In the slave piston clearance procedure, which technician is correct?

• A. Technician A
• B. Technician B
• C. Both
• D. Neither

Answer: (A)

The essential idea is that slave piston clearance must be measured with the exact method and under the conditions specified in the procedure, because the gap between the piston and bore directly affects movement, sealing, and reliability. The correct technician is the one who follows the official steps precisely: depressurize the system, install the seal, and use the proper clearance gauge or feeler tool to measure the gap at the specified location and under the prescribed preload or seating condition, then confirm the reading falls within the specified tolerance. This ensures the piston moves freely without sticking but also seats correctly to seal, preventing leaks. If a measurement is taken with the wrong tool, at the wrong location, or under the wrong state (for example, with pressure applied or at an improper temperature), the result won’t reflect true clearance, which is why such deviations would indicate an incorrect approach.