Hudson Terraplane De Luxe 1935, Owner'S Manual

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When the choke is closed the bar (D) is dropped behind the throttle stop
screw (E) to increase the idling speed during the warm-up period. This,
however, cannot drop into position until the throttle has been opened.
The heat control valve (F) is automatic in operation, supplying the correct
amount of heat to the intake manifold under all operating temperatures.
The air cleaner and carburetor silencer consists of a sound absorbing
chamber, on top of which is mounted a filter unit. The filter unit should be
removed and washed in gasoline every 2,000 miles and re-oiled by dipping in
S. A. E. 50 engine oil. Drain excess oil before replacing. The removal of wing
nut (G) permits the removal of the cleaner element.
The fuel pump is driven by a cam on the camshaft. The fuel delivery is
controlled by the carburetor float and valve. The cap screw holding the cover
in place should be removed, permitting the removal of the cover and filter
screen for cleaning every 2,000 miles. At the same time the drain plug, located
just below the pump cutlet, should be removed and the sediment chamber
cleaned. This should be done, particularly in cold weather, to remove any
water which may have accumulated.
Engine Tuning
Do not attempt to adjust the carburetor alone. Perform all of the following
operations in the order given:
1. Clean spark plugs and adjust gaps to .022".
2. Clean distributor breaker points and adjust to .020" maximum opening
as described under Ignition System. (Page 16.)
3. Check battery and ignition wiring, being sure all distributor wires are
pressed down in their sockets and insulation is in good condition.
4. Set ignition as described under Ignition System. (Page 16.)
5. Turn carburetor idling screw (H) into its seat and back out exactly one
turn.
6. Start engine.
7. When engine has reached normal operating temperature, adjust intake
valve tappet clearance to .006" and exhaust tappet clearance to .008".
8. Set carburetor throttle stop screw (E) so that engine idles at a speed
equal to a car speed of 7 miles per hour in high gear.
9. Adjust carburetor idling screw (H) for smooth engine idling. The final
adjustment should be from ½ to 1 turn of the screw from its full in
position.
10. Road test for final ignition timing as described under Ignition System.
If the above operations, properly performed, do not give normal engine
performance, the car should be taken to an Authorized Terraplane and Hudson
Dealer for mechanical inspection.
OWNER'S MANUAL 19