Piper PA-24 Comanche Service Manual page 460

PIPER COMANCHE SERVICE MANUAL
•
Adjust idle speed
and
mixture. (Refer
to
pancnPh 1C....3.)
Install en,ine cowlinl. (Refer to parqraph 7C·1.)
J.
1C41. InnaUadoa Of Fuel Injector.
a. In:r-..3ll mIXtUre concrol cable bracket on injector unit and secure with
screws
and safety wire.
b. Install injector unit with
psket
on enpne and hold in place witl:a washers and nua on the two
front mounnn, studs.
c.
1nsW1
the inboard turbocharpr
support braces scc:urinc
them
to
ach
aft injector mountint srud.
to
each
turbocharpr inboard mounUntIUl and to the eftlinc
sump.
d.
Safety the fuel injectOr lIlOuntiDI nulS with pal
DUIS
and safety wire the cap screws seCUM!I the
turbochuJer
support braces
to the
eqiDc
sump.
e. Connect the inlet and oudet fuelliDes to the iDjeCtorunit.
f. Connect the throttle and mixtureconrrol cables
to
the injee:tOr unit and adjult per parqn.ph
1C-42.
,. IllIW1acion compteslOr dischatp box with
pet
OD
injectOr unit and sceure with cap
screws
and
s&fety wire. .
h. Connect flexible dum from compressor outlet to compreuor
discharge
box and secure with
damps.
i,
1C-42. Adjustment Of Thrordc And Mlxrun
Con~ls.
Thc throttle and mixture controls are adjusted
when the throttle um on the injector is rotated forwll'Cl apinst its
full throttle stop and the mixture ann is
rotated forward .ainst ia full rich
stOp,
their respective cockpit control should be
.062
of an inch in from
their full forward
SlOpS.
a. At the injector. disconnect the throttle and/or mixture control cable end from its control ann.
b. Loosen the jam nut
SCC\lnn,
the cable end.
c.
Adjust the Iink.,c by rotating the cable md to obtain the .062 of an inch spring back of the
cockpit control lever when the throttle or mixture control ann contactS its StOp.
d. Reconnect the cable end to its control
ann
and
secure
jam nut.
c. Pull the throtde and mixture controls in t.he cockpit full aft to ascertain that the injector idle
screw contacts its
SlOp
ud the mixture cona-olann contaCts its lun position.
•
1C
4
3. Adjultlllatt Of Idle Speed AlId Mixture.
1.
Start the enginc and
warm
'up in the usual manner until oil and cylinder head temperatures are
normal.
b. Check mapcros. If the "lftII"drop" is normal. proceed with idle ¥ijuscment.
c. Close the throttle to idle. If the RPM changes appreciably after maJt.ing the idle mixture
adjustment during the succcedinl steps. readjust the idle speed to the desired RPM.
NOTE
The idle mixture must be adjUSted with the fuel boose pump
"ON".
POWER PLANT
ISSUED: 8/18/72
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H8