GMC 1976 ZEO 6083 Maintenance Manual page 356

6M- 14
ENGINE FUEL SYSTEM
CARBURETOR REPLACEMENT
REMOVAL
1 . Remove engine cover.
2. Remove air cleaner. Refer to "Air Cleaner"
later in this section.
3. Disconnect vacuum hoses. Disconnect fuel in-
let line .
4. Disconnect throttle cable. Disconnect cruise
control rod if equipped .
5 . Remove air cleaner stud .
6. Disconnect choke housing pipe .
7. Remove four carburetor to manifold attaching
bolts.
8. Remove carburetor .
INSTALLATION
1 . Install a new carburetor to manifold gasket .
2. Install carburetor . Torque attaching bolts dia-
gonally to 48-96 in . lbs., then after all four are tor-
qued, retorque diagonally to 12-17 ft . lbs. The
sequence in Figure 9 is one, three, two, four .
3. Connect choke housing pipe .
4. Install air cleaner stud .
5 . Connect throttle cable. Connect cruise control
rod if removed.
6. Connect vacuum lines. Connect fuel inlet line .
Hold fuel inlet nut while connecting fuel line to avoid
damaging inlet nut nylon gasket .
7 . Install air cleaner.
8. Install engine cover.
CARBURETOR OVERHAUL
NOTE:
Before performing any service on the car-
buretor it is essential that the carburetor be
placed on a holding fixture. The secondary
throttle valves in the wide open position extend
below the throttle body casting. Without the use
of the carburetor fixture it is possible to bend or
nick the aluminum throttle valves .
2
CHOKE TUBE
THROTTLE CABLE BRACKET AND PIN
NO .2
GASKET
A-1695
Figure 9-Carburetor Installation
AIR HORN REMOVAL
1 . Remove air cleaner assembly .
VACUUM BREAK
ATTACHING SCREWS
Figure 10-Carburetor Assembly