Piper PA-24 Comanche Service Manual page 482

PIPER
COMANCHE SERVICE MANUAL
TABLE VlIC-U.TROUBLISHOOTING CHART
(COOL)
(ENGlNI·TVlUIOCJIA1tGID)
Troubie Caa8I
Remedy
Excessive oil con- Falled or
fa.i1q
Cbeclc sump for
mew
sumption.
beariJII·
particles
and. if
found.
overhaw
of
enpne is iIIciicated.
Wom or brokaa piston
Insu.l1 new
rinp.
riDp.
IncolfCcr iIIsulIation
lucall new
rinp.
of piston riDp.
Extemal oillcakace. Check cpe cucfully
for
lcakq
pskea.
"0" rinp or sand
holes.
Failure of rinp to sat.
Use miDcra1 base oil.
(New nil:rided
Climb to cruise &lti-
cylillderS.)
Nde at
full
power &Ad
operate
u
7'"" cruise
power
settint
IIntil oil
consumption stabilizes.
Low grade of oil.
Replace with oil .;on-
formiDt
to
specifi-
catioDS.
Failed or failinJ turbo- Replace or rebuild
chaqer
barinc
or
seaLs.
NrbochllJCl'.
Faulty oil preaure ReplKe valve.
reducint valve in
turboc:harJcr oil supply.
Inaccurate pressure
Cold
weather.
HiJh and low pres.llfe
radinp.
rcadiDp due to ex-
aemely cold weather
are not necessarily
a malfunction. Small
aAcll0ht oillina will
not rransfer pressure
feaclinp accurately un-
til enpe
is quite warm.
POWER PLANT
ISSUED: 8/18/72
2
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