Leslie Controls CONTROL VALVES DLOS-2 & DDLOS-2 (150/300) - Manual (Page 9)

9
10.
Examine gasket. Replace seal if necessary
to obtain an air-tight seal.
11.
Clean all metal parts. Remove any rust, dirt
or sharp edges that might damage stem seal.
12.
Lubricate spring washer(s) (33 & 34), spring
adjustor (35) and actuator stem threads with
anti-seize compound.
REASSEMBLY
1.
55R & 85R – Place the new stem seal in
position and install the seal ring with the lip
upward. Tighten screws. Press stem seal
down until flush with spacer, install lower
diaphragm case and tighten nuts.
2.
When reassembling, place a block under the
actuator stem to hold the stem high enough
so that clearance between the stem seal bead
and the groove is not greater than 1/8 inch.
Line up the actuator stem in the center of the
opening in the lower diaphragm case so that
the stem seal bead will enter the groove in
the stem collar when the lock nut is
tightened.
3.
Place the stem collar over the actuator stem
with the groove upward followed by the
diaphragm and the diaphragm disc. Be sure
that the center hole in the diaphragm fits
properly over the raised lip of the collar.
4.
Install the lock nut and tighten. REMOVE
THE LOCK ROD.
5.
Install the upper diaphragm case and Hand
Operating Device (if fitted) to actuator and
tighten the nuts and bolts.
ALL ACTUATORS
Reset valve for proper travel and spring preload
as previously described, by compressing actuator
adjusting spring(s) sufficiently to move
diaphragm(s) up against actuator stop. Align
travel indicator plate and tighten screws. Plate
scale indicates rated valve travel.