Chevrolet Light Duty Truck 1973 Service Manual page 444

6 M - 2 0 ENGINE FUEL
GAUGE BETWEEN A IR HORN WALL
AN D LOWER EDGE OF CHOKE VALVE
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LIGHTLY ROTATE CHOKE
COIL LEVER COUNTERCLOCK
W ISE UN TIL END OF ROD IS
IN END OF SLOT IN LEVER
BEND ROD
TO A D JU S T
Fig. 9C~Vacuum Break Adjustment (4MV)
2. Rotate throttle lever to wide open throttle valve
position.
3. Bend unloader tang on throttle lever to obtain
specified dimension between lower edge of choke
plate (at center) and air horn wall.
2GV (Fig. 11C)
With the throttle valves held wide open and the choke
valve held toward the closed position with a rubber
band, bend the unloader tang on the throttle lever to
obtain specified clearance between the upper edge of the
choke valve and air horn wall.
CHOKE COIL ROD ADJUSTMENT
MV (Fig. 12C)
1. Disconnect thermostatic coil rod from upper choke
lever and hold choke valve completely closed.
2. W ith thermostatic coil rod disconnected, push
downward on rod to end of travel.
3. With rod held in this position, the top of rod should
be even with bottom of hole in choke lever.
4. To adjust, bend rod at point shown.
2GV (Fig. 13C)
1. Hold choke valve completely open.
2. With the thermostatic coil rod disconnected from
upper lever, push downward on rod to end of travel.
3. W ith the rod in the fully downward position,
bottom of rod should be even with the bottom of
slotted hole in lever as shown.
4. To adjust, bend lever at point shown with
screwdriver end.
V A C U U M
PLUNGER M U S T BE
FULLY SEATED
USE OUTSID E
V A C U U M SOURCE
OPEN P R IM A R Y THROTTLE
VALVES SO TH A T FAST IDLE
C A M FOLLOWER CLEARS
FAST IDLE CA M
4MV (Fig. 14C)
1. Hold choke valve completely closed by rotating
choke coil lever counterclockwise.
2. With the thermostatic coil rod disconnected, with
cover removed, push downward on coil rod so that
the rod contacts bracket surface.
3. The coil rod must fit in choke lever notch, as shown.
4. Bend choke coil rod at point shown to adjust.
LIGHT DUTY TRUCK SERVICE MANUAL