Cessna 188 Series Service Manual page 33

MODEL 188 & T188 SERIES SERVICE MANUAL
A recommended procedure for cleaning an engine and 2-34. PROPELLER. Wash hub and blades with a
accessories is as follows. soft cloth and Stoddard cleaning solvent or equivalent.
CAUTION-
then dry thoroughly with compressed air. Wipe pro-
peller occasionally with an oily cloth, then wipe with
a dry cloth. In salt water areas this will assist in
Do not attempt to wash an engine which is still corrosion proofing th propeller. Check blades and
hot or running. Allow the engine to cool before
hub periodically for oxidation and corrosion.
cleaning.
When cleaning propellers, take the following pre-
a. Remove engine cowling.
cautions:
b. Use fresh water for wash-down when the engine
is contaminated with salt or corrosive chemicals.
a. Be sure ignition switch is off.
A cleaning agent such as described previously may b. Make sure engine has cooled completely. When
then be used to remove oil and grease. moving propeller, DO NOT STAND IN LINE OF
BLADE.
CAUTION
c. Avoid using excessive amount of liquid cleaner
as it may splatter or run down the blade and enter the
Care should be exercised to not direct cleaning propeller hub or engine.
agents or water streams at openings on the d. After cleaning, check the area around the propeL-
starter, magnetos, alternator, "vacuum" pump ler hub to be sure all cleaning solution is removed.
or turbocharger relief valve.
2-37,
c. Thoroughly rinse with clean, warm water to See Section 13 for information on oil filled hubs.
remove all traces of cleaning agents.
2-35. WHEELS. The landing gear wheels should be
CAUTION
washed periodically and examined for corrosion,
chipped paint, and cracks or dents in the wheel cast-
Cleaning agents should never be left on
ings. Sand smooth, prime and repaint minor defects.
engine components for an extended period
of time.
Failure to remove them may
cause damage to components such as 2-36. LUBRICATION.
Neoprene seals and silicone fire sleeves
and could cause additional corrosion.
2-37. REQUIREMENTS. Lubrication requirements
are specified in the lubrication chart in figure 2-5.
d. Completely dry the engine and accessories using
d. Completely dry the engine and accessories using Before adding grease to fittings,wipe off all dirt.
clean, dry compressed air.
Lubricate until new grease appears around parts be-
e.
If desired, the engine cowling may be washed
ing lubricated, when wipe off excess grease.
Lubri-
with the same cleaning agents, then rinsed thorough-
cate tailwheel every 25 hours. When operating in
ly and wiped dry. dusty conditions, mud or water, more frequent lubri-
f. Reinstall engine cowling.
cation is recommended.
WARNING
WARNING
2-38. ROD END BEARINGS. Periodic inspection
For maximum safety, check that the magneto and lubrication is required to prevent corrosion of
switches are OFF, the throttle is closed, the the bearing in the rod end. At each 100 hour inspec-
mixture control is in the idle cut-off position, tion, disconnect the control rods pt the aileron and
and the airplane is secured before rotating the flap and inspect each rod end for corrosion. If no
propeller by hand. Do not stand within the arc
corrosion is found, wipe the surface of the rod end
of the propeller blades while turning the pro-
balls with a general purpose oil and rotate the ball
peller.
freely to distribute the oil over its entire surface
and connect the control rods to their respective units.
g.
Before starting the engine, rotate the propeller
If corrosion is detected during the inspection, install
by hand no less than four complete revolutions. new rod ends.
Revision 1 2-11