should break?

A. Disconnect the forward end of the radius rod, suspend it from running
board, block the valve, provide for lubricating the piston and proceed.

12. Q. How proceed with a broken reach rod?

A. Remove the reach rod, block links on lower side to hold them in
running position for proper direction. Unless radius rod lifters can be
uncoupled, leave a little slack in the blocking.

13. Q. How can you tell without opening the steam chest if the valve
covers the port with Stephenson gear? With Walschaert gear?

A. Place the rocker shaft vertical with Stephenson gear. Place the
combination lever vertical with reverse lever in mid gear so the link
block is in the center of Walschaert link.

14. Q. What is the Baker-Pilliod valve gear?

A. It is an outside gear with an eccentric crank, similar to the
Walschaert gear, but without a reversing link. The motion is reversed by
means of a reversing yoke instead of a link; the cut-off is changed in
the same manner. It uses a combination lever connected with a union link
to its cross-head arm. In case of breakdown remove the broken parts the
same as described for Walschaert gear, blocking the reversing yoke, if
necessary, in the proper position.

15. Q. Is the Baker gear a direct or an indirect motion?