Cashco 31-B - Manual (Page 5)

IOM-31-B 5
upper di a phragm plate (13) with adhesive.
Rotate the upper plate and repeat this action
until the diaphragm (12) is fully re moved.
Discard used diaphragm (12). Any remaining
ad he sive on the upper di a phragm plate (13)
can be rubbed away by hand.
11. Examine diaphragm plate (13) for bending or
distortion. Re place if deformation is present.
12. Spread a thin layer of compatible adhesive
(DuPont 732 or equal) onto the fl at side
of the upper pressure plate (13), stay-
ing away from the edges approximately
1/2" (12 mm). Place a new di a phragm (12)
down onto a fl at work surface with the di a-
phragm’s fl ange edges up, forming a “bowl".
Carefully lift the upper diaphragm plate (13)
up, invert 180°, and begin to lower it into
the diaphragm (12) “bowl” so the side with
the adhesive will come in contact with the
diaphragm. Using the painted mark from
step 8 previous, align the mark on the upper
diaphragm plate with one of the bolt holes
in the outer bolt circle of the diaphragm. At
the same time, align the center bolt hole of
both parts as concentrically as able. Care-
fully lift the two adhered parts (12)(13) up
and invert 180°. Recheck the alignment of
the center holes as well as the location of the
painted match mark . Work out any “bubbles”
formed be tween the diaphragm (12) and the
upper di a phragm plate (13) using a fl at tool
if nec es sary. Once aligned, set adhered
parts (12)(13) back down to allow adhesive
approximately 30 minutes setting/drying time.
13. Place the adhered diaphragm (12) / upper
diaphragm plate (13) assembly back onto the
lower diaphragm plate (20) still resting in the
vise. Position/align the diaphragm (12) with
respect to the lower diaphragm plate (20) as
indicated in Figure 3; failure to align properly
may cause poor unit performance.
14. Set nylon bushing (15) into hole in the top
of the upper diaphragm plate (13). Place
washer (16) on top of nylon bush ing (15).
15. Insert stop post (19) thru center opening
of stacked parts (16, 15, 13, 12) and en-
gage threaded end of stop post into lower
diaphragm plate (20). Carefully tighten stop
post to ensure concentricity of stacked parts.
Tighten stop post to 18–20 in-# (2.0–2.3
N-M) torque. This com pletes di a phragm
sub-as sem bly (DSA); re move from vise.
Figure 3
16. Position the diaphragm sub-assembly (DSA)
over the lower case (3) slightly to wards the
right of center of the lower case with the
opening of the lower di a phragm plate (20)
oriented per pen dic u lar to the linkage lever
(21). Insert the linkage lever thru the open-
ing of the lower diaphragm plate. Align the
bolt holes of diaphragm (12) with the bolt
holes of the lower case (3).
17. Place range spring (17) over post (19), and
align properly by setting spring over washer
(16) and nylon bushing (15) so that the spring
rests on upper diaphragm plate (13).
18. Clean threads of upper case (4) “barrel”
thor ough ly using suitable solvent.
19. Set spring chamber (4) onto lower case (3)
align ing matchmarks of Step 3 previous.
20. Insert case screws (9) into fl ange bolt holes.
En gage nuts (10). Align and push nuts up
against the un der neath side of the lower
case (3) fl ange, ensuring that the “tips” of
the nuts are not improperly positioned due
to the small “lugs” on the lower case fl ange.
Hand-tighten all case screws and nuts.