CLOSED, excessive leakage is indicated. In such
case you will have to regrind the valve using the
1. Disconnect the valve from the piping.
2. Remove the packing nut and the packing.
3. Disconnect the valve stem and remove the
locknut from the thermostatic stem.
4. Remove the thermostatic control unit
from the valve.
5. Clean the valve stem until it is smooth.
If necessary, polish it with fine emery cloth.
6. Grind the valve seats until a perfect seal
is obtained; then remove all grinding compound
from the valve and the seats.
7. Reassemble the valve and the control unit.
8. Repack the stuffing box and lubricate it
with engine oil.
Figure 3-9.Bulb installation.
ENGINEMAN 1 & C
9. Secure the packing gland nut finger tight.
10. Insert the bulb into the ships piping in
either a horizontal or vertical position, as shown
in views A and B of figure 3-9. When the bulb
is installed in the vertical position, the nut must
be at the top; when it is installed in the horizon-
tal position, the arrow on the indicator disk must
point upward. NEVER INSTALL THE BULB
WITH THE NUT AT THE BOTTOM (as shown
in view C of figure 3-9) because in this position
the liquid would be below the end of the internal
capillary tube and would have little or no effect
on the bellows of the temperature regulator valve.
11. Adjust the regulator.
A closeup of the adjusting and indicating
features of the temperature regulator is shown in
figure 3-10. The procedure for adjusting a
temperature regulator is as follows: Rotate the
manual crank pin until the indicator pointer is in
Figure 3-10.Scale and Indicator plates of temperature