| CONNECTION TO GASOLINE TANK | SUCTION TUBE CONNECTION TO INTAKE MANIFOLD |
| STRAINER | VENT TUBE CONNECTION |
| COVER | |
| ATMOSPHERIC VALVE | |
| SUCTION VALVE | |
| VALVE LEVER | |
| INNER TANK | |
| SPRINGS | |
| OUTER TANK | |
| FLOAT LEVER | |
| FLOAT | |
| GUIDE | |
| FLAPPER VALVE | |
| DRAIN PLUG | CONNECTION TO CARBURETOR |
Fig. 53. Vacuum System—Inside View of Parts—Stewart Warner
Filling the Vacuum Tank.—To fill the tank after it has been cleaned or repaired, leave the spark off, close the gas throttle, and crank the engine over a few times with the starter or by hand. It takes less than ten seconds to create sufficient vacuum to fill the tank.
CHAPTER XIV
ELECTRICAL DICTIONARY OF PARTS, UNITS AND TERMS
Before taking up the study of automobile ignition systems and electrical appliances, we will first devote a little time to study, in order to become familiar with the different electrical parts, functions, terms and names applied to the various units, and machines.
In the first place electricity is not a juice or fluid that flows through a wire, but is a generated electro-motive force that may be held in storage or conducted from one place to another. It will not flow without a round circuit and seeks ground return at the slightest opportunity. It is designated in terms which express quality, quantity, force and action.
Voltage.—A volt is an electrical unit, expressing the force or pressure of the current. The voltage of a system simply means the difference of pressure exerted on the system measured in volts.
Ampere.—An ampere is an electrical unit expressing the quality or intensity of the current.
Ohm.—An ohm is an electrical unit expressing resistance; or the resistance of conductors to the flow of current.
Current.—The current is the generated electro-motive force.