Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A technician is diagnosing a heavy-duty transport truck that 'pulls' to the right under braking. The air pressure readings are balanced across all brake chambers. What is the most probable cause?
If the truck pulls to the right during braking, it means the left side brakes are applying more force, or the right side brakes are not applying enough. A stick
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Question: A technician is diagnosing a heavy-duty transport truck that 'pulls' to the right under braking. The air pressure readings are balanced across all brake chambers. What is the most probable cause?
Answer options: ✅ A sticky caliper slide pin on the right front wheel.
- A seized slack adjuster on the right rear wheel.
- An improperly adjusted pushrod on the left front brake chamber.
- A failed spring brake chamber on the left rear wheel.
Correct answer: A sticky caliper slide pin on the right front wheel.
Explanation: If the truck pulls to the right during braking, it means the left side brakes are applying more force, or the right side brakes are not applying enough. A sticky caliper slide pin on the right front wheel would prevent that brake from applying full force, leading to the left side doing more work and causing a pull to the right. The other options would likely cause a pull to the left or different braking symptoms.
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