EBOOK - Mobile Equipment Hydraulics - A Systems and Troubleshooting Approach (Ben Watson)

I have been teaching hydraulics and fluid power systems to motor vehicle and heavy equipment technicians for over 20 years. Most of the students I have had in classes were journeymen vehicle service technicians.
These technicians generally do diagnostics and repair on every system, from the front bumper to the rear cross member. In most cases it was evident that the initial
professional training they received prepared them well for their careers. In the case of fluid power systems, it was equally evident that many of these journeymen doubted their ability to troubleshoot and repair.
For over a decade of my career, I traveled extensively, conducting training across the North American continent and into the Pacific Rim. During this time I had the opportunity to meet many dieseland heavy-equipment instructors.

In talking to them, a common thread seemed to be that although there were many quality books on fluid power systems, they were generally geared toward the technician intending to make a career in maintaining stationary and mobile hydraulic systems, and not for those interested in maintaining trucks and heavy equipment that included hydraulic systems.
These books frequently left these instructors with the impression that they were intended for engineers designing hydraulic systems and not for truck technicians.
In researching and planning this book I tried to balance the perspective I had as a novice technician with that of a professional trainer and educator. As a novice technician, I was more interested in knowing how to diagnose and repair than I was in knowing the ‘‘science’’ of a system.
As a more mature technician and as an educator, I know that understanding the science of a technology is at the very core of diagnosis. This is especially true when the symptoms are not commonplace and the usual list of faults do not prove to be the problem.
There are many books specific to the maintenance of aircrafts, stationary equipment, and to equipment of a particular manufacturer. I felt the industry needed a book that would address fluid power systems, also called hydraulic systems, from the perspective of what the truck service technician needed to know to maintain and repair truck-mounted equipment.
This book is therefore a result of the lack of learning literature that was available for the mobile equipment technician learning his craft. In this book, I have tried to avoid the use of formal language and instead use technicians’ language, and approach each topic from a technician’s perspective whenever possible.
When teaching, the best way to organize a course is to identify the knowledge or skill level of the student and move them forward, step-by-step to the targeted skill or knowledge level. Each programmed learning step should build on those skills that have already been achieved or mastered.

CHAPTER 2 Building a Basic Cylinder or Hydraulic Motor Circuit: A Non-Math Explanation of Operation ................................................. 11
CHAPTER 3 The Math . .................................................. 45
CHAPTER 4 ANSI Symbols ............................................... 57
CHAPTER 5 Oils and Other Hydraulic Fluids . . ................................. 77
CHAPTER 6 Piping, Tubing, and Hoses ....................................... 87
CHAPTER 7 Couplers and Fittings........................................... 99
CHAPTER 8 System Design .............................................. 109
CHAPTER 9 Electrical Controls . ........................................... 127
CHAPTER 10 Maintenance................................................ 145
CHAPTER 11 Troubleshooting Fluid Power Systems ............................. 159
APPENDIX 1 Conversions ................................................ 187
APPENDIX 2 Hydraulic/Fluid Power Systems . . ................................ 197

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I have been teaching hydraulics and fluid power systems to motor vehicle and heavy equipment technicians for over 20 years. Most of the students I have had in classes were journeymen vehicle service technicians.
These technicians generally do diagnostics and repair on every system, from the front bumper to the rear cross member. In most cases it was evident that the initial
professional training they received prepared them well for their careers. In the case of fluid power systems, it was equally evident that many of these journeymen doubted their ability to troubleshoot and repair.
For over a decade of my career, I traveled extensively, conducting training across the North American continent and into the Pacific Rim. During this time I had the opportunity to meet many dieseland heavy-equipment instructors.

In talking to them, a common thread seemed to be that although there were many quality books on fluid power systems, they were generally geared toward the technician intending to make a career in maintaining stationary and mobile hydraulic systems, and not for those interested in maintaining trucks and heavy equipment that included hydraulic systems.
These books frequently left these instructors with the impression that they were intended for engineers designing hydraulic systems and not for truck technicians.
In researching and planning this book I tried to balance the perspective I had as a novice technician with that of a professional trainer and educator. As a novice technician, I was more interested in knowing how to diagnose and repair than I was in knowing the ‘‘science’’ of a system.
As a more mature technician and as an educator, I know that understanding the science of a technology is at the very core of diagnosis. This is especially true when the symptoms are not commonplace and the usual list of faults do not prove to be the problem.
There are many books specific to the maintenance of aircrafts, stationary equipment, and to equipment of a particular manufacturer. I felt the industry needed a book that would address fluid power systems, also called hydraulic systems, from the perspective of what the truck service technician needed to know to maintain and repair truck-mounted equipment.
This book is therefore a result of the lack of learning literature that was available for the mobile equipment technician learning his craft. In this book, I have tried to avoid the use of formal language and instead use technicians’ language, and approach each topic from a technician’s perspective whenever possible.
When teaching, the best way to organize a course is to identify the knowledge or skill level of the student and move them forward, step-by-step to the targeted skill or knowledge level. Each programmed learning step should build on those skills that have already been achieved or mastered.

CHAPTER 2 Building a Basic Cylinder or Hydraulic Motor Circuit: A Non-Math Explanation of Operation ................................................. 11
CHAPTER 3 The Math . .................................................. 45
CHAPTER 4 ANSI Symbols ............................................... 57
CHAPTER 5 Oils and Other Hydraulic Fluids . . ................................. 77
CHAPTER 6 Piping, Tubing, and Hoses ....................................... 87
CHAPTER 7 Couplers and Fittings........................................... 99
CHAPTER 8 System Design .............................................. 109
CHAPTER 9 Electrical Controls . ........................................... 127
CHAPTER 10 Maintenance................................................ 145
CHAPTER 11 Troubleshooting Fluid Power Systems ............................. 159
APPENDIX 1 Conversions ................................................ 187
APPENDIX 2 Hydraulic/Fluid Power Systems . . ................................ 197

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Chuyên mục: C. Bài giảng C. Bài giảng chuyên ngành Nhiệt Lạnh (Heat and Refrigeration) C. Bài giảng kỹ thuật