Superior Vantage Engine O-360 SERIES Maintenance Manual page 39

to eliminate the effect of backlash in
the valve operating mechanism and
to keep piston rings seated on the
lower ring lands.
CAUTION
Care must be exercised in opening the
air valve since sufficient air pressure will
have to be built up in the cylinder to
cause it to rotate the crankshaft if the
piston is not at TDC.
Open the air valve completely.
Check the regulated pressure and
adjust, if necessary, to 80 PSI.
Observe the pressure indication on
the cylinder pressure gauge.
difference between this pressure and
that shown by the regulator pressure
gauge is the amount of leakage
through the cylinder.
An individual
reading of less than 55 PSI, or a
difference of more than 20 PSI from
the highest
reading, is cause to suspect the
cylinder of being defective. See
Cylinder section of this manual to
remove and replace cylinder.
Re-install the spark plug.
−
If cylinder pressure readings indicate
there may be a defective cylinder,
recheck the readings after operating the
engine for at least 3 minutes to allow for
sealing of the rings with oil.
−
If leakage is still occurring after a
recheck, it may be possible to correct a
low reading due to foreign material
between the valve face and seat. This is
accomplished by placing a fiber drift on
the rocker arm directly over the valve
stem and tapping the drift several times
with a hammer to dislodge any material.
−
If cylinder pressure readings still indicate
a defective cylinder, remove and inspect
the suspect
Engine Overhaul Manual, or replace the
cylinder, see section 72-30-01.
© March 2006 Superior Air Parts Inc.
Maintenance Manual
O-360 and IO-360 Series Engines
The
cylinder pressure
to lowest cylinder
cylinder IAW Vantage
•
Engine Mounts
Check engine mounting bolts and bushings
for security or excessive wear. Replace any
bushings that are excessively worn.
•
Engine Accessories
Engine mounted
starters, vacuum
alternators,
pressure sensing units should be checked
for secure attachment and tight connections.
•
Carburetor / Fuel Injection
Check fuel injection servo or carburetor for
dye stains. Stains indicate leakage. Check
all controls and linkages for security and
proper operation.
hardware for
replacement must be accomplished before
the aircraft resumes operation.
•
Fuel Injection Manifold, Nozzles and
Lines
Check fuel injector nozzles for tightness.
Torque to 60 in-lb. Check fuel lines for dye
stains at connections.
leakage. Check all attaching hardware for
security. Repair or replacement must be
accomplished before the aircraft resumes
operation.
•
Alternator
Remove drive belt and turn alternator rotor to
check condition of bearings for abnormal
noise or roughness. Repair or replacement
must be accomplished before the aircraft
resumes operation.
5
Scheduled Inspection and Maintenance
accessories such
pumps, fuel system,
pumps, temperature
Check all attaching
security. Repair
Stains indicate
05-20-00
as
and
or