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Rockwell Commander 112 - GENERAL MAINTENANCE PRACTICES

Rockwell Commander 112
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SECTION
ITI
HYDRAULICS
MAINTENANCE
MANUAL
ROCKWELL
COMMANDER
112/B/TC/TCA
1.
SHIMMY
DAMPENER
20
BRAKE CYLINDERS
3.
EMERGENCY EXTENSION VALVE
4.
HYDRAULIC
POWER
PACK AND MANIFOLD
5.
LANDING
GEAR
ACTUATING
CYLINDERS,
NOSE AND MAIN
6.
WHEEL
BRAKES
7.
BRAKE HYDRAULIC RESERVOIR
MODEL
112B/TCA
8.
HYDRAULIC PRESSURE SWITCHES
MODEL
112
381andSubsq.).
MODEL
112B/TC/TCA
X235A6
Figure
3-1.
Hydraulic
Equipment
Locator
GENERAL
MAINTENANCE
PRACTICES
Cleanliness
is
an
essential
part
of
hydraulic
system
and
component
maintenance
and
repair.
Small
particles
of
dirt
or
other
foreign
materials
are
especially
dam-
aging
to
seals
and
surfaces
of
hydraulic
component
moving
parts;
therefore,
every
precaution
must
be
employed
to
prevent
contamination
of
hydraulic
fluid.
The
hydraulic
system
must
be
serviced
at
prescribed
intervals
and
storage
containers
should
be
kept
clean
and
sealed.
The
following
information
is
generally
applicable
for
all
hydraulic
system
maintenance.
a.
Cap
or
plug
all
openings
in
hydraulic
lines
and
component
parts
at
time
of
disconnection,
to
prevent
foreign
materials
from
entering
hydraulic
system.
b.
Use
correct
safety
wiring
technique
during
re-
assembly
and
installation
of
components.
c.
Clean
hydraulic
system
component
parts
and
connections
in
cleaning
fluid,
Federal
SpeCification
P.
D. 680,
and
dry
with
moisture
free
air.
d.
Inspect
component
parts
for
cracks,
nicks,
burrs,
scratches,
scoring,
and
condition
of
threads
on
com-
ponent
parts
and
fittings.
e.
Clean
hydraulic
actuator
cylinders,
pistons,
or
honed
internal
surfaces,
using
light
buffing
compound
3-2
or
crocus
cloth;
rub
in
lengthwise
direction
when
re-
mOving
scratches
or
nicks.
f.
Replace
all
O-rings,
seals,
and
scrapers
at
time
of
overhaul
and
installation
of
hydraulic
components.
g.
Lubricate
component
parts
and
seals
with
clean
hydraulic
fluid,
MIL-H-5606,
prior
to
re-
assembly.
h.
When
installing
O-rings,
make
certain
the
O-ring
is
evenly
stretched
around
circumference
of
part
and
not
twisted
in
retaining
groove.
i.
Never
use
force
to
assemble
component
parts.
j.
When
pOSSible,
pressure
check
hydraulic
com-
ponents
for
leakage
prior
to
installation
on
aircraft.
k.
Lubricate
pipe
thread
fittings
with
anti-seize
compound
conforming
to
Federal
Specification
TT-A-
580.
1.
Lubricate
B-nuts
with
thread
lubricant
conform-
ing
to
SpeCification
JAN-A-669.
m.
Release
pressure
from
hydrauliC
lines
prior
to
tightening
a
tube
fitting.
n.
When
replaCing
fittings
or
lines,
always
start
tube
nuts
with
fingers,
and
complete
tightening
with
a
wrench.
o.
Always
bleed
hydraulic
lines
when
replaCing
hydraulic
components.
p.
Always
perform
an
operational
check
after
re-
placing
hydrauliC
system
components.
Copyright Commander Owners Group 2013 All Rights Reserved
**unofficial copy**

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