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5637 STEAM
LOCOMOTIVE GROUP

 
 

STAYS & INSPECTIONS

 
                 
 


Crown Stays

The replacement of the 126 crown stays was a long and arduous task. The stays are steel bars about three feet long, an inch and a quarter inch thick and threaded at both ends. The old stays had to be carefully removed, the original threaded holes cleaned up, reamed to size and re-threaded to a slightly larger size. The new stays were then screwed into place, fitted with nuts & washers and beaded over to seal against any leaks. This was not a job for the faint hearted as some of the operations worked out at 252 work activities.


Photo: R.Bellchambers
Chris, Alex and Dick tap holes for the new crown stays.

Inspections

The pitting found on the internal boiler plates was rectified by welding. At pre-determined stages and once all the repairs to the boiler were complete, the Boiler Inspector carried out inspections to ensure the work had been done to the highest standard. Once he was satisfied with the repairs, work could then commence on the re-assembly of the boiler. In went the riveted front tube plate, large and small tubes, longitudinal stays, smoke box, safety valves, valves and fittings of all descriptions, vacuum ejector and blower. Finally the big day arrived when the boiler was hydraulically tested to 300psi followed by a successful team test to 200psi, the locomotives normal operating pressure.

 
                             
         

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