the combination lever, even if not broken, secure the
valve in its central position, loosen cylinder head to provide for
lubrication, leave up main rod and proceed on one side. If valve was
blocked to open rear port slightly, this would provide for lubrication
and the cylinder head need not be loosened.

10. Q. If the radius rod on Walschaert gear is disabled, what should be
done?

A. If broken in front of the link block, take off the broken part by
disconnecting from combination lever, take down eccentric rod, fasten
valve to cover ports and proceed on one side. If broken back of the
link block, block the link block in the desired position and proceed
with both sides.

11. Q. What would you disconnect with a Walschaert gear if a valve yoke
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?

A. It is direct, going ahead for an inside admission and indirect
backing up, and just the opposite for the outside admission type.

16. Q. What parts of the Baker gear take the place of the link which is
used by the Stephenson or Walschaert motion?

A. The radius bars and reverse yoke.

17. Q. What relation to the main pin is the eccentric crank set to?

A. The eccentric crank always follows the main pin.

18. Q. Sh