Piper PA-24 Comanche Service Manual page 429

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PtpER COMANCHE SERViCE MANUAL
b. In cnpnes that have been operatins on stniIht rninera.l oil for more thm 100 hOlln.
a
chaap to
detergent oil shollid be made with
a dqree of calltion. the
deaniDJ
action of
a
dctftlCt oil will tend to
loosen silldge deposits aad cause plll.ed oil pusqa. In fact. if an enpe hu been opcru:inc on stniIht
minerai oil. and is known to be in cxCCSlivcly difty cOllditioD, the switch to clctCfJCt oil sboll1d De defcrrccl
until after the enpne
is
overhauled.
c. When chanlilll from saaiPt mineft1 oil to deterpnt oil. the foUowinl precautionary steps should
be
taken:
1.
Do not add deu:rpnt oil to stnipt mineral oil. Dnin the sttailht mineni oil from the enpne
and fill with detClJCnt oil.
l. . Do not opente the eJ:llinc lonprthu
(1ft
hows before the
(U'St
oil cha• •
3. Check
a.Il
oil
sc:reeDS
for evidencc of sludp or plullinl. Chanp oil every ten hours if sludle
conditions ate evident. Resume
DOnna!
oil drUl periods
&ftet
sludte conditions improve.
CAUTION
The terms "dcterpnt". "additivc" aDd "compounded" used herein are
intended to refer to
a
clus of aviation
cpe
lubric:atiq oils to which
certain substanca have been added to improve than for aircraft use,
These terms do IlOt refer to such mataia.ls commonly known as "top
cylinder lubricant", "dopa", "carbon remover" which
1ft
sometimes
added to fuel or oil. Tbc::sc products
may
cause
d.tmaIe
to the
meine
and their presence in
Ul
eftline
will
void the owner'swun.nty. Under no
circ:umsunces should automotive oil be IlICd. Tbe use of
:automotive
lubric&ftts in Lyc:omiq ensines is sufficient grounds for rejection of
any
wananty daims.
POWER PLANT
ISSUED: 8/18112
2 Gl