Hudson 1947 3/4-TON COMMERCIAL, Руководство пользователя

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CARBURETORS
The carburetors used on all models are of the down-draft, automatic choke type, incorpo-
rating vacuum controlled metering rods, anti-percolator valve, accelerating pump, and
fast idle features. A filter screen is also incorporated at the fuel inlet to prevent the
entrance of foreign particles which would otherwise clog the small drilled passages and
jets in the carburetor.
All models use a Duplex (double barrel) type carburetor, Fig. 16, incorporating two
metering rods, one for each barrel.
ADJUSTMENTS--There are no adjustments on the carburetor that will affect high
speed operation. Therefore, any servicing the carburetor may require, other than minor
adjustments that affect operation at idle speed only, should be performed by your Authorized
Hudson Dealer who has the special tools and gauges required to service these units.
IDLE MIXTURE ADJUSTMENT—This adjustment is made by turning both idle
adjusting screws (A), Fig. 16. The normal position of these screws is
1
/4 to 1 turn off
their seats. To adjust them turn both screws into their seats and then out exactly
3
/
4
of a turn.
Readjust for smooth idling. Turning the screws in a clockwise direction produces a leaner
mixture and turning them in a counter-clockwise direction results in a richer mixture.
THROTTLE ADJUSTING SCREW (B), Fig. 16, controls the engine idle speed.
This screw should be adjusted to give a speed of 7
1
/2 to 8 miles per hour in high gear.
Note: Before making the Idle Mixture
and Throttle Adjusting Screw Adjustments
be sure the engine has been
run, long enough
to reach normal operating temperature.
Never make the adjustments when en-
gine is cold.
If these adjustments do not produce
satisfactory results, the engine may require
an Engine Tune-up and you should consult
your Authorized Hudson Dealer.
AUTOMATIC CHOKE CONTROL
automatically proportions the fuel and air
requirements for both starting and engine
warm-up.
The thermostatic housing spring which is
contained within the thermostat housing (C),
Fig. 16, is calibrated to hold the choke valve
closed at a temperature of 75° F. when it is set at the factory. As the engine warms
up the hot air drawn into the thermostat housing through a stove attached to the
exhaust manifold on 6 cylinder models and through a pipe passing through the
exhaust manifold with t
he opening below the floor of the manifold on 8 cylinder
32 HUDSON OWNER’S MANUAL
Figure 15