Cessna T188C - Flexible Fluid Hoses; Leak Test; Replacement; Engine Baffles

MODEL
188 &
T188 SERIES
SERVICE MANUAL
NOTE
Throughout
the
aircraft
fuel system,
from
o. Make
sure
all switches
are in
the OFF
position
the tanks to the carburetor, use NS-40 and connect battery cables.
(RAS-4) (Snap-On-Tools Corp.,
Kenosha, p.
Inspect engine installation for
security, correct
Wisconsin),
MIL-T-5544
(Thread Cor-
routing of controls,
lines, hoses
and electrical
wir-
pound Antiseize, Graphite Petrolatum),
ing,
proper safetying and tightness
of all components.
USP
Petrolatum
or engine
oil as
a thread
q. Install
engine
cowling in
accordance
with para-
lubricator
or to
seal a leaking
connection,
graph
11-3.
Apply
sparingly
to male threads,
exercis-
r. Clean
and install
air filter.
Ing extreme
caution to
avoid "stringing"
s. Perform
an engine run-up
and make final
adjust-
sealer across the
end of the fitting. Always
ments
on engine controls.
ensure that a compound, the residue from a
previously
used
compound, or
any other
11-17. FLEXIBLE
FLUID
HOSES.
foreign material cannot enter the system.
11-18. LEAK TEST.
h. Connect lines and
hoses as follows:
a. After each 50 hours of
engine operation, all flex-
1. Oil temperature bulb below oil cooler. ible fluid hoses in the engine compartment should be
2. Oil pressure hose at firewall. checked for leaks as follows:
3. Primer line at firewall.
1. Examine the exterior
of hoses for evidence of
4. Fuel hose at fuel
strainer,
leakage
or wetness.
5. Manifold pressure
line at firewall.
2. Hoses found leaking
should be replaced.
6. Install
all clamps
attaching
lines
and hoses
3. Refer
to paragraph
11-14
for detailed
inspec-
to
engine, engine
mount or
brackets.
tion procedures
for
flexible hoses.
NOTE
11-19.
REPLACEMENT.
a. Hoses should not be twisted on installation.
If the aircraft is equipped with an engine- Pressure applied to a twisted hose may cause fail-
driven hydraulic dispersal system, con- ure or loosening of the nut.
nect hoses to pump, fill and pressurize b. Provide as large a bend radius as possible.
hydraulic
reservoir as outlined in Section
c. Hoses should
have a minimum of one-half
inch
19. clearance from other lines, ducts, hoses or sur-
rounding objects or be butterfly clamped to them.
i. Connect wires and cables as follows: d. Rubber hoses will take a permanent set during
1. Cylinder head temperature
probe at lower
extended use in service.
Straightening a hose with a
side of cylinder. bend having a permanent set will result in hose
2. Electrical wires and wire shielding ground at cracking. Care should be taken during removal so
alternator.
that hose
is not bent excessively, and during
reinstal-
3. Tachometer drive shaft at adapter on engine. lation to assure hose is returned to its original posi-
Tighten drive shaft attaching nut to 100 lb-in. tion.
e. Refer
to AC 43.13-1,
Chapter 10,
for additional
CAUTION
installation
procedures
for
flexible fluid
hose assem-
blies.
When
connecting
starter
cable,
do
not permit
starter terminal bolt to rotate. Rotation of 11-20. ENGINE BAFFLES. The sheet metal baffles
the bolt could break the conductor between installed on the engine directs the flow of air around
bolt and field coils causing
the starter to be the
cylinders and other engine components
to provide
inoperative. optimum cooling. These baffles incorporate rubber-
asbestos composition seals at points of contact with
4. Starter electrical cable at starter. the engine cowling and other engine components to
5. Install all clamps attaching wires and cables help confine and direct the airflow to the desired area.
to engine, engine mount or brackets. It is very important to engine cooling that the baffles
j. Install exhaust stacks, muffler and shrouds in and seals are in good condition and installed correct-
accordance with paragraph 11-79. ly. The vertical seals must fold forward and the side
k. Install hot and cold
air flexible hoses.
seals must fold upwards.
Removal and installation
1. Install propeller
and spinner in accordance
with of the various baffle
segments is possible with
the
instructions
outlined in Section 13.
cowling removed.
Be sure that any new baffle
seals
m. Make a magneto switch ground-out and continuity properly.
check
and connect
magneto
switch wires.
11-21. CLEANING AND INSPECTION. The engine
WARNING-
baffles
should be cleaned with
a suitable solvent to
remove oil and dirt.
Be sure
magneto
switch is
in OFF position
when connecting switch wires to magnetos. NOTE
n.
Service engine
with
proper grade
and quantity
of
The
rubber-asbestos
seals are
oil and grease
engine oil. Refer to Section
2 if engine is new, newly
resistant but should not
be soaked in solvent
overhauled or has been in storage, for long periods.
11-9