Cessna 1969-1976 172 Series Service Manual page 75

5-5. REMOVAL.
(FLAT.) (See sheet 1 of figure
5-1.) The following procedural steps remove the
landing g e a r
as a
complete assembly. Refer to
applicable paragraphs for removal of the individual
components.
a.
Remove floorboard a c c e s s covers over spring-
s t r u t being removed,
b. Hoist
or jack a i r c r a f t i n accordance with Sec-
tion 2,
c. Remove s c r e w s and slide external fairing plate
and seal down around spring strut.
d. Drain hydraulic brake fluid from brake line on
spring-strut being removed.
e. Disconnect hydraulic brake line a t bulkhead
fitting inboard end of spring-strut s o that brake line
is removed with the spring-strut.
Cap or plug dis-
connected fitting to prevent entry of foreign material.
f. Remove nuts and w a s h e r s f r o m U-bolt a t out-
board attaching structure and remove U-bolt.
g. Remove bolt attaching the inboard end of the
spring-strut and pull entire g e a r out of fuselage.
Note s h i m s placed under inboard end of the spring-
s t r u t and m a r k o r tape shims together to be s u r e
they are installed correctly a t installation of the
spring-strut.
5-6. INSTALLATION. (FLAT.) (See sheet 1 of
figure 5-1.) The following procedural steps install
the landing gear
as a
complete assembly. Refer to
applicable paragraphs for installation of the individ-
ual components.
a. Slide external fairing plate and seal over upper
end of landing gear spring-strut.
b. Slide the spring-strut into place and work shims
into position under inboard end of spring-strut. In-
stall bolt, washer, and nut to secure inboard end of
spring- strut.
NOTE
Shims
are
installed under inboard end of the
spring-strut
as
required to level the wings
within
a
total tolerance of three inches. Maxi-
mum number of shims permissible is two.
c
Install U-bolt a t outboard attaching structure
with w a s h e r s and nuts. Tighten nuts evenly to 270-
300 lb-in. Also torque inboard attach bolt to speci-
fied torque of 1100-1300 lb-in
d. Attach seal and external fairing with screws.
e. Lower a i r c r a f t and remove jacks or hoist.
f. Connect brake line; fill and bleed brake system
g. Install floorboard a c c e s s covers.
as
outlined in paragraph 5-54.
5-7. REMOVAL (TUBULAR). (See sheet 2 of fig-
u r e 5 -1. ) The following procedural steps remove the
landing g e a r
as a complete assembly. Refer t o ap-
plicable paragraphs for removal of the individual
components,
a.
Remove floorboard a c c e s s covers over spring-
s t r u t being removed.
b. Hoist or jack a i r c r a f t in accordance with Section
2.
c. Remove s c r e w s attaching fairing to fuselage and
remove screw
at
splice in fairing and remove fairing,
d. Drain hydraulic brake fluid from brake line on
spring-strut being removed.
e. Disconnect hydraulic brake line i n fuselage s o
that brake line is removed with the spring-strut.
Cap o r plug disconnected fittings to prevent entry of
foreign material.
f.
Remove nut, washer, and bolt attaching inboard
end of spring-strut to the inboard landing gear bulk-
head fitting.
g. Pull landing gear from fitting and bushing. Use
care when removing landing gear to prevent damage
to the hydraulic brake line. The landing g e a r is a
compression fit i n the bushing in the outboard landing
g e a r bulkhead.
5-8. INSTALLATION. (TUBULAR.) (See sheet 2
of figure 5-1.) The following procedural steps in-
stall the landing g e a r as a complete assembly. R e -
fer to applicable paragraphs for installing the indiv-
ual components.
a. Re-install all p a r t s removed from spring-strut.
b. Apply Dow Corning Compound DC7 to approxi-
c. Work spring-strut into place through bushing in
mately 11 inches on upper end of spring-strut,
outboard spring-strut fitting and into spring-strut
inboard fitting
.
d. Align spring-strut i n inboard fitting and install
bolt through fitting and spring-strut. Install washer
and nut on bolt and tighten to torque value of 1100-
1300 Ib-in.
bleed brake system in accordance with paragraph
5-54.
f. Install fairing.
g.
e. Connect hydraulic brake line to fitting. Fill and
Lower a i r c r a f t and install floorboard a c c e s s
covers.
5-9, S T E P BRACKET INSTALLATION.
NOTE
The s t e p bracket is secured to the landing
gear spring-strut with EA9309, o r
a
s i m i l a r
epoxy base adhesive.
a.
Remove landing gear strut fairing, if installed.
b. Mark position of the step bracket
s o
that the new
s t e p bracket will be installed in approximately the
s a m e position on the strut.
Change 3 5-3