Course Purpose
Participants will be able to explain the function, design, and construction of DC cranes and the control equipment; interpret crane control prints; and troubleshoot crane control faults.
- Course Number: MUS-305
- Type: Instructor-led
- Technology: Craft Skills
- Category: Understand
- Duration: 3 days
Objectives
After completing this course, students should be able to perform the following tasks:
- Identify and explain component layout of a crane
- Describe the function and operation of electrical components associated with DC cranes
- List and describe the purpose of components located in a DC power control system
- Describe the operation of DC motors
- Analyze a DC schematic to determine failed component
- Demonstrate proper troubleshooting techniques
- Demonstrate proper maintenance associated with cranes
Who Should Attend
This course is designed for mechanical maintenance technicians.
Prerequisites
To successfully complete this course, the following prerequisites are required:
- Understanding of electrical theory and electrical systems
Student Materials
To enhance and facilitate the students’ learning experiences, the following materials are provided as part of the course package:
- Student Manual includes the key concepts, definitions, examples, and activities presented in this course
- Lab Guide includes the hands-on exercises
Hands-on Practice
Throughout this course, you will have the opportunity to practice the skills you have learned through a variety of hands-on exercises. These exercises focus on the skills introduced in each lesson. You will also have the opportunity to combine and practice groups of key skills by completing multiple integrated practices during the course.
Next Level Learning
Once you have mastered the skills covered in this course, you may want to attend specific training, such as:
- Motor Control and Troubleshooting course (EMS-230)
Course Agenda
Day 1
- Detailing Power Circuits
- Tracing Control Circuits
- Operating Series Motors
- Operating Shunt Motors
- Listing Crane Hoist Controls
- Describing Hoist Points 1-5
- Troubleshooting Hoist Direction
Day 2
- Explaining crane lowering controls
- Defining lowering principles
- Identifying collector shoes
- Identifying collector bars
- Explaining limit switch controls
- Defining dynamic lowering
- Troubleshooting lowering direction
- Using knife switches
- Describing off-position dynamic braking
- Explaining time limit acceleration
- Tracing reversing-plugging control
Day 3
- Explaining condenser timing
- Using voltage drop acceleration
- Troubleshooting bridge control circuits
- Troubleshooting trolley control circuits
- Troubleshooting bridge/trolley circuits
- Review
- Exam
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