Mooney M20R - Main Gear Installation; Main Gear Door Rigging

SERVICE
AND
MAINTENANCE
MANUAL
M20R
MOONEY
AIRCRAFT
CORPORATION
11.
identify
all
components
removed,
and
DOi
NOT
rigging
procedures
should
be
used
when
reinstalling
inter-mix
right
and
left
gear
components,
them:
12.
DO NOT
attempt
to
repair
any
heat
treated
com-
A.
Disconnect
outboard
doors
at
forward
and aft
ponent
of
main
landing
gear
assembly.
linkages
(B)
(Fig.32-2).
B.
Disconnect
inboard
doors
at
forward
linkage
32-10-02
MAIN
GEAR
INSTALLATION
1.
Lubricate
wheel
bearings,
retraction
linItage
and
and
springs
(A)
(Fig.32-3).
C.
Raise
gear
electrically
to
full
UP
position.
fore
and
aft
trunnion
bearings priorto
installation
(ntferto
D.
FoMrard
leading edge
and
aft
trailing
edge
of
Section
5-20-07
for
recommended
lubricants).
mid
gear
door
should
be
tight
against
wing
skin.
Spac-
2.
Installation
of
main
gear
is
exact
reversal
of/
main
ers
(A)
(Figure
32-2)
should
be
added
or
removed as re-
gear
removal
procedure.
quired
to
obtain
a
good
fit
with
no
binding
or
distortion
NOTE
with
gear
in
UP
position.
AN960-10
or
AN960-416
Torque
510078-001,
-003
or
-005 bolt
to
270
tci
300
washers
may
be used
as
spacers.
in. Ibs.
3. Reconnect
outboard
and
mid-gear
doors
and
check that
doors
are
faired
with
wing
skin/wheel
well
3.
Check
fore and
aft
movement
of
gear
in
b~aring
opening
and
that there
is
no
binding
ordigtortion
where
blocks.
Maximum
allowable
movement
is
.020. Shl’m
ex-
links
attach
to
door.
Adjust
linkage/space‘rs
if
required.
cess
by
inserting
shims
at
rear
block.
(Figure
32-2)
Extend
gear
to
adjust,
then
retract
to
4.
Temporarily
attach
gear
door
link
rods
to
ge~r
leg
check
adjustment.
brackets.
4.
Check
main
gear
overcenter
preload
torque
for
5. Retract
gear
while
checking
for
binding
in
doo/r
link-
proper
values.
Re-rig
entire
landing
gear
system,
if
nec-
age
and
proper
contact
of
gea
r
door
edges
with
winjl.
DO
essary.
NOT
make final
gear
door
adjustments
until
gedr
has
been
rigged
(Ref.
32-30-02).
32-10-04
INBOARD
DOOR
RIGGING
32-10-03
MAIN
GEAR
DOOR
RIGGING
1.
Adjust
inboard
door
link
to
close
doors
with
"O"
gap.
Doors
must
be
closed
with
gear
extended
and
re-
i.
Raise
aircraft
on
jacks.
See
Section
7-10-00.
tracted.
If
door is
not
closed
in
both
positions,
refer
to
I
landing
gear
rigging
procedures
in Section
32-30-02.
Any
adjustment
to
rod
end
on
main
retract
tube
(L) (Fig.
32-7)
and
rod
end
on
retract
tube
(V) (Fig.
32-11)
is
at
a
C~
2
to
1
ratio,
respectively;
this
adjustment
will
change
rig-
t:
ging
values.
Re-check
preload
values.
EXAMPLE:
If inboard
gear
door
is
open
a
small
amount
when
landing
gear
is
down,
but
closed
when
gear
is
UP.
Adjust
by turning
retract
tube
(V)
rod
end IN
1/2
turn,
and retract
tube
(L)
(Fig.
32-7)
rod
end
OUT 1
turn.
EXAMPLE:
If
inboard
gear
door is
closed with
landing
gear
in
DOWN
position,
but
open
a
small
amount
with
ii
tube
(V)
(Fig.32-11)
rod
end
OUT
1/2
turn,
and
retract
landing
gear
in
UP
position.
Adjust by
turning
retract
tube
(L)
(Fig.32-7)
rod end
IN
1
tum.
2.
Tighten
jamb
nuts
and reconnect
springs
on
in-
I
board
gear
door
bellcrank
(A) (Fig.32-3).
NOTE
I
Do
not
rig
doors
shut
more
than
necessary
as
I
i
this
may
result in
higher
actuator
loads
than
I.
necessary.
II
3.
Adjust
outboard
door
link
to
close
all
gap
at
lead-
II
i.
ingedgeofdoor.
If door is
rigged
too
tig
ht,
skin
will be
under
stress
(concave)
at
the
point
where
the
linkage
is
attached
to
door.
It
could also
cause
mid
and
inboard
i
i
doors
to
gap
open.
4.
Cycle
gear
manually
and
electrically
while
inspect-
ing
forclearances.
Re-check
landing
gear
system
rig-
MID-GEAR
DOOR
ADJUSTMENT
POINTS
ging
values.
FIGURE
32-2
5.
Remove
aircraft
from
jacks.
NOTE
Gear
system
must
be
properly
rigged
prior
to
gear
door
rigging,
see
Section 32-30-01
and
32-3C)-02.
2.
Normally
once
doors
are
installed
at
factory 6o
fur-
ther
adjustment
should
be
required.
However,
should
mid-gear
doors be
removed for
any
reason
the
foll’owing
32-1 0-02
REV. 10-98
Island Enterprises