1. Tractor Safety, Operation, and Maintenance
Tractor Systems
A VGP Production 2003

2. Tractor Systems
The tractor has many systems that must be properly serviced and maintained to insure long life and service.

3. Engine Classifications
With the demise of the steam powered tractor in the late 1800’s, most modern tractors are equipped with internal combustion engines.
Internal combustion engines are identified by the number of strokes
in the cycle and by the fuel that is used to run them.
Common Tractor Classifications:
4 stroke cycle
- gasoline
- diesel
- LP

4. Engine Internal Components

5. Four Stroke Cycle

6. Major Systems Intake Exhaust Lubricating Electrical Cooling Fuel
Hydraulic
Drive Train

7. Intake System Parts: Pre-Cleaner Air Cleaner Intake Manifold
Intake Valve
Turbocharger (if used)
Intercooler (if used)

8. Exhaust System
Parts:
Exhaust Valve
Exhaust Manifold
Muffler
Cap

9. Lubricating System Full Flow & By-Pass
Parts:
Crankcase Oil Reservoir (Oil Pan)
Oil Pump
Pressure Regulating Valve
Pressure Gauge
Oil Filter
Oil Passages

10. Lubricating System Full Flow & By-Pass
Oil goes to:
Camshaft Bearings
Crankshaft Main Bearings
Piston Pin Bearing
Valve Tappet Shaft

11. Electrical System Parts: Battery Ground Cable Key Switch Ammeter
Voltage Regulator
Starter Solenoid
Starter
Distributor * Gasoline Only
Coil
Alternator
Spark Plug
Power Cable

12. Cooling System Liquid & Air
Parts:
Radiator
Pressure Cap
Fan
Fan Belt
Water Pump
Engine Water Jacket
Thermostat
Connecting Hoses
Liquid or Coolant

13. Fuel Systems
Gasoline
Diesel
Liquid Propane (LP)

14. Gasoline Fuel System Parts: 1. Fuel Tank 2. Fuel Pump 3. Fuel Filter
4. Fuel Lines
5. Fuel Intake
6. Carburetor

15. Diesel Fuel System Parts: 1. Fuel Tank 2. Fuel Pump 3. Fuel Filters
4. Injection Pump
5. Injection Nozzles

16. L P Fuel System Parts: 1. Fuel Tank 2. Fuel Strainer 3. Converter
4. Carburetor

17. Hydraulic System Open & Closed
Parts: Reservoir Lines
2. Accumulator or Variable Displacement Pump Fluid
3. Cooler filter
4. Valves

18. Power Transmission Mechanical & Hydraulic
Parts:
Clutch Pedal
Clutch
Shift Controls
Transmission
Differential
Differential Lock Pedal
Final Drives
Power Take Off (PTO)

19. THE END