e at the point
of closing of the pawls when they are "in," securely locking the
check-nut as each valve is set. Repeat this operation on the other side
of the machine and we are ready to adjust the governor-rods. (Valves
cannot be set on both sides of the machine at the same time, as the
pawls will not be in the same relative position, due to the angularity
of the drive-rods.)

[Illustration: FIG. 22]

Next, with the turbine running, and the synchronizing spring in
mid-position, adjust the governor-rods so that the turbine will run at
the normal speed of 900 revolutions per minute when working on the fifth
valve, and carrying full load. The governor-rods for the other side of
the turbine (controlling valves Nos. 6 to 10) should be so adjusted that
the speed change between the fifth and sixth valves will not be more
than three or four revolutions per minute.

The valves of these turbines are all set during the shop test and the
rods trammed with an 8-inch tram. Governors are adjusted for a speed
range of 2 per cent. between no load and full load (1500 kilowatt), or 4
per cent. between the mean speeds of the first and tenth valves (no load
to full overload capacity).

The rods which connect the governor with the valve-gear have ordinary
brass ends or heads and are adjusted by right-and-left threads and
secured by lock-nuts. They are free fits on the pins which pass through
the heads, and no friction is likely to occur which will interfere with
the regulation, but too close work on the shield-plate bushings, or a
slight warping of the steam chest, will often produce friction which
will seriously impair the regulation. If it is noticed that the
shield-plate shaft has any tendency to oscillate in unison with the
rock-shaft which carries the pawls, it is a sure indication that the
shield-plates are not as free as they should be, and should be attended
to. The governor-rod should be disconnected, the pawls thrown out and
the pawl strings hooked over the ends.

The plates should then be rocked up and down by hand and the friction at
different points noted. The horizontal rod at the back of the valve-gear
may be loosened and the amount of end play of each individual
shield-plate noticed and compared with the bushings on the horizontal
rod at the back which binds the shield-plates together. If the plates
separately are found to be perfectly free they may be each one pushed
hard over to the right or left and wedged; then eac