Leslie Controls F-1240LDW Constantemp Double Wall Low pressure steam-water Heater - Manual (Page 8)

handling parts so as not to damage critical
surfaces. Replace any badly worn or damaged
surfaces.
ACTUATOR ASSEMBLY
IMPORTANT: Lubricate all O-rings with Silicon
Grease.
1.
Place O-ring (8) in the top of yoke (36). Position
and attach lower diaphragm case (6) to the yoke.
(See Fig. 3) Fasten case to the yoke with cap
screws (7) sequentially from each other until tight
(21 ft-lb).
2. Install O-ring (37) in temperature adjusting sleeve
(33) grooves. Insert guide energizer (35) (rubber)
and valve plug guide (34) (Teflon) into groove in
bore of adjusting sleeve (33). Chamfer on guide
to face out, ends should butt against the two
Groove-pins. (See Fig. 4 and Fig. 6)
3. Insert temperature adjusting sleeve assembly (33)
into yoke (36) with Teflon guide (34) facing out
and hole in side of sleeve lining up with yoke
window.
TOP VIEW SHOWING POSITION OF NOTCHES TO
VALVE BODY, ALSO TUBING AND FITTING TO
COLD WATER INLET
20
28
30
Top View Showing Position of Notches To Valve
Body, Also Tubing and Fitting to Cold Water
Inlet
Figure 3
VALVE PLUG ASSEMBLY
1.
Fasten seal plate assembly (21) to valve plug (38)
with screws (17) and lock washers(18)(7 ft-lb).
2. Place a stem collar washer (31), Teflon thrust
washer (32), and a second stem collar washer (31)
in this order over upper stem (1) making sure
parts shoulder on step of upper stem. Insert
Spirolox retaining ring (9) into upper stem (1)
groove.
3. Insert upper stem (1) through small hole in valve
plug (38) so that stem collar (31) will rest on the
smaller end of valve plug.
4. Place bearing assembly, which consists of
washing (19), thrust washer (40) and washer (19)
over upper stem (1) into large bore of valve plug
(38) so that it rests on bottom of bore, and follow
with spring seat washer (19) and yield spring
(41). Hold upper stem (1) at extreme upper end of
stem with a wrench.
5. Tighten screw (22)(10 ft-lb) making sure that
screw shoulders on lower section of upper stem.
Apply a light coating of Silicon Grease to the
surface of the valve plug.
NOTE: If a complete dismantling of control valve is
necessary, it is recommended that valve be
removed from Heater and work performed on
a work bench..