Inspect Tire and Wheel Assembly for Air Loss, Repair Tire Using Internal Patch

Lesson Plan for

AUT 152-153 Maintenance and Light Repair Section B

Course HS Title: / Maintenance and Light Repair / Program:
KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
KCTCS Course No. / KCTCS Course Title
Introduction/Context / This lesson will instruct students on the proper methods of inspecting tire and wheel assemblies for air loss and how to repair a tire using an internal patch. Knowledge of these techniques and the skills required to correct problems associated with this task are necessary for a student to acquire if they wish to compete for high paying, high skilled jobs in an Automotive Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an automobile accident or create customer satisfaction issues.
Prepared By / School / Date:
Grade Level / No. Students / No.IEP's: / Lesson Length:
Task
Inspect tire and wheel assembly for air loss; perform necessary action. Repair tire using internal patch.
No. / Objective
1 / Given the proper tools, information, instructions and a tire wheel assembly, students will be able to inspect a wheel assembly for air loss and perform necessary action, including repairing a tire using an internal patch, and pass a test on the task with 100% accuracy by the end of the course.

Connections:

Skills Standards:
OH 001
OH 002
OH 003
OD 002
OD 003
OD 005
Common Core Technical Standards:
TD-OPS.2
TD-SYS.2
New Common Core State Standards:
RST 11-12 3
RST 11-12 2
N-Q-3
N-Q-1

INSTRUCTIONAL MATERIALS/TECHNOLOGY

Teacher Designed Materials and Other Handouts

Handouts developed from available text books covering instructions for checking tire and wheel for air loss. Suggest copying instructions from specific brand internal patch used at site to use as instructional guide. Safety instructions pertaining to tire changer (if it will be used).


Textbooks and Workbooks

Author / Title/ISBN No. / Edition / Publisher / Pages
Automotive Excellence 1& 2 / Glencoe / SS-513
Don Knowles / Automotive Suspension & Steering Systems (Todays Technician) 2nd Edition / Delmar / 109-113
James Halderman / Automotive Technology / Prentice Hall / 64-65


Equipment

Quantity / Item / Source
1 per group / Tire plug rasp / Various
1 per student / Tire pressure gauge / Various
1 per group / Tire patch roller / Various
1 / Tire changer (normal shop equipment) / Various
1 per student / Internal patches, required tire plug/patch glue / Various


Content/Presentation/Demonstration Outline

Students should be made aware of the dangers associated with tire changers and tire patching/plugging materials (glue, etc). All students need to have received safety instructions on available tire changers before using them.
Instruct students on proper method of checking air in tires and how to read the tire pressure specification on the side of a tire. Use a good-quality tire pressure gauge and push it against the tire valve stem after removing the cap. Compare the pressure reading with the specified tire pressure. The specified pressure is located on a placard attached to the driver's door, door post, or in the glove compartment.
Demonstrate to students how to check for air leaks around the circumference of the tread, and around the bead on both sides. To find a leak in a tire and wheel, inflate the tire to the pressure marked on the sidewall and then submerge the tire and wheel in a tank of water. An alternate method of leak detection is to sponge soapy water on the tire and wheel. Bubbles will appear wherever the leak is located in the tire or wheel. Mark the leak location in the tire or wheel rim with a crayon, and mark the tire at the valve stem location so the tire can be reinstalled in the same position on the wheel to maintain proper balance. A puncture is the most common cause of a tire leak, and many punctures can be repaired satisfactorily. Do not attempt to repair punctures over 1/4 inch in diameter.
Instruct students as to repairable part of tire (sidewalls generally considered not repairable). Punctures in the sidewalls or on the tire shoulders should not be repaired. The repairable area in belted, bias-ply tires is approximately the width of the belts (tread). The belts in radial tires are wider than those in bias-ply tires. The repairable area in radial tires is also the width of the belts. Since compact spare tires have thin treads, do not attempt to repair these tires.
Repair Procedure: Using a small drill and bit, puncture tire (previously removed from rim) in repairable location. Insert rasp into hole and file to remove burrs from steel belts. Using buffer, rough up area inside tire surrounding hole. Apply tire glue to area inside tire around hole, slightly larger than patch, and to patch. Allow glue to get tacky, install patch, using roller, push the patch securely into the tire. Remount tire on rim. Inflate to specified air pressure. Check for leaks by reapplying soap/water solution.
Instruct students that a wheel rim leak may be repaired if the leak is not caused by excessive rust on a steel rim, and the rim is in satisfactory condition. Inform students to follow these steps for wheel rim leak repair. Use #80-grit sandpaper to thoroughly clean the area around the leak on the tire side of the rim. Use a shop towel to remove any grit from the leak area. Be sure the wheel rim is at room temperature, and apply a heavy coating of silicone rubber sealer over the leak area. Spread the sealer over the entire sanded area with a putty knife. Allow the sealer to cure for six hours before remounting the tire.


Applications/Practice

1 / Students can practice this task by mastering the use of the tire changer, inflating tires to specification, and drilling holes in tread and checking for leaks using method described. Once leaks are located, they should practice removing the tire and applying an internal patch and remounting the tire. They may also be required to locate and repair a very small hole in a tire created, without being witnessed, by the instructor.


Evaluation and feedback Prior to Testing or Lab Work

1 / Objective 1. / Formative assessment / Instructor will observe students as they practice the procedure to assure correct procedure and safety practices are being followed. A checklist will be utilized to chart student progress on the task. Questioning techniques will be utilized as necessary to demonstrate student comprehension / depth of knowledge. 2/ Adaptations and/or accommodations for special needs students will be added if required.


STUDENT ASSESSMENT:(Assess student progress with performance criteria.)

1 / Objective 1 / Summative assessment / written test questions on stated objective / depth of knowledge 2/ adaptation and / or accommodations for special needs students will be added if required
IMPACT--Reflection/Analysis of Teaching and Learning: (How did students progress in relation to the state objectives? Was the instruction successful? Analyze samples of student work, particularly that which is unsatisfactory, for the purpose of planning further instruction.)
REFINEMENT--Lesson Extension and Follow-up: (To be filled in as the lesson is modified during initial planning and/or during the teaching learning process.)