Engine Cowling; Cleaning, Inspection And Repair Of Engine Cowling; Installation Of Engine Cowling - Piper Comanche PA-24 Service Manual

.,
PIPER COMANCHE SERVICE MANUAL
This relief va"e regulates
th~
engine oil pressure by allowing excessi\e oil to return to the sump. "hlle
the balance of the pressure oil is fed to the main oil gallery in the right half of the crankcase Residual oil is
returned
b~
gra\ity to the sump where. after passing through a screen. it is again circulated through the
eng me
7A-:'. Troubleshooting. Troubles peculiar to the power plant are listed in Table VilA-Ill in the back of
this section. along with their probable causes and suggested remedies. When trOUbleshooting engmes.
ground the magneto primary circuit before performing any checks on the ignition system
7 A-4 Engine Cowling.
7A-5. Remo.al Of Engine Cowling. (PA-24-250 and PA-24-260. Serial !\os 24-1 to 24-4782 incl. and
24-4784 to 24-480:' incl.)
a Ascenain that the master s" itch and mag
,~switches
are in the OFF position
b. Release the three cowl fasteners on each SIde of the engine compartment
c Remo\e allaching screws from the top co,,1 at the firewall and nose cowl
d Disconnect cowl allachment straps from top cowl.
e Remove the two allaching nuts. washers and screw securing the top cowl channel to firewall
f Lift the top cowl from the engine assembly
g Disconnect the air bellows from air filter by loosening the quarter turn fasteners
h Disconnect all drains and holes allached to the bOllom cowl
Disconnect the two support tubes from the ball am cowl
1
Disconnect the nose gear door retraction rod at the nose gear strut
k Remove allaching screws from bOllom cowl by pulling down and forward
7 A-6 Cleaning. Inspection And Repair
or
Engine Cowling.
a Ckan cowling with a suitable cleaning sohent and wipe dry with a ckan cloth
b Inspect cowling for dents. cracks. loose ri\elS. elongated holes and damaged
or
mi"ing fastene"
c Repair all defects to pre\ent further damage.
7 A- 7 Installation Of Engine Cowling. (p A-24-250 and PA-24-260. Seria I
"0'
24-1
10
24-4
7~
2 i ncl . and
24--1n4 to
24-4RO.~
inel )
a Po,ition the lower cowling and secure with screws to the firewall bulkhead
b
Allach the two support tubes to the aft section of the lower COWling.
c. Attach the nose gear door retraction rod
10
the gear strut.
d Connect air hoses and drain lines to the bOllom cowling.
e Attach the carburetor air bellows to the air filter with quaner turn fasteners
f Position the top cowl on the nose section and secure the two cowl channels to the fire\\all with
screw'-J. "ashen
and
nuts.
g Secure the top cowling to the firewall bulkhead and nose section with screws
h Attach the top cowl hold down straps to each cowl support channel
ISS
lED:
8/18/72
2C5
POWER PLA!\T