Piper PA-24 Comanche Service Manual page 433

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PIPER COMANCHE SERVICE MANUAL
TABLE VIla-II. TROUBLESHOOTING OlART
(ENGINE) (cont)
Troublc
Call.
Rcaacdy
Low oil pressure.
lnsu.fficicftt oil.
Fill tank with oil of reeem-
mcnded viscosiry.
Leak in suction linc or
Check gasket between aeees-
pressure linc.
lOry
bousiftJ and crank-
cue.
Dirty oil strainers.
Remove &ftd dean oil
mainers.
Air lock or dirt in relief
Remove and clean oil pressure
valve.
relicf valve.
Hilh oil temperature.
See "High Oil Temperature"
in ''Trouble'' column.
Relief valve out of
Check valve.
adjusanent.
Defective pressure Pie.
Replace g• .
StopPlle in sc::avCDJC
Check linc for obstruction.
pump intake passage.
Clean suction strainer.
F
a1liDJ
or failed bcarinp. Chcck sump for metal
particles.
High oil tempcn.ture .
Insufficient oil coolin,.
Check air inlet and outlet for
deformation or obstrUction.
Insufficient oil supply.
Fill extcml1 tank to proper
levcl with specified oil.
Low gradc of oil.
Replace with oil conforming
to specification.
Cloged oillincs or
Remove and dean oil
mainers.
Strainers.
Excnsive blow-by.
Usually caused
by
wom or
scickinl riftp.
F
a.ilint
or failed bearinp.
Examine sump for metal
particles. If found. over-
haul oi engine
is Indicated.
Defectivc temperature
Replace gage.
gage.
POWER PLANT
ISSUED: 8/18/72
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