Cashco SCV-30 - Manual (Page 4)

IOM-SCV-30 4
NOTE: Observe the contours of the di a phragm
(3.2) to confi rm that it will fi t over the contour of
the plug head-end end (3.1).
6. Clean body (1) similar to plug/stem (3.1) of
Step 4. above. Place body (1) back into vise.
7. Place stem end of plug/stem (3.1) into a
soft jawed vise with the plug head-end (3.1)
ori ent ed upwards. DO NOT TOUCH PLUG-
HEAD END (3.1).
8. Open the small container of silicone seal-
ant/adhesive (3.3). Place seven “dabs” of
ad he sive (3.3) on the plug head-end (3.1)
at the locations indicated in Figure 3. DO
NOT ATTEMPT TO SPREAD THE DABS.
Place a new diaphragm (3.2) over the plug
head-end (3.1). Press down on the tip of the
diaphragm (3.2) to spread the sil i cone sealant
(3.3). Twist the diaphragm (3.2) back and
forth several times while ensuring at least one
com plete revolution of the di a phragm (3.2)
oc curs. Starting at the tip of the di a phragm
(3.2), press the diaphragm (3.2) against the
plug head-end (3.1) to re move any air pock ets.
9. Grasping the outer edge of the diaphragm
(3.2), lift off the diaphragm (3.2).
10. Examine the plug head-end (3.1) to ensure
that the adhesive (3.3) is evenly spread and
that all surfaces are covered. DO NOT TOUCH
ADHESIVE (3.3).
NOTE: If there are surfaces missing adhesive
(3.3), repeat the last half of Step 8. above,
and Steps 9. and 10.
11. Place diaphragm (3.2) back over the plug
head-end (3.1). Twist 1/4 revolution. Press
the diaphragm (3.2) against the plug head-
end (3.1) to remove any air pockets, starting
from the tip of the diaphragm (3.2) and moving
downwards.
12. Place plug/diaphragm sub-assembly (3) back
into the body (1) with the stem (3.1) oriented
upwards, and the plug head-end (3.1) resting
on the seat portion of the body (1). Place a
temporary 6# (3kg) weight (doughnut shaped)
over the end of the stem (3.1) so that it can
rest on the “shelf” of the plug (3.1), pressing
the diaphragm (3.2) against the plug (3.1) at
the seating surfaces. Leave this apparatus in
place for a 24 hour cure period. NOTE: The
silicone sealant/adhesive (3.3) cure period
can not be shortened through the use of heat;
minimum cure time is 24 hours.
5. Lightly roughen the inside surface of a new
plug/di a phragm (3.2), where the adhesive (3.3)
will be applied, using a “Scotch-Brite” (TM of
3M), or equal polishing pad. Rinse throughly
with warm water and allow to air dry.
4. Slide bonnet (2) up over end of plug/stem
(3.1) and set aside.
5. Place plug/stem end (3.1) into a soft-jawed
vise with plug head-end oriented upwards.
D. Trim Inspection and Replacement:
1. Inspect body (1), bonnet (2) and plug/dia-
phragm (3) for wear. If seating surfaces show
wear, perform the following re pairs:
2. Pull diaphragm (3.2) away from plug/stem
(3.1). Discard used diaphragm (3.2).
3. Using palm of hand, rub away any adhesive
(3.3) that remains “stuck” onto the plug (3.1).
4. Remove the plug/stem (3.1) and thoroughly
clean the area where adhesive is to be
reapplied (abraded surface) with a water
sol u ble solvent. Rinse thoroughly with warm
potable water. Allow to air dry.
Figure 3: Adhesive Placement
CAUTION
Owner’s cleaning solution must be com pat i ble with control
valve’s trim ma te ri als.
CAUTION
DO NOT TEAR DIAPHRAGM FABRIC.