The service platform gave them just enough room to work and no room to be careless.
Oliver laid out his tools beside the transfer housing. Beyond the platform’s edge, the hanging rail swayed a few inches at a time, its far end aimed past the next section of track. The counterweight chain ran through a toothed guide and disappeared into the housing. Three links had twisted against one another. A dark metal pin sat crooked across the guide teeth.
Nadia crouched beside him. “That’s the jam?”
“The pin is. The chain’s carrying the weight unevenly.” Oliver pushed a thin gauge between two links and withdrew it. “If I pull the pin now, the counterweight drops. If I force the chain through, it’ll tear the guide apart.”
“How much does the weight drop?”
“Far enough.”
She studied the platform’s machinery. A maintenance screw lift stood beneath the counterweight housing, its iron handle socket empty. A second socket had a handle still attached, worn smooth where generations of hands had turned it.
Oliver checked the lift’s frame and the bolts sunk into the platform. “We raise the weight until the chain goes slack. Then we can replace the pin and reseat the links.”
“And if the lift slips?”
“We get out of its way.”
Nadia gave him a look. “That’s a plan for the part after it goes wrong.”
“It’s the part people usually forget.”
She took the surviving handle. Oliver fitted his shoulder against the lift’s frame and watched the counterweight. The first turn made no visible difference. On the second, the screw groaned. The chain shivered, and the hanging rail swung out toward the gap.
“Stop,” Oliver said.
Nadia stopped with the handle halfway through its turn. The rail drifted back. A bolt at the lift’s base had risen slightly from its seat.
Oliver wedged a steel chock beneath the frame and tapped it in with a hammer. “Again. Slow.”
They worked in short turns. The lift rose a fraction at a time; the chain tightened, then slackened as the weight came off the jammed guide. Each time the rail moved, Oliver watched its far end. Nadia kept her grip on the handle and waited for his signal rather than pushing ahead.
When the pin loosened, Oliver felt it through the pry bar before he heard it. He set the bar aside and examined the gap between the chain’s joining plates. The pin was bent almost into a hook. Its head had been battered flat where it caught the guide teeth.
Next
With the rail aligned but its far joint untested, Oliver must decide how to prove it can bear Mercy’s weight without a coupling pin in reserve.
He reached into Mercy’s repair locker and took out the spare coupling pin. It was the same diameter, a little longer, and stamped with the engine’s service mark. Oliver kept it wrapped in oiled cloth for emergencies: a broken coupling, a lost pin on a steep grade, a train separated where there was no platform to wait on.
Nadia saw the mark. “That’s the one you keep for the carriage.”
“It’s the one I keep for getting the carriage back if we’re separated.”
They looked past the platform, toward the eastern fragment and the route they had come down. Mercy’s passenger carriage was elsewhere, supported on its own path. This old line had given the engine a way forward, but there was no promise the two halves of the train would meet again soon.
“We can still go on without it,” Nadia said.
“We can.” Oliver turned the pin in his hand. “It makes the next separation harder to recover from.”
She didn’t tell him the choice was easy. That helped.
Oliver slid the bent pin free. The chain shifted against the guide. The screw lift held, though the base bolt lifted another fraction.
“Nadia, keep the handle where it is. Don’t let it turn back.”
She braced both hands against the iron. “I have it.”
He fitted the spare pin through the chain plates. It caught halfway. Oliver adjusted the twisted links with the point of a wrench, trying to keep his fingers clear of the tensioned metal. The pin slid farther, then jammed again.
“Your sleeve,” Nadia said.
A loose strip of fabric had caught at the edge of the guide. Oliver pulled his arm back before the chain could take it. He cut the trapped cloth free with his pocket knife. The torn cuff hung open at his wrist.
“Hold the wrench here,” he said, offering it to Nadia. “Not the chain. The wrench.”
She placed it against the link and leaned into it. Oliver tapped the pin with the hammer. It passed through the plates and out the other side. He secured it with the cotter, then checked the fit twice before he looked up.
“Now we lower the weight a little. Let the chain take it.”
Nadia eased the handle backward. The screw lift gave a short, rough turn. The chain settled into the guide. The new pin held.
Oliver checked the links one by one. “Clear.”
They released the lift by degrees. The counterweight descended. The chain pulled through the guide, straightening as it went. A deep clank came from inside the housing; the transfer mechanism rotated, and the hanging rail swung inward.
Its near end entered the platform’s receiving cradle. A steel catch dropped into place with a hard, clean click.
Nadia let go of the handle. The transfer rail stopped moving.
Oliver walked the platform’s length, checking the catch and the bolts beneath it. He didn’t step onto the rail. The far joint was now level with the next track, but its surface carried a dusting of pale grit and an old warning plate. Someone had stamped the words by hand: ALIGNMENT ONLY. LOAD TEST REQUIRED.
Nadia read it over his shoulder. “It can’t be tested from here?”
“We can test the catch and the near section.” Oliver went back to the tool chest and picked up a heavy iron case. “We don’t put Mercy on it until we know the far joint will hold.”
They placed the case on a low maintenance trolley. Oliver eased it from the platform onto the aligned rail. The trolley rolled a short distance, its small wheels rattling over the join. The catch held. The rail didn’t dip.
He stopped the trolley well short of the far end.
The weight test had proved something. It had not proved enough.
Nadia came to stand beside him. “You used the pin.”
“I did.”
“You’ve been carrying it for a problem you couldn’t predict.”
“That’s what a spare is for.” He wiped the grease from his palm with a rag. “I’d rather lose the spare than the train.”
She looked at the open cuff at his wrist, then at the newly seated rail. “And if the carriage needs the pin?”
“Then I’ll have to find another way to bring it back.”
He heard how definite that sounded only after he said it. The old instinct in him had been to keep every route open, every burden accounted for, every failure anticipated. This choice left a hole in the inventory. He could not repair it by pretending otherwise.
Nadia rested one hand on the platform rail. She didn’t offer the core. She didn’t need to. “We have a route now.”
“We have an aligned rail.” Oliver looked at the warning plate. “The engine still has to earn the rest.”
The transfer catch remained locked. Beyond it, the next track led away beneath the eastern fragment, narrow and dark. Mercy waited behind them on the old iron line, its coupling socket empty of the pin Oliver had taken.
They had freed the mechanism. They had not yet proved it could carry them.