The demonstration covered safe observation, basic electrical diagnosis, the difference between a symptom and a cause, and the need to verify repairs rather than assume success. Martha made June lead the section on the fuel-system fault. June used a simple training illustration rather than exposing students to a live working system, explaining how an unseen leak could interrupt supply and why a dry fitting was not always a sound fitting. She told the students about the day she noticed air returning after priming and about the moment Martha had almost dismissed it. Martha stood beside her and nodded when she described that mistake.
"You really told your boss she missed something?" a girl in the front asked.
June smiled. "I told her what I saw. That's what the job needed."
"Weren't you scared?"
"A little. But I was more scared the engine would never run if we kept looking in the wrong place."
Martha stepped forward. "And she was right. People who maintain equipment for a living need to hear uncomfortable observations, even from the youngest person in the room. Especially from the youngest person if they're the one watching the right thing."
Calvin stood at the edge of the audience, hands in his pockets. A year earlier he had made June's age and Martha's gender part of the joke. Now he listened while June explained how the joke had been defeated by evidence. When the students finished their questions, he walked toward the office without drawing attention to himself. Martha appreciated the absence of a speech. He had done the thing she had asked: listened.
After the demonstration, Arthur Bell found Martha near the service truck. "I remember when that machine was new," he said. "Thought it was the finest thing we'd ever seen. Then it got old and everybody stopped seeing what it could do."
"Old machines can still be useful," Martha answered. "As long as you don't pretend they're new."
Arthur smiled. "Seems to me that's a pretty good rule for people too."
Martha laughed, then glanced at June packing away the training materials. The apprentice was no longer simply following behind her with a light. She was answering questions, organizing records, and making decisions that customers trusted. Martha thought about the bank letter on her desk a year earlier and the doubts she had carried to the auction. She had wanted a way to survive financially. The combine had given her that opportunity, but the larger surprise had been watching another person grow into a trade as though she had finally been given room to stand.
They left the auction before noon. Neither needed to wait for the clock this year. Back at the shop, the early harvest reservations were lined up on the calendar, and the machine had a full maintenance log waiting for the next season. Henry Lawson was booked first. Clara Madsen had called twice to confirm her date. Samuel Price had recommended them to a neighbor whose small field would never fit comfortably into a large crew's schedule. There was enough work to be hopeful and enough uncertainty to remain careful. Martha found she preferred that combination to false confidence.