87. Q. What should be done when there is a loose or lost cylinder key?
A. If the cylinder key is loose, it should be tightened up; if lost, something should be substituted. In case nothing solid can be found to take the place of the key, the engine should be run in light to avoid further damage.
88. Q. What should be done if a safety valve spring or stud breaks?
A. The steam pressure should be reduced. With broken spring, screw the parts down solid or clamp the stem down. This can be done by laying a piece of scantling across the top of the valve, fastening each end to the hand rail on opposite sides of the engine in case of broken stud. Would then raise steam pressure and proceed. Care should be taken to see that the other safety valves relieve the steam pressure properly.
89. Q. How can an engine be brought in with a broken front end or stack?
A. By boarding up the front end to make it as near air tight as possible and using a barrel or a petticoat pipe in place of the stack, wiring it fast to the smoke-arch. Where a portion of the stack is inside the smoke-box the engine might steam without the barrel or petticoat pipe.
90. Q. What should be done if the frame is broken between the main driver and cylinder?
A. Either give up the train and come in light, or disconnect the engine on that side and come in with reduced tonnage, depending on how badly the engine pounds when working steam.
91. Q. If the frame is broken back of the main driver?
A. Do not disconnect and do not try to pull a heavy train; it is safer to come in with light tonnage.