The brake pump was mounted above Cage Seven’s upper landing, behind a panel someone had painted to match the wall. Iven found it because Tavin knew exactly which panel to kick.
“There’s a latch,” Iven said.
“There is now.”
The latch had indeed come loose. Tavin lifted the panel off its hinges and leaned it against the wall. Behind it, a compact pump drove oil through a narrow line toward the lift brake. A pressure gauge above the pump showed a needle hovering in a red-marked section of its face.
“That’s not where it belongs,” Tavin said.
“Your talent for machinery continues to amaze me.”
“It’s written on the gauge.”
The pump was running, but the oil moved unevenly through the inspection window. Each stroke of the piston produced a brief surge, followed by a pause. Iven checked the intake first. The reservoir had enough oil. Its filter was dirty but not blocked. When he placed his palm against the cylinder, he felt a small knock at the end of each stroke.
He waited for three cycles. The knock was not timed with the lift’s movement. It belonged to the pump itself.
“Stop it,” he said.
Tavin reached for the control lever. Iven caught his wrist.
“Not yet. I need to know what happens to the brake when we do.”
Tavin looked at him. “It stops pumping.”
“Yes. Which part of the brake depends on it?”
A maintenance worker at the landing had the answer. Her name was Rell, and she was sitting on a crate with a bandage around two fingers. She had been waiting for someone to approve a replacement part since before the cage reopened.
“Pump pressure releases the auxiliary brake,” she said. “If it drops, the brake grips the rail. It won’t make the cage fall. It might stop it between landings.”
“Can we isolate it at a landing?”
“There’s a valve on the line. If it hasn’t seized.”
“Comforting.”
Rell climbed onto the platform and showed him the valve. Its handle turned with a little resistance. They brought the cage to the upper landing, secured it with a separate pin, and closed the valve. Only then did Tavin stop the pump.
The knock ceased. The quiet seemed larger than the small machine had earned.
Rell touched the gauge. “Needle’s falling.”
“That’s expected,” Iven said. “The line is isolated.”
“I’m allowed to observe things.”
“Please do. You’re the only one here who knows which part bites.”
She gave him a skeptical look but stayed beside the line while he opened the pump casing. The first bolt had been overtightened. The second came out with no resistance at all. Someone had worked on this pump recently, and whoever it was had a complicated relationship with the idea of even pressure.
Inside, oil coated the cylinder wall. The piston moved when Iven turned the drive by hand, but it rocked slightly near the end of its travel. He lifted the connecting pin and found a narrow crack in the piston head. It ran from the edge toward the center, where a retaining screw held the seal.
“There’s your knock,” he said.
Tavin leaned closer. “Can it be mended?”
“Maybe. It depends whether the crack reaches the screw hole.”
“Does it?”
“I haven’t finished looking.”
The head had to come out. Iven caught the remaining oil in a shallow tray while Rell disconnected the line. He wiped the piston clean and held it under the landing lamp. The crack stopped short of the screw hole, but the surface around it had worn unevenly. A simple patch would catch against the cylinder wall and fail in a few strokes.
“We need another head,” he said.
Tavin swore softly. “The stores board has to approve one.”
“Do they have one?”
“They’ll tell us after we ask.”
Rell held out her bandaged hand. “I asked yesterday.”
“What did they say?”
“They told me to stop working with an injured hand.”
“Sound advice,” Sera said from the stairway.
She had come to inspect the patients waiting for the cage, and now stood with her case under one arm. Rell turned her hand over, showing the bandage.
“I caught it on the panel,” she said. “I didn’t fall into the pump.”
“I’ll check it after you’ve stopped using it.”
“Everyone wants me to stop doing something.”
“It’s a popular treatment.”
Iven wrapped the piston head in cloth and carried it down to the stores board with Rell. The office was a narrow room with a counter, three shelves, and a window that opened onto a yard of stacked crates. A clerk sat behind the counter, drawing careful lines through a ledger.
“We need a brake-pump piston head,” Rell said.
The clerk did not look up. “Work slip?”
She handed it over. He read it, then took a form from beneath the counter and began copying the number into a different column.
“Do you have the part?” Iven asked.
“We’ll find out.”
“Can we find out before you copy the number a third time?”
The clerk looked at him over the top of the form. “If I don’t copy it, the person in the yard won’t know what you’re authorized to receive.”
“Is the form going to the yard?”
“Yes.”
“Then carry on.”
The clerk finished the number, opened the window, and called to a worker in the yard. The worker went behind a stack of crates and returned with a small wooden box. Inside was a piston head of the correct diameter and the wrong depth.
“It won’t fit,” Iven said.
“It’s listed for the model.”
“The model changed its casing six years ago,” Rell said. “That one is for the old cylinder.”
The clerk consulted the ledger. “The ledger says it’s for the model.”
Iven placed the damaged head beside the replacement. The difference was plain. The new one stood nearly a finger’s width taller.
“Can you alter it?” the clerk asked.
“Maybe. Will you authorize that?”
The clerk looked at the form again, as if hoping it would volunteer an answer. “If you sign that you altered it.”
Iven felt the old reflex to inspect every word before putting his name to anything. He took the form and read it. The line described a modification to a supplied part, with the reason and the person responsible. It did not claim the part had arrived suitable. He wrote down the difference in depth, signed, and pushed it back.
Rell watched him. “You don’t have to be offended by the paper.”
“I’m not. I just like knowing what it says.”
“That’s unusual in this office,” the clerk said. He gave them the box.
They took the head to Neri’s yard, where Jem had a small cutting table and a file fine enough to finish the edge. Neri was arguing with a supplier over timber lengths. She acknowledged Iven with a raised finger that meant wait, then continued the argument until the supplier agreed to measure the boards again.
“He’ll say they’re shorter because he cut them to fit,” she told Iven afterward. “I’ll say we paid for the full lengths. We’ll have the same discussion next week.”
“That’s how you know you have a relationship.”
“You’re welcome to take my place.”
He showed her the piston head. She checked the material and ran a fingernail over its machined face. “Don’t take it all from the front. You’ll leave the seal recess too shallow.”
“I was going to split the cut.”
“I believe you.”
He did not believe that she believed him, but she gave him the cutting table without charging for the privilege. Rell held the piece steady while Iven marked the depth. He removed a thin section from the back, then filed the front face until the measurements matched the old head. The work took longer than either of them wanted. When he was done, the new head slid into a spare sleeve with a close, even fit.
Rell turned it over in her hands. “If we’d had this yesterday, I wouldn’t have cut myself on that panel.”
“You might have found another panel.”
“There’s no shortage.”
Back at the landing, they cleaned the cylinder and replaced the worn seal with a fresh ring from the stores box. Iven fitted the new head to the connecting rod, checked the retaining screw, and turned the drive slowly by hand. The piston moved without rocking. It reached the end of its stroke and returned.
Rell watched the inspection window. “No knock.”
“Not under load yet.”
They refilled the pump and opened a small test line into the tray. When Tavin restarted the motor, the piston began to cycle. Oil moved in steady pulses. Iven watched the gauge rise out of the red section and settle just below the middle of its scale.
A second sensation settled beneath the graft in his left arm. It was different from the brace. The plate spread force; the piston concentrated it along a straight path. He felt the pattern as a movement with a beginning, an end, and a solid surface to push against.
He shut off the test line. “Again.”
Tavin frowned. “It works.”
“I want to see it after we stop and start.”
They repeated the test. The gauge recovered each time. Iven isolated the line, stopped the pump, and waited for the pressure to fall before touching the casing.
Rell studied his arm. “That one gave you something?”
“A push.”
“What kind?”
“I haven’t tried it yet.”
She went to the stack of packing material and brought back a narrow board. “Try it on this. If you break my hand instead, the doctor will make me stop working again.”
They set the board against a sandbag with no one behind it. Iven seated the new pattern, keeping the brace and winch available. He held his left hand near the board and released a small, straight impulse.
The board jumped against the sandbag. It did not break. The bag moved a few inches across the floor.
Rell’s eyebrows rose. “That would have moved the panel.”
“It would have moved it into your face,” Sera said.
Rell considered. “Then the board was a better choice.”
Iven tried again from a different angle. The force went where his hand pointed, not where he hoped it would go. When he angled his wrist carelessly, the board skidded sideways. He corrected the alignment and pushed the sandbag back toward its original position.
His arm warmed. He stopped before the warmth became a tremor.
“That’s enough for today,” Sera said.
“I agree,” he replied.
Tavin stared at him. “You didn’t argue.”
“I’ve just learned to push things. I’m saving the argument for when it will be useful.”
They reconnected the pump to the brake line and brought the cage through another test. This time the auxiliary brake released cleanly. The cage rose, stopped, and settled at the landing without a sudden jerk. Rell checked the gauge herself and recorded its reading on the work slip.
When Sera finally looked at her hand, Rell’s bandage came off to reveal two shallow cuts and a small swelling. Sera cleaned them, applied fresh dressing, and told her not to grip a wrench with that hand for the rest of the day.
“I can still write,” Rell said.
“Then you’ll have something to do while other people grip the wrenches.”
Rell wrote a note on the back of the slip and handed it to Iven. It contained the stores part number, the alteration they had made, and the pump’s test reading. He folded it into his coat.
“Why give this to me?”
“Because if it breaks, someone will ask who touched it. And because if it doesn’t break, I want them to know the part in the ledger was wrong.”
He looked at her. “You could take it to the board.”
“I will. You should keep a copy.”
That evening the two patients came down in Cage Seven. One had a splinted leg; the other carried a cloth bundle and insisted on stepping out without assistance. Tavin offered his arm anyway, and the passenger accepted it at the last moment.
Iven watched the cage return upward. The drive wheel moved smoothly. The brake gauge held steady. Neither machine cared who had argued over the paperwork, but the people riding between landings cared a great deal that the parts had been made to fit.
Neri joined him at the rail. “Rell says the pump is yours now.”
“That’s generous. Does it come with the wall?”
“Only the broken panel.” She looked toward the cage. “Krail’s office sent a man to ask why his crew’s work was taken apart.”
“What did you tell him?”
“That it was falling apart without our help.”
“And?”
“He said the replacement plate wasn’t in his contract.”
“Neither were the passengers under the cage.”
Neri rested her elbows on the rail. “He wants the old plate.”
“Tavin wrapped it up.”
“I know. I told the man he could inspect it here, with us present.”
“Did he?”
“He said he’d come back.”
Below them, the cage’s chain moved through the drive. The repaired parts had solved today’s problem. The person who had installed the misaligned housing was another matter, and Iven doubted he would be as easy to open with a wrench.