Chevrolet 30 Series 1967 Service Manual page 327

3. Loosen choke cable clamp at carburetor bracket and
adjust cable through the clip until the choke valve is
wide open.
4. Tighten cable clamp at carburetor bracket and check
operation of choke valve to ensure full closed and
wide open positions.
5. Install air cleaner.
Additional Adjustments
The following adjustments may be made without remov­
ing the carburetor from the engine. For procedure refer
to Section M of the Overhaul Manual under the carbure­
6
tor being serviced.
R o c h e s t e r B
• Float
• Idle Vent
R o c h e s t e r 2 G
Float
•
• Accelerator Pump
• Idle Vent
• Choke Rod (Fast Idle)
R o c h e s t e r 4 G
• Float
• Accelerator Pump
• Idle Vent
• Air Valve
• Choke Rod
C a r t e r Y F
Float
•
• Idle Vent
• Choke Rod (Fast Idle)
Removal
Flooding, stumble on acceleration and other perform­
ance complaints are, in many instances, caused by the
presence of dirt, water, or other foreign matter in the
carburetor. To aid in diagnosing the cause of the com­
plaint, the carburetor should be carefully removed from
the engine without draining the fuel from the bowl.
contents of the fuel bowl may then be examined for con­
tamination as the carburetor is disassembled.
1. Remove air cleaner and gasket.
2. Disconnect fuel and vacuum lines from carburetor.
3. Disconnect choke cable.
4. Disconnect accelerator linkage.
5. If equipped with Automatic transmission, disconnect
TV linkage.
. Remove carburetor
6
carburetor.
Test Before Installation
It is good shop practice to fill the carburetor bowl be­
fore installing the carburetor.
on the starting motor and battery and reduces the possi­
bility of backfiring while attempting to start the engine.
A fuel pump clamped to the bench, a small supply of fuel
and the necessary fittings enable the carburetor to be
filled and the operation of the float and intake needle and
seat to be checked. Operate the throttle several times
and check the discharge from the pump jets before in­
stalling the carburetor.
attaching nuts and remove
This reduces the strain
Installation
1. Be certain throttle body and intake manifold sealing
surfaces are clean.
2. Install new carburetor to manifold flange gasket (if
required).
3. Install carburetor over manifold studs.
4. Start vacuum and fuel lines at carburetor.
5. Install attaching nuts and tighten securely.
. Tighten fuel and vacuum lines.
6
7. Connect and adjust accelerator and TV linkage.
. Connect choke tube or choke rod.
8
9. Adjust idle speed and mixture, then install air
cleaner.
Fuel Filter Maintenance
1. Disconnect fuel line connection at inlet fuel filter nut.
2. Remove inlet fuel filter nut from carburetor with a
" box wrench or socket.
1
3. Remove filter element and spring (fig. 5c).
4. Check element for restriction by blowing on cone
end, element should allow air to pass freely.
5. Clean element by washing in solvent and blowing out.
Blow in opposite direction of fuel flow.
NOTE:
Element should be replaced if plugged
or if flooding occurs. A plugged filter will re­
sult in a loss of engine power or rough (pulsat­
ing) engine feel, especially at high engine speeds.
. Install element spring, then install element in carbu­
6
retor so small section of cone faces out.
7. Install new gasket on inlet fitting nut then install nut
in carburetor and tighten securely.
. Install fuel line and tighten connector.
8
Throttle Linkage Adjustment
M o d e l s : C E 1 0 - 2 0 - 3 0 - 4 0 - 5 0 - 6 0
G E
M E
10-20,
50-60, PS 10,
S P R IN G
The
FILTER
ENGINE FUEL 6M-3
C S 1 0 - 2 0 - 3 0 r
K E 1 0 - 2 0 K S 1 0 - 2 0 ,
,
S E
,
50-60
CHEVROLET TRUCK SERVICE M ANUAL