1. Heavy Duty Entry Level Technician Course Hydraulics
Created by:
Mark D. Adair
Hydraulics
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

2. Course Instructor Mark D. Adair Experience
Hydraulics
Course Instructor
Mark D. Adair
Experience
Over 30 years working in the diesel technology field.
Factory certified technician for Cummins, Caterpillar & Detroit Diesel Engines.
Manager of numerous EPA and ARB engine test cells and emission laboratories.
Participated in the development of the first SCR, DPF ,Bio Diesel fuel & Ethanol fuel technologies ever sold in USA.
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 2 2

3. Sign-In Sheet Restrooms Parking Passes Sign-In Sheet Participant Form
Hydraulics
Sign-In Sheet
Restrooms
Parking Passes
Sign-In Sheet
Participant Form
Smoking Area
Note: Put your name in your book
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

4. Introductions Name Title Type of Vehicles in Fleet
Hydraulics
Introductions
Name
Title
Type of Vehicles in Fleet
Experience with Diesel Engines
Prior Diesel classes taken
Military Experience
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

5. Hydraulics
This module will focus on the Cummins ISL-G natural gas engine management systems.
This system uses fly by wire
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

6. Hydraulics
Disclaimer
The material presented here is intended for instructional purposes only. Please be sure to follow manufacturer’s latest bulletins and procedures as the ultimate source.
If its under warranty you must follow all Cummins procedures…..
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

7. Instructional Objectives
Hydraulics
Instructional Objectives
By the end of this course the student will be able to:
Indentify hydraulic system components and functions
Knowledge of hydraulic system safety
Knowledge of Transmission PTO and Hydraulic pumps
Knowledge refuge truck hydraulic applications
Inspecting and servicing of Hydraulics systems
Tech Tip: Bring a USB Memory Drive to Level 2 to obtain bonus electronic handout materials.
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit

8. Theory Hydraulics Hydraulics
Hydraulic machines are machinery and tools that use liquid fluid power to do simple work. 
Heavy equipment is a common example.
 Hydraulic fluid from a reservoir to a hydraulic pump.
The fluid is controlled directly or automatically by control valves.
 The fluid is distributed through hoses and tubes.
Hydraulic cylinders become pressurized according to the resistance present.
Hydraulic machinery is operated by the use of hydraulics, where a liquid is the powering medium.
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 8

9. Theory Hydraulics Hydraulics
Hydraulic machinery is operated by the use of hydraulics, where a liquid is the powering medium.
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 9

10. WARNING : FLAMMABLE Theory Hydraulics Hydraulics 10
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 10

11. Hydraulic fluid safety
Hydraulics
Theory
YOUTUBE
Click on Hyperlink below
Hydraulic fluid safety
Video length 00:54 minutes
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 11

12. Theory Components Hydraulic reservoir Hydraulics 12
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 12

13. Theory Components Hydraulic hoses Hydraulics 13
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 13

14. Theory Hose safety YOUTUBE Click on Hyperlink below
Hydraulics
Theory
YOUTUBE
Click on Hyperlink below
Hose safety
Video length 1:08 minutes
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 14

15. Theory Components Hydraulic oil filter Hydraulics
Spin-On filter Sintered metal filter (element) Element filter installation
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 15

16. Theory Components Power take off (PTO) Hydraulics 16
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 16

17. Theory Truck PTO'S YOUTUBE Click on Hyperlink below
Hydraulics
Theory
YOUTUBE
Click on Hyperlink below
Truck PTO'S
Video length 1:31 minutes
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 17

18. Theory Components Hydraulic pump Hydraulics 18
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 18

19. Theory Components Hydraulic pump Hydraulics 19
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 19

20. Theory Components Hydraulic control valves Hydraulics
Manual controls Electronic controls
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 20

21. Theory Components Hydraulic control valves Hydraulics
Manual controls/Electronic controls Electronic control solenoid
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 21

22. Theory Components Hydraulic control valves Hydraulics
Electronic controls Electronic control solenoid
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 22

23. Theory Components Hydraulic cylinders Hydraulics 23
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 23

24. Theory Components Hydraulic cylinders Hydraulics 24
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 24

25. Hydraulic cylinders in action
Hydraulics
Theory
YOUTUBE
Click on Hyperlink below
Hydraulic cylinders in action
Video length 1:31 minutes
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 25

26. Refuge truck applications
Hydraulics
Theory
YOUTUBE
Click on Hyperlink below
Refuge truck applications
Video length 9:59 minutes
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 26

27. Theory Components Refuge truck Hydraulic cylinder applications
Hydraulics
Theory
Components
Refuge truck Hydraulic cylinder applications
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 27

28. Theory Components Refuge truck Hydraulic cylinder applications
Hydraulics
Theory
Components
Refuge truck Hydraulic cylinder applications
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 28

29. Theory Components Refuge truck Hydraulic cylinder applications
Hydraulics
Theory
Components
Refuge truck Hydraulic cylinder applications
Except where otherwise noted, this work by Long Beach City College, a Department of Labor, TAACCCT funded project is licensed
under the Creative Commons Attribution 4.0 International License. To view a copy of this license, visit 29