Vaz -21213 Repair Manual page 53

Fig.2-89. Carburettor housing components:
1 - accelerator pump diaphragm; 2 - operating lever, accelerator pump; 3 - cover; 4 - cam, accelerator pump linkage; 5 - cover, part throttle enrichment; 6 - diaphragm,
part throttle enrichment; 7 - fuel jet, part throttle enrichment; 8 - valve, part throttle enrichment; 9 - return valve, accelerator pump; 10 - atomizer and fuel feed valve, accel-
erator pump;11 - main metering atomizers; 12 - main air jets with emulsion tubes; 13 - main fuel jets; 14 - bracket to secure choke outer cable end; 15 - adjusting screw,
secondary barrel; 16 - stop, adjusting screw; 17 - cap, stop; 18 - primary throttle opening adjusting screw; 19 - primary throttle spindle and operating levers; 20 - secondary
lock lever; 21 - lock lever spring; 22 - secondary throttle shaft and lever; 23 - primary throttle valve; 24 - secondary throttle valve; 25 - idle mixture adjustment screw cap;
26 - return spring, secondary throttle lever; 27 - idle mixture adjustment screw; 28 - carburettor body; 29 - throttle stop screw (CO adjustment); 30 - idle switch wire; 31 -
part throttle channel heater
Float components. Wash the components in petrol and
examine them. The floats must have no damages. Check to see
there are no damages on the needle valve sealing face and seat
which can result in the valve leakage. The valve must easily oper-
ate in its socket, the ball should not stick. The float weight should
not exceed 6.23 gram. Renew any damaged components.
Carburettor cover. Clean any dirt or oil from the cover, clean
all passages and holes. Wash the cover in acetone or petrol, blow
dry with compressed air. Examine the cover sealing surfaces.
Renew the cover in there are any damages.
Choke control unit. Wash in petrol and blow dry all choke
control associated components. Inspect the parts and renew
when applicable.
Jets and emulsion tubes. Clean out the jets and emulsion
pipes from dirt, gummy substances, wash in acetone or petrol,
then blow dry with compressed air.
Do not use any metal tool or wire for cleaning the jets; never
wipe the jets or other carburettor components with cotton wool,
cloths or rags, since lint can foul up the fuel-emulsion ducting.
When excessively dirty, clear the jets with the help of a soft wood-
en needle soaked in acetone.
Carburettor housing. Clean the housing from dirt or oil.
Wash the passages with acetone or petrol, blow dry with com-
pressed air. Where applicable, use special tools for cleaning the
ports and emulsion tubes. Examine the sealing surfaces of the
housing; when found damaged or distorted, renew the housing
with a new one.
Accelerator pump. Clean out the pump components, wash
in petrol and blow dry with compressed air. Check to see the ball
in the atomizers and moving parts (lever, diaphragm compo-
nents) operate smoothly. There must be no seizures or sticking.
The diaphragm should be intact and undamaged. Examine all
sealing surfaces and gaskets. Always renew any damaged com-
ponents.
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