BC Air Brake Practice · Question
What is the maximum permissible free-play (pushrod stroke) for a manually adjusted slack adjuster on a fully applied service brake?
According to Canadian regulations, the pushrod stroke for an air brake chamber should not exceed 20 mm (3/4 inch) when the brakes are fully applied. Exceeding t
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Question: What is the maximum permissible free-play (pushrod stroke) for a manually adjusted slack adjuster on a fully applied service brake?
Answer options: ✅ 20 mm (3/4 inch)
- 25 mm (1 inch)
- 30 mm (1 1/4 inches)
- 38 mm (1 1/2 inches)
Correct answer: 20 mm (3/4 inch)
Explanation: According to Canadian regulations, the pushrod stroke for an air brake chamber should not exceed 20 mm (3/4 inch) when the brakes are fully applied. Exceeding this indicates excessive slack and incorrectly adjusted brakes.
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