Service Adjustment Procedures; Float Level Adjustment; Air Horn Screw Tightening Sequence - Jeep J-10 Series 1982 Technical & Service Manual

(30) Rotate fast idle cam to full UP position and tilt
air horn assembly to engage fast idle cam rod in slot in
fast idle cam (fig. 1J-32). Next, holding down on pump
plunger assembly, carefully lower air horn assembly
onto float bowl while guiding pump plunger stem
through hole in air horn casting.
NOTE: Do not force air horn assembly onto bowl
(31) Install vent screen assembly on air horn assem
bly (fig. 1J-31) and install six air horn-to-bowl attaching
screws and lockwashers.
NOTE: Three medium long air horn screws are in
stalled in the primary and secondary venturi area The
two longer screws hold the vent screen assembly in
place. The two short screws are installed on the fuel
inlet side. One short screw is installed in the area be
neath the hot idle compensator valve. All air horn
screws must be tightened evenly and securely. Refer to
figure U-50 for proper tightening sequence.
90716
Rg. U-50 Model 2SE Carburetor-
Air Horn Screw Tightening Sequence
(32) If equipped, install replacement seal in recess of
float bowl. Install hot idle compensator valve and retain
with two small attaching screws. Tighten screws
securely.
(33) Install plastic bushing in hole in choke lever.
Ensure small end of bushing faces retaining clip when
installed. With inner choke coil lever at 12 o'clock posi
tion, insert intermediate choke rod in bushing. Retain
rod with replacement clip using needlenose pliers.
NOTE: Retaining clip is "dished." Install clip on rod
with outward bend ofself-locking lugs facing end ofrod.
Ensure that clip fully engages rod and that clip is not
distorted.
CAUTION: Use care when tightening nut to avoid
damaging vacuum break diaphragm plunger.
FUEL SYSTEMS U-25
(34) If removed, install solenoid in hole on bracket
with large lockwasher and retaining nut. Tighten nut
securely and bend back two retaining tabs on lock
washer and position in slots in bracket.
(35) Rotate solenoid bracket and insert end of vac
uum break rod into inner slot and end of air valve rod
into outer slot of vacuum break diaphragm plunger.
Install bracket over locating lugs on air horn. Install
tapered-seat screw in air horn and screw with lock
washer in throttle body. Tighten screws securely (fig.
1J-28).
NOTE: Do not connect vacuum break hose until after
vacuum break adjustment is completed (refer to Service
Adjustment Procedures).
(36) Insert pump rod in hole in pump lever by rotat
ing lever (fig. 1J-27). Install retaining screw in pump
lever, then washer. While holding down on pump
plunger stem, install pump lever on air horn. Ensure
shoulder on screw seats in hole in lever and washer is
positioned between lever and air horn casting. Tighten
screw securely.
NOTE: The vacuum break and choke rod (fast idle
cam) adjustments must be completed, and the bimetallic
coil lever inside the choke housing must be indexed
properly before the choke bimetallic coil and cover as
sembly are installed. Refer to the Service Adjustment
Procedures.
(37) Place fast idle screw on highest step of fast idle
cam.
(38) Install cover and bimetallic coil assembly on
choke housing, aligning notch in cover with raised cas
ting projection on housing cover flange. Ensure coil
pickup tang engages inside choke coil lever.
(39) Install three choke cover retainers with three
drive rivets.
(40) With small punch and hammer, drive rivet pin
into each rivet to expand and seat rivets in place.
NOTE: Ground contact for the choke electric heater is
provided by a metal plate located at the rear of the choke
assembly. Do not install a gasket between the choke
cover assembly and the choke housing. The choke heater
will iwt operate unless properly grounded.
SERVICE ADJUSTMENT PROCEDURES
Float Level Adjustment
With the air horn removed:
(1) Hold retainer pin firmly in place and push float
down lightly against needle (fig. 1J-51).
(2) Using adjustable "T" scale, at a point 3/16 inch
(4.8 mm) from end of float at toe, measure distance from
float bowl top surface (gasket removed) to top of float at
toe (fig. 1J-51).