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Modern Diesel Technology Heavy Equipment Systems 2nd Edition by Robert Huzij, Angelo Spano, and Sean Bennett | PDF Free Download.
In approaching this 2nd Edition revision of Modern Diesel Technology (MDT) Heavy Equipment Systems, the author team accepted the reality that the first edition was not used as a stand-alone textbook by Heavy Equipment specialty programs.
For this reason, we made the decision to drop a couple of chapters that more or less repeated content already covered in Heavy Duty Truck Systems, which tends to be used as a companion to this book.
The trade-off was a real plus because it opened up space to add three brand-new chapters that are totally Heavy Equipment specific.
One of these, the hoisting and rigging chapter, is essential to anyone working with heavy off-road machinery, and it came about as a result of feedback requests from our reviewers, a reinforcement of just how important it is to listen to our users.
Because of this, we have located this chapter immediately following the chapter on safety. In the modern post-secondary environment, it is necessary to use multiple textbooks and online resources along with OEM service literature in order to meet increasingly more exacting exit competencies... and employer expectations of entry-level employees.
MDT Heavy Equipment Systems has no current competitors because it competes in a relatively small market in which the alternatives are extremely out of date.
The author team opted to keep this book as up to date as possible, but there is only just so much that can be packed in, given the page count limitations we are required to work within, so we have only addressed the technology that is unique to heavy equipment.
The bottom line is that there are current textbooks that adequately cover subject matter such as diesel engines, electronic system management, and multiplexing, along with those chassis systems that are common to both commercial vehicles, agricultural, and heavy off-road equipment.
Technology continues to change at an astounding rate. The spectrum of technology used in the heavy equipment field is much broader than in the automotive or heavy commercial vehicle fields.
Because a price tag of $5 million is not unheard of for a single piece of equipment, there is a major incentive to maximize machine longevity: for this reason, we see equipment repaired rather than replaced with more frequency than in other motive power areas.
This emphasizes the importance of repair techniques for heavy equipment technicians, rather than the diagnose/ replace techs that are more common in the truck service and repair industry.
In a current open-face mining operation, it is not unusual to observe 30-year-old machinery operating alongside brand-new equipment.
The hydromechanical controls common a generation ago have generally given way to computer-processed, data bus-driven, pilot-actuated circuits.
To work on the hydraulic circuits in modern equipment, it is a requirement that the repair technician understands the electronics that manage the hydraulics.
The challenge we face as educators in this field in keeping up with technological changes is a daunting one, and a good education program should be based on more than reliance on a single textbook: it should be complemented by online references and OEM support literature.
In addition, both instructors and their students can benefit from observation and participation in online discussion threads such as in iatn (www.iatn.net) troubleshooting discussions: the trick is to teach students and technicians into how to manage the excess of information available, and learn how to discard what is not accurate.
The approach used in this book is to deliver the fundamentals in each subject area, before progressing to the components and circuits specific to off-road equipment.
As indicated earlier in the preface, this book does not pretend to cover everything the novice heavy equipment technician is required to know before pulling a wrench.
What has been added or removed from this second edition has been done with the objective of optimizing its content, and maximizing its usefulness to the heavy equipment technician.
The chapter on safety has been enhanced with additional emphasis on hydraulic safety related to high oil temperatures and high-pressure hazards.
Also in this chapter, a new section has been added that explains the importance of OPS, ROPS, and FOPS systems on offroad equipment.
Following the chapter on safety, a new chapter on hoisting and rigging techniques has been added, explaining safety and handling techniques that are essential and distinct to this field.
The hydraulics section, which consists of four chapters in this revised edition, has been enlarged to address the importance and complexity of modern hydraulic systems.
More emphasis has been placed on interpreting hydraulic symbols and schematics, and the sections on maintenance and diagnostics, troubleshooting basics, and bleeding procedures for hydraulic pumps have all been expanded.
The chapter on final drives has been enlarged to include a new section on double reduction drives along with a technical updating of the existing drive systems.
The chapter on tracks and undercarriages has been updated to reflect some of the new maintenance practices used on-track equipment.
Electronic system management has been covered within the core chapters and further enhanced in a new chapter titled Machine and Equipment Electronics, which takes a closer look at how off-road industries use multiplexing and devices such as haptic joysticks, which are not used on-highway vehicles.
The book ends with a brand-new chapter on AC-drive systems: the AC drivetrain provides a good model for increasingly used hybrid drive technology and the system described in this book is adaptable to AC trolley drive, which has significant appeal in modern open-face mining operations because of its ability to significantly reduce fuel and downtime costs.
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