"Let me look," Earl said.
---
He looked for two days. He unloaded Walter's tractor into the shed, beside Unit One, and he went through the hydraulic system from end to end. Walter's pump was fine. His lines were fine, mostly. The cylinders were sound. The problem was exactly what the dealership had said it was: the control assembly had failed internally, a cracked spool bore and a broken relief valve that had dumped pressure straight back to the reservoir.
Then he read Walter's serial plate, checked it against the notebooks, and walked out into the pasture with a flashlight and a creeper.
He came back an hour later with a name. Number Thirty-Eight. Same model family as Walter's tractor, built in the same three-year window, with the same revision of hydraulic control assembly. The tractor itself was a disaster, a burned-out engine and a cracked transmission case, but its hydraulic tag was legible and its control valve looked intact from the outside.
He pulled it that afternoon. Then he did what he had done with every part on Unit One. He did not accept it because it fit.
He disassembled the assembly on the bench, piece by piece, laying out each spool and spring and check ball and seal. He cleaned everything. He inspected every bore under the magnifying lamp for scoring and every spool for wear. He measured spool clearances with a set of gauges. He compared every spring against the specifications in the service manual. He replaced every seal and O-ring with new ones from his supplier two counties over. He replaced the relief valve spring, which had weakened slightly with age. Then he reassembled it all, slowly, checking torque values against the manual.
Then he tested it. He built a test stand on the bench with a spare pump driven by an electric motor, a pressure gauge, a set of hoses and a reservoir, and he ran fluid through the assembly at working pressure. He checked every port for leaks. He checked the relief setting. He worked each spool through its full range of motion again and again until the fluid warmed.
Only then did he bolt it into Walter's tractor.
---
Walter came to pick it up on a Thursday. Earl had the tractor parked outside the shed with the loader on, and a round bale sitting on the ground in front of it.
"Go ahead," Earl said.
Walter climbed up. He started the engine. He looked at Earl once, then reached for the hydraulic control and pulled it back.
The loader arms rose smoothly off the ground. Walter drove forward, speared the bale, lifted it chest-high, and held it there. Then he raised it higher, as high as it would go, and held it there too, and the arms did not drift and the bale did not drop. He lowered it, raised it again, curled the bucket, uncurled it. Then he set the bale down very gently on the gravel, shut off the engine, and sat on the seat without moving for a long moment.
When he climbed down, he did not say anything. He took out his checkbook, wrote a check, and handed it to Earl.
Earl looked at it. It was for several thousand dollars. More than he would have asked.