Nose Landing Gear Alignment; Rudder Pedals At Neutral Angle - Piper PA-24 Comanche Service Manual

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PIPER
COMA~CHE
SERVICE
!\1A~l'AL
2170
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fl· (fl. Alignment Of
~ose
Landing Gear.
a. With no load on the nose \\ heel. make sure no gaps exist at the points where the steering arm
bushings contact the steering "bellcrank but will allow the bushings to rotate
with
a slight drag,
l
n-tuil
hushing- I.fl25 diu .. P :\ 1497(,-23: .61n dia .. P
~
14976-21: .lH2 dia .. P
~
14976-102: .750 dia .. P "
1.t9-fl-I~:
1.00
dia ..
P '\ 14175·1)3) to obtain proper adjustment.
b.
Two
methods of aligning the nose landing gear are as follows:
I. Chalk l.ine Method:
(a I Place the airplane on a hard level surface and place on jacks. (Refer to Jacking. Section
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FIG1'RE 6-4.
C:lA\1PI~G
Rl"DDER PEDALS
p,
~ErTRAI. POSITIO~
FIGl'RE
6-5.
Rl'DDER
PEDALS :\T
SEl'TRAl A!'iGI.E
II.
I
(bl Install the plumb bob attachment tool on the forward edge of the
lower
fire
wall
flange,
or on the
two
nose gear brace tubes as shown in Figure 6-6 and attach a plumb bob to the tool. (Thi- LOl,1
may be fabricated from dimensions given in Figure ft-31L)
(cl Attach a plumb bob to the fuselage one-half inch to the right from center of the tail <kid.
rd) L'sing the plumb bobs as a guide. snap a chalk line extending several feet
beyond
each
hob.
(e) Stand in from of the nose landing gear and orient the tire with the chalk line, Sight along
the center rib of the tire. With the rudder pedals clamped in neutral position (refer to Figure fl-4). adju..t the
rod ends of each nose gear steering rod
to
position the cockpit rudder pedals fore and aft. The centered angle
of the rudder pedals is
I)
degrees aft of the vertical position (refer to Figure 6-5) with the airplane
h~\
el. Place
a bubble protractor against t he pedal steering tube to check this angle. Do not attempt to make the adjustment
by means of one rod end bearing. but divide t he adjustment between the bearings at each end of the steering.
rod. A three-eighths inch minimum thread engagement must be held. Check by inserting a
wire
in the check
hole of the rod.
If) Measure 10 degrees on each side of the chalk line. intersecting at the
pivot
point of the
\\ heel. and check nose landing gear for 10 degrees maximum right and left travel.
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IsSt"EO: 8/18/72
1113
lA!'lDI~G
GEAR AND BRAKE SYSTE'I