Heavy Duty Equipment Technician Red Seal Exam Prep · Question
A hydraulic excavator's travel pedal requires excessive force to operate, and the machine drifts slightly when attempting to hold it stationary on an incline. The technician suspects an issue with the service brakes. Which component should be checked first?
Excessive pedal force and drifting when attempting to hold position points towards a problem in the hydraulic service brake system. The master cylinder is respo
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Question: A hydraulic excavator's travel pedal requires excessive force to operate, and the machine drifts slightly when attempting to hold it stationary on an incline. The technician suspects an issue with the service brakes. Which component should be checked first?
Answer options: ✅ The hydraulic brake master cylinder.
- The parking brake release valve.
- The swing brake accumulator.
- The boom hoist cylinder.
Correct answer: The hydraulic brake master cylinder.
Explanation: Excessive pedal force and drifting when attempting to hold position points towards a problem in the hydraulic service brake system. The master cylinder is responsible for converting pedal input into hydraulic pressure for the brakes. Issues with the parking brake, swing brake, or boom hoist would manifest differently.
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