock the
gear
handle
in
place.
NOTE:
Gear
rigging
tools
(8442)
and
(8444)
may
be obtained
at
a
nominal
cost
through
our
dealer
organization
or
directly
from
Mocney
Aircraft,
Inc.
-33-
r
j
OLDWILLWAYNE