Piper Comanche PA-24 Service Manual page 559

Trouble
Low oil pressure.
High oil temp .... Nr •.
POWER PLANT
ISSUED: 8118172
PIPER COMANCHE SERVICE MANUAL
TABLE VlIB-U. TROUBLESHOOTING OIART
(ENGINE) (coat)
Cause
Remedy
Insufficient oil.
Fill tank with oil of rceon.-
mended viscosity.
Leak in ",ction lihe or Check per between ICcri-
pressure lin •.
sory housing and crank·
c:asc.
Dirty oil .trainers. Remove and clean oil
mainen.
Air lock or dirt in reli.f Remove and
dean
oil pressure
valve. relief valve.
Hish oil tempetaNre. Sec "High Oil TemperaNre'
in ''Trouble'' column.
R.lief valve OUt of
Check valve.
adjumncnt.
Def.ctive pressure
ps'.
Replac. gag •.
StOppage in scavenge
Ch.ck line for obstruction.
pump intake puaage.
Clea.a.
suction strainer.
F
aiIiJII
or failed bearings.
Ch.ck sump for m.tal
particles.
I nsufficicDt oil cooling.
Check air inlet and outl.t for
deformation or obstruction
Inruffici.nt oil supply.
Fill exrernal tank to proper
I.vel with sp.cifi.d oil.
Low grad. of oil.
Replace with ou coniomllng:
to specific:anon.
Cloned Dillin .. or
Remove and dean ou
stninm.
Strainers.
ExcessIve blow-by.
Usually caused by ,,'orn or
suckmg nngs.
F
ai1ing
or failed bearings.
Examine sump for metal
particles.
If
found. over·
h.aul of engine 15 lndlcatcd
Defective rcmpen.ture
R.plac. gag •.
gage.
2 85