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THIS WORK IS RESPECTFULLY DEDICATED TO THE BACKBONE
OF OUR NATIONAL PROSPERITY THE AMERICAN FARMER
TABLE OF CONTENTS
CHAPTER I.
The Scope, Advantages and Applications of Power
Traction.
Influence of Mechanical Power on the Arts-Application of
Power in Agriculture-Advantages of Power Traction-
Comparison Between Work of Horse and Tractor-Thermal
Efficiency of Horse-Tractor Furnishes Power for Various
Farm Machines-Economical Aspect of Power Traction-
Analysis of Requirements of Ideal Tractor-Practical
Prime Movers-Comparing Steam and Gas Power from a
Practical Point of View-Efficiency of Steam and Gas
Power-Why Gas Tractors are Most Popular. 33-60
CHAPTER II.
Review of Conditions on Which Tractor Design is
Based.
Elements of Tractor Design Outlined-Selection of Power
Plant-Power Needed for Hauling-Energy Absorbed by
Ploughs-Power Delivery under Belt-Why Proper Dis-
tribution of Weight is Essential-Influence of Weight on
Traction-Influence of Road or Field Surface on Traction-
Effect of Grades on Traction-Types of Tractors-Traction
Engines for Small or Medium Sized Farms-Large Capacity
Tractors-Parts of Typical Tractors Outlined-Some
Distinctive Designs
61-91
CHAPTER III.
Design and Construction of Gas Tractor Power
Plants.
Power Rating Basis-Indicated, Brake and Drawbar Horse-
power-Types of Gas Engines-Comparing Two and Four
Stroke Cycle Power Plants-Operating Principles of Four-
Cycle Engine-How Two Cycle Engine Works-Advan-
tages of One Cylinder Motors-Features of Multiple
Cylinder Motors-Heavy Duty and Medium Duty
Engines-One Cylinder Tractor Engines-Two Cylinder
Engines-Three Cylinder Power Plant-Tractor Motors
With Four Cylinders 92-126
CHAPTER IV.
Gas Tractor Power Plant Components.
Parts of Tractor Engines and Their Functions-Cylinder
Construction-The Valve System-Piston and Rings-
Connecting Rod Types-Crankshaft Forms-Utility of
Flywheel-Engine Base and Bearings
CHAPTER V.
Making and Exploding the Gas.
127-152
The Liquid Fuels-Gasoline-Kerosene-Alcohol-Elements of
Carburetion-Simple Mixing Valves-Float Feed Car-
buretor Action-Automatic Carburetors-Parts of Car-
buretors-Typical Gasoline Carburetors-Carburetor for
Two Cycle Engine-Action of Kerosene Vaporizer-
Methods of Exploding Charge-Advantages of Elec-
tric Ignition- Methods of Producing Current-Dry
and Storage Batteries-Function of Induction Coil-
Producing Spark in Cylinders-Mechanical Generator
Advantages-Types of Magnetos-Oscillating Armature
Forms-Types with Revolving Armature-True High
Tension Device-Low Tension Ignition System-Simple
Battery Ignition Methods-Action of Magneto Ignition
System-Timing the Spark 153-218
CHAPTER VI.
Cooling and Lubricating the Power Plant.
Reason for Cooling Engine-Thermo-Syphon System-Forced
Circulation Method-Oil Cooling Features-Parts of
Cooling System-The Pump-The Cooling Fan-The
Radiator-Why Engines Are Oiled-Different Lubricating
Mediums-Simple Gravity Oil Cup Method-Mechanical
Oiling Systems-Constant Level Splash System. 219-244
CHAPTER VII.
Functions and Construction of Clutch, Gearset
and Differential.
Why Clutch is Needed-Action of Simple Clutch Described-
Some Typical Tractor Clutches-Friction Disc and Roll
Clutches-Why Reversing Mechanism is Needed-Typical
Reversing Mechanism-Why Speed Changing is Necessary
—Action of Simple Change Speed Gear Outlined-The
Differential Gear and Its Use . 245-281
CHAPTER VIII.
The Tractor Frame, Wheels and Axles.
Construction of Tractor Frames-Typical Frames Described-
Why Three Point Support is Needed-Facts Concerning
Tractor Wheels-Methods of Construction-Action and
Advantages of the Caterpillar Tread-Tractor Front
Axles-How Tractors Are Steered-Automatic Steering
Arrangements-Methods of Final Drive-The Conventional
Method-Use of Chains and Sprockets-Live Axle
Forms 282-325
CHAPTER IX.
Driving and Housing the Traction Engine.
How to Start Traction Engines-How to Start Tractor-
Typical Tractor Control Systems-Advice on Tractor
Operation-Housing the Tractor-Combined Tractor House
and Farm Workshop-Fuel Storage Methods-Tools and
Equipment for Care of Tractor
326-365