Saab 95 1967, Service Manual

Page: 88 / 610

95) the designation is 28—32 PDSlT—7. As from engine
No. 16 101 (chassis No. 434.174— for the Saab 96 and
Monte Carlo, and No. 46.138— for the Saab 95),the de-
sngnation is 32 PDSlT—4.
CARBURETOR,
UP TO AND INCL. ENGINE NO. 16100.
LEFTHAND VIEW
1. Fuel inlet
2. Acceleration pump
3. Idling fuel jet
4. Air-regulating screw, idling mixture
5. Vacuum outlet
6. Adjusting screw, idling
7. Throttle control
ply is regulated by fixed jets mounted in the
The body contains not only fuel drillings
d a certain amount of air is mixed
an early stage in the emulsion tube,
eatures an automatic choke device with
eleration pump and a pressure—co”.
em known as an econostat. The va-
5 are dealt with in the following
The fuel sup
carburetor body.
but also air drillings an
with the fuel at
The carburetor f
rapid idling, an acc
trolled booster syst
rious carburetor function
sections.
The illustr .
the functions described ref
ations show carburetor 28—32 PDS|T_7, but
er to carburetor 32 PDSlT_4
as well.
Float system
The fuel level in the float chamber is adjusted by means
of the float. As the fuel flows into the chamber, the float
is lifted up and presses the needle valve against the seat.
As soon as the correct level is reached, the fuel supply is
cut off. The procedure is repeated when the level falls.
The float is made of nylon and is fitted with a fixed lever.
In order to keep the float level stable, the needle valve
is fitted with a spring-loaded ball. The float chamber is
internally ventilated, Le. the ventilation emanates in the
neck of the carburetor. Carburetor 32 PDSlT—4 is, how-
ever, equipped with a valve which opens when the throttle
valve is closed, the float chamber then being ventilated
outwards.
FLOAT SYSTEM
1. Ventilation duct
2. Float
3. Float valve
4. Fuel hose connection
5. Holder
6. Shaft
200—6
mm 1977