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Question

Difficulty: MediumBrake System Components Inspection

If an automatic slack adjuster exceeds legal pushrod stroke limits during an inspection, the driver should manually adjust it to restore proper travel before operating the vehicle.

Answer: Answer

Answer

False (Automatic slack adjusters must not be routinely manually adjusted when out of adjustment).
The statement is false because commercial drivers must never routinely manually adjust an automatic slack adjuster that has exceeded pushrod stroke limits. Doing so masks defective adjuster components, worn camshafts/bushings, or bad brake chamber return springs, leading to imminent brake failure.

Step-by-Step Solution

1
Identify the foundation brake component and the observed defect condition.
The component is an automatic slack adjuster exhibiting excessive pushrod travel beyond legal operating thresholds.
Accurate component classification is necessary to apply the appropriate regulatory inspection protocol.
2
Evaluate the regulatory and mechanical protocol regarding manual adjustment of automatic slack adjusters.
Automatic slack adjusters are self-adjusting systems; manual adjustment creates a dangerous false sense of security and merely masks serious mechanical defects.
Federal commercial vehicle standards state that manual adjustment should only occur during initial installation or emergency towing procedures.
3
Determine the correct course of action and evaluate the statement truth value.
The vehicle must be diagnosed and repaired by a qualified mechanic rather than manually adjusted by the driver, making the statement false.
An out-of-adjustment automatic slack adjuster represents an out-of-service defect that requires root-cause component correction.

Key Concept

Automatic Slack Adjuster Inspection and Adjustment Restrictions
Estimated Time:45s
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Topics

Brake System Components Inspection

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