She started with the tractors themselves. Each of the sixty got a permanent record: serial number, model, production year, engine code, hydraulic identification, transmission type, the condition of every major system when it arrived, and a running list of every part removed from it. She went through the plywood charts and every page of the auction notebook and every relevant page of the old notebooks from the attic, and she typed it all in.
Then she built the part records. Every component that came off a donor tractor got a tag with a unique number, printed on durable labels from a machine she ordered online. The tag linked to a record that showed the source tractor, the part's exact generation and revision, what internal parts had been inspected, what had been replaced and with what, and every test it had undergone. When a part was sold, the record added the customer's name, the date, the machine it was going into, and that machine's serial number if it had one.
"And if a customer's plate is missing," Megan said, "like Carl's was?"
"Then we don't guess," Earl said. "We go out and look at the machine. Check the pump, check the other components, find the build features that tell you the year. Or we open up their old part and compare the insides. We don't sell them anything until we know."
Megan typed that in as a rule. She called the document *How We Do Things*, and it grew to eleven pages by the end of the month, every line of it something Earl had said out loud at the kitchen table.
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The testing changed too.
Earl rebuilt the test stand in the shed into something sturdier, with a bigger electric motor, a heated reservoir, and gauges for pressure and temperature that he could read from across the bench. For hydraulic assemblies, the test was no longer twenty minutes at pressure. It was a pressure check, then a sustained run at working pressure with the fluid brought up to operating temperature and held there, then a sustained load cycle that worked every spool through its range again and again, the way a farmer would in a long day in the field. Every reading went onto a test sheet. Every test sheet went into the part's record.
For engines, he built a test procedure that included compression, oil pressure hot and cold, coolant temperature under load, and a long run on a dynamometer he bought used from a closing truck shop. For transmissions, he ran them on a stand under load and checked temperatures and listened for noise. For rebuilt tractors, he put every one through a full day of field work at the far end of the pasture before it was allowed to leave.
It was slower. Much slower. Some weeks they sold half of what they could have sold.
And customers began driving farther.
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"I don't understand it," Ray said one evening in midsummer, looking at the numbers on Megan's laptop. "We're slower. We're more expensive than some guys selling salvage parts out of their barns. And we've got more customers than ever."
Megan pulled up a record and turned the screen toward him. It was the page for a hydraulic pump sold the week before to a dairy farmer three counties away. Source tractor. Revision. Every replaced seal. Four pages of test results.
"People can buy a used part anywhere," she said. "There's salvage yards. There's online listings. There's guys with barns full of junk. But when they buy those parts, they're guessing. They're hoping it's the right one. They're hoping it's good. And if it's wrong, they lose a week, or a season."
She tapped the screen.