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Lesson
Applying Preventative Maintenance
Practices
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Interest Approach
n List the reasons why it is important to follow the preventative maintenance schedule.
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Student Learning Objectives
n Explain the importance of preventative maintenance on engines and equipment.
n Explain the safety practices to follow when servicing equipment.
n Identify common maintenance practices associated with major engine systems.
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Terms
n Compression gauge n Flooding n Preventative maintenance
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Preventative Maintenance
n Performing of practices to keep equipment in good working condition. ¡ Properly maintaining agricultural
equipment requires skill, practice, and quality management.
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Preventative Maintenance Practices
n Changing fluids n Cleaning components n Replacing filters
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Safety Practices
n Read and follow all instructions in the operator’s manual.
n Know all the safety emblems and warning signs used for agricultural equipment.
n Use protective eyewear, clothing, and footwear.
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Safety Practices
n Use jackstands, engine stands, and other supports.
n Observe caution around fuels and flammable materials.
n Operate internal combustion engines in well-ventilated areas.
n Place machines in park and lower implements before working on them.
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Safety Practices
n Work in well-lighted and properly ventilated areas.
n Regularly clean the floor and remove obstacles and fluids.
n Handle batteries safely. n Keep fire extinguishers and smoke
detectors in shop work areas.
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Safety Practices
n Use caution when working around high pressure.
n Use protective hearing devices when working in loud areas.
n Safely dispose of used fluids.
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Nine Safety Colors
n Red – danger n Orange – warning n Yellow – caution n Blue – information n Green – safety n Black & yellow diagonal lines -
radioactivity
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Nine Safety Colors
n White – direction of traffic flows and segregate work areas.
n White & black stripes – traffic markings.
n Gray – floors or work areas in the shop.
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Nine safety colors
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Ignition System Checks
n Inspect the spark plug. n Inspect the spark plug wire. n Check the spark output using a
spark tester. n Check the flywheel.
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Parts of a
spark plug
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Fuel System Checks
n Insure that there is gas in the gas tank.
n Check the spark plug for gasoline. n Check the flow of gas from the fuel
tank to the carburetor. n Flooding – an excessive amount of
gasoline in the carburetor.
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Parts of a Carburetor
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Compression System Checks
n Compression gage – determines compression pressure of the cylinder.
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Liquid Cooling System Checks
n Check the hoses and belts for leaks and cracks.
n Maintain the proper coolant level. n Keep the system clean. n Use recommended coolant. n Pressurize the system and check for
leaks. n Check the specific gravity of the coolant. n Check the condition of the fan.
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Air Cooling System Checks
n Remove dirt that can clog air passages
n Make sure the precleaner is in place
n Check the fan n Makes sure all shrouds are in place
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Lubrication System Checks
n Check the engine oil level n Change the oil and filters
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Air Intake System Checks
n Connect a vacuum gage to the intake manifold
n Allow the engine to run for a few minutes n Record the age reading with the engine
operating n Compare the readings to the manufacturer’s
specifications n Inspect the intake system for possible
restrictions and leaks
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Review/Summary
n Why is it important to practice preventative maintenance on engines and equipment?
n What are the safety rules to follow when servicing agricultural equipment?
n What are some common maintenance practices carried out on engine systems?