1. Applying Preventative Maintenance Practices
Lesson 4
Applying Preventative Maintenance Practices

2. Next Generation Science / Common Core Standards Addressed!
CCSS.ELA Literacy.RST.9‐10.1 Cite specific textual evidence to support analysis of science and technical texts, attending to the precise details of explanations or descriptions.
CCSS.ELA Literacy.RST.9‐ 10.3 Follow precisely a complex multistep procedure when carrying out experiments, taking measurements, or performing technical tasks, attending to special cases or exceptions defined in the text.
CCSS.ELA Literacy. RST.11‐12.2 Determine the central ideas or conclusions of a text; summarize complex concepts, processes, or information presented in a text by paraphrasing them in simpler but still accurate terms.
CCSS.ELA Literacy.RST.11‐12.3 Follow precisely a complex multistep procedure when carrying out experiments, taking measurements, or performing technical tasks; analyze the specific results based on explanations in the text.
HSNQ.A.3 Choose a level of accuracy appropriate to limitations on measurement when reporting quantities. (HS‐PS1‐2),(HSPS1‐4),(HS‐PS1‐5),(HS‐PS1‐7)
HSSIC.B.6 Evaluate reports based on data. (HS‐LS2‐6)

3. Bell Work / Student Learning Objectives
Explain the importance of preventative maintenance on engines and equipment
Explain the safety practices to follow when servicing equipment
Identify common maintenance practices associated with major engine systems

4. Terms
Compression gage
Flooding
Preventative maintenance

5. Interest Approach
List the reasons why it is important to follow the preventative maintenance schedule.

6. Preventative maintenance
Performing of practices to keep equipment in good working condition
Properly maintaining agricultural equipment requires skill, practice, and quality management

7. Preventative maintenance practices
Changing fluids
Cleaning components
Replacing filters

8. Safety practices
Read and follow all instructions in the operator’s manual
Know all the safety emblems and warning signs used for agricultural equipment
Use protective eyewear, clothing, and footwear

9. Safety practices (continued)
Use jack stands, engine stands, and other supports
Observe caution around fuels and flammable materials
Operate internal combustion engines in well-ventilated areas
Place machines in park and lower implements before working on them

10. Safety practices (continued)
Work in well-lighted and properly ventilated areas
Regularly clean the floor and remove obstacles and fluids
Handle batteries safely
Keep fire extinguishers and smoke detectors in shop work areas

11. Safety practices (continued)
Use caution when working around high pressure
Use protective hearing devices when working in loud areas
Safely dispose of used fluids

12. Nine safety colors Red – danger Orange – warning Yellow – caution
Blue – information
Green – safety
Black & yellow diagonal lines - radioactivity

13. Nine safety colors (continued)
White – direction of traffic flows and segregate work areas
White & black stripes – traffic markings
Gray – floors or work areas in the shop

14. Nine safety colors

15. Ignition system checks
Inspect the spark plug
Inspect the spark plug wire
Check the spark output using a spark tester
Check the flywheel

16. Parts of a spark plug

17. Fuel system checks Insure that there is gas in the gas tank
Check the spark plug for gasoline
Check the flow of gas from the fuel tank to the fuel injector or carburetor on older equipment
Flooding – an excessive amount of gasoline in the carburetor in older equipment.

18. Compression system checks
Compression gage – determines compression pressure of the cylinder

19. Liquid cooling system checks
Check the hoses and belts for leaks and cracks
Maintain the proper coolant level
Keep the system clean
Use recommended coolant
Pressurize the system and check for leaks
Check the specific gravity of the coolant
Check the condition of the fan

20. Air cooling system checks
Remove dirt that can clog air passages
Make sure the pre-cleaner is in place
Check the fan
Makes sure all shrouds are in place

21. Lubrication system checks
Check the engine oil level
Change the oil and filters

22. Air intake system checks
Connect a vacuum gauge to the intake manifold
Allow the engine to run for a few minutes
Record the age reading with the engine operating
Compare the readings to the manufacturer’s specifications
Inspect the intake system for possible restrictions and leaks

23. Review/Summary
Why is it important to practice preventative maintenance on engines and equipment?
What are the safety rules to follow when servicing agricultural equipment?
What are some common maintenance practices carried out on engine systems?

24. The End!