- Explain the difference between bias-belted tires and
radial-belted tires.
- Diagram and explain in writing how to rotate bias-belted and
radial-belted tires.
- Using the manufacturer's guidelines, rotate the tires on the
vehicle.
- Explain the caster, camber, and toe-in adjustments on wheel
alignment.
- Explain why wheel alignment is important to the life of a tire.
Explain the purpose of the lateral-wear bar indicator.
Explain how to dispose of old tires properly.
Demonstrate your knowledge of engine lubrication. Do the following:
- Explain the purpose of motor oil.
- Explain where to find the recommended type and amount of oil to be
used in the vehicle engine.
- Explain the difference in viscosity (10W/30 versus SAE 30).
- Perform an oil change and oil filter change on the vehicle.
- Explain how to dispose of the used oil and filter properly.
Cooling system. Do the following:
- Explain the need for coolant in the cooling system.
- Flush and change the engine coolant in the vehicle according to the
manufacturer's instructions.
- Explain how to dispose of used coolant properly.
Demonstrate your knowledge of a fuel system. Do the following:
- Explain how the air and fuel system work together.
- Explain how a carburetor works and how a fuel-injection system
works.
- Explain how an on-board computer works with the fuel injection
system. Show where the computer is located.
- Explain why it is necessary to have an air filter and a fuel
filter. Locate them and change them according to the manufacturer's
recommendations.
- Explain what fuel additives are, for both the carburetor and the
fuel injection systems.
Demonstrate your knowledge of ignition and electrical systems. Do the
following:
- Diagram and explain the parts of the electrical system.
- Explain the cylinder engine sequence.
- Explain the spark plug gap and, if practical, change the spark
plug. (Use an engine with spark plugs that can be reached without
tilting the engine.)
- Demonstrate how to connect jumper cables on your battery properly.
Explain how to jump-start a vehicle.
- Explain the difference between electronic and points ignition
systems.
Demonstrate your knowledge of a drive train. Do the following:
- Diagram the drive train and explain the different parts.
- Explain the difference between automatic and standard
transmissions.
- Explain the types of automatic transmission fluid.
- Explain the types of lubricants used in a standard transmission and
in the differential.
- Explain the difference between front-wheel, rear-wheel, and
four-wheel drive.
- Explain the gear ratio of the differential.
Demonstrate your knowledge of a brake system. Do the following:
- Explain the brake system (including anti-lock systems) and how it
operates.
- Explain the differences between disc and drum systems.
- Demonstrate checking conditions of a vehicle brake system. After
checking, make recommendations for repairs (if necessary).
Explain the purpose, importance, and limitations of passive restraints.
BSA Advancement ID#: 127
Source: Boy Scout Requirements, #33215E, revised 2002
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