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REMOVING AND
INSTALLING
THE ENGINE
b.
Remove
the
wing
mounting
bolt
access
plates
from the
top and
bottom of
the wing.
a.
Remove
the upper cowl.
c.
Place
the airplane
on a
three
point
jack
and raise
b.
Disconnect the
air
filter and cowl flap actuator.
until
the
wheels
are
clear.
See Section
2
for jacking
c.
Remove
the propeller.
instructions.
d.
Remove the lower
cowl and
fillets.
d.
Place
a
suitable
cradle
under
the
wing
being
e.
Disconnect
all plumbing
and
exhaust
stacks at the
removed
and a wing stand under the opposite
wing.
A tail
firewall.
stand will also
be
required
to assure
stability.
f.
Disconnect
engine
controls.
e.
Open
the
brake cylinder bleed
ports
and
pump all
g.
Disconnect
electrical
wiring
at
firewall,
and at
fluid from
the system.
accessories
where
necessary.
-
f.
Retract
the
landing gear
until
the inboard landing
h.
Place
a wing stand under
the
opposite
wing
and
a
gear
doors are fully open.
stand under
the tail.
g.
Disconnect the inboard door
actuating
rod
from
i.
Position the engine hoist and attach the hoisting
the
control
horn.
hook to the
engine
lifting
ring.
Remove
the slack
from the
h.
Disconnect
the
landing
gear uplock
cable at the
cable.
inboard door idler arm in
the cabin.
j.
Remove the bolts
securing
the
engine
mount to
i.
Disconnect
the
landing
gear actuator
rod
from
the
the nacelle
firewall.
V-brace
in
the wheel well.
k.
Remove
the engine.
j.
Disconnect the
aileron
cables
at the
turnbuckles
1.
Reverse
preceding
steps
for installation,
in
the wheel
well
and remove
roll pins
from inboard
aileron
cable
pulley
brackets. Disconnect aileron tab cables
and
aileron
tab
stops
in left
wheel well
(if installed).
CAUTION
k.
Disconnect the hydraulic brake line at
the
inboard
connection
in the
wheel well.
To be
safe, treat all
S
series magnetos
as hot
1.
Disconnect fuel lines between
wing root rib and
whenever
the ground
lead is disconnected. To
the
fuselage.
ground the
magneto,
connect
a
wire
to the
m.
Disconnect the flap drive shaft
at
the
motor and
switch lead
at the
filter capacitor and
ground
remove the
clamps
attaching
the shaft
to the fuselage.
the
wire
to the engine
case. If
grounding
is
n.
Remove the lower
aft nacelle
fairing
assembly.
impractical,
remove
the
cable outlet plate
on
o.
Remove the leading
edge
cover
of the
wing
the
rear of the magnetos
or disconnect
all
the
located between the fuselage
and nacelle.
spark
plug
leads.
p.
Remove the
clamps
securing
the
wiring
bundles
to the
wing
inboard leading edge.
Disconnect
wiring
bundles at terminals located on aft side of
nacelle
firewall.
When
reinstalling
the engine, torque
the engine
mount
q.
Disconnect
wiring
to the electrical components
bracket bolts 305
to
325 inch-pounds
on the
bolt head.
located in each side of the
upper
nacelle.
Torque
on the nut should
be 265
to
290 inch-pounds prior
to
r.
Disconnect the plumbing between
the wing root
Serial TD-534 except TD-506,
and
245
to
265 inch-pounds
rib and
the fuselage.
on Serials TD-506, TD-534
and after.
Add
no
more than
s.
Disconnect flap
wire
bundle and
safety
switch
three 105090-0324K
washers
between the lower engine
wiring
in left
wheel
well.
Disconnect
plumbing
and
mounts
and firewall
as spacers
for alignment of the
electrical
wiring
(booster
pump
and fuel
quantity
propeller
assembly
and the engine
cowl opening.
transmitter)
in each
wheel well.
t.
Remove the clamps
securing
engine
controls
to
If the
engine
is disconnected at the engine shock
mounts,
leading edge.
rather
than at the
firewall, on
reinstallation
torque
these
u.
Disconnect
the
pitot line between the
wing root
engine
mount
bolts
475
plus or minus 25 inch-pounds. Be
rib
and the fuselage (left
wing
only).
careful
to align the
holes in the rubber mount bushings
with
v.
Outline the
position
of the
wing
on the fuselage
the
pin
which
protrudes
equidistant on both sides of
the
as
a guide to
reinstallation.
steel
bushing.
Because the cowling is an integral part of the cooling
CAUTION
system,
the
engine
will
overheat
if operated with the
cowling
removed
for more than short test periods.
There
should
be no bolt binding
during
removal.
Should binding
occur,
adjust the
wing
position
until the bolt disengages freely.
WING
REMOVING
THE WING
w.
Remove the
wing attach
bolts from the fittings.
x.
Remove the
wing
by
pulling
it
straight away
from
a.
Drain both fuel cells.
the
fuselage.
4-2
C4
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Troubleshooting
