Identify tire wear patterns, check tread depth and pressure; determine needed action.

Lesson Plan for

DIT 160-161

Suspension and Steering (Diesel-Medium/Heavy Duty Truck)

Course HS Title: / Suspension and Steering (Medium/Heavy Duty Truck) / Program:
KCTCS Courses included in HS Title: (Lesson is prepared for course highlighted.)
KCTCS Course No. / KCTCS Course Title
DIT 160-161 / Suspension and Steering (Diesel-Medium/Heavy Duty Truck)
Introduction/Context / This lesson will instruct the student on how to identify tire wear patterns, check tread depth and pressure, and determine needed action. 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 a Diesel Repair Facility. Entry level technicians need to be able to perform this task to 100% accuracy. Incorrectly performing this task can lead to an accident or create customer satisfaction issues.
Prepared By / School / Date:
Grade Level / No. Students / No.IEP's: / Lesson Length:
Identify tire wear patterns, check tread depth and pressure; determine needed action.
Given the proper tools and instruction, the student will be able to identify tire wear patterns, check tread depth and pressure, determine needed action, and pass a written test covering the task with 100% accuracy.


Skills Standards:
OH 001
OH 002
OH 003
OD 002
OD 003
OD 005
Common Core Technical Standards:
New Common Core State Standards:
RST 11-12 3


Teacher Designed Materials and Other Handouts

Textbooks and Workbooks

Author / Title/ISBN No. / Edition / Publisher / Pages
Various / Suspension and Steering ASE Test Prep T5 / Fifth / Delmar / 37-38


Quantity / Item / Source


Site / Author / URL

Content/Presentation/Demonstration Outline

Teach students that to determine if repairs are needed due to premature tire wear/damage, the technician must first decide if the wear/damage was a result of external actors or vehicle component issues.
Instruct them that irregular tread wear is generally a result of under/over tire inflation, component wear or alignment, and/or tire imbalance. To pinpoint the cause(s) of uneven, premature, feathering/cupping wear patterns, or internal/external damage, Tell students that a visual inspection of the vehicle suspension/steering components should be performed.
Next, tell them to determine if air pressure corresponds to proper the/wheel, suspension type, and load rating. Then have them determine load type (weight and center of gravity) and load placement on the vehicle. Explain that this may lead to bent/ broken frame and cross members, resulting in unstable/incorrect alignment.
Instruct students that inside or outside edge tire wear may be contributed to improper camber angle adjustment. Featheredge wear may be contributed to improper toe settings. Cupping around the inside edge of the tire may indicate worn shocks or worn shackle bushings. Let them know that underinflated tires will wear both edges and not the center of the tire, and that over-inflation wears the center of the tire tread and not the edges.
Tell students to determine if trailer load is a factor in alignment conditions. Inform them to return all components to manufacturer’s specifications. Perform alignment measurements and set adjustments to manufacturer’s specifications.


1 / Refer to content

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 / 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 / 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.)