Cashco 8900 - Manual (Page 7)

7 IOM-8900 Series
2. With open end up, place lower pressure
spring buttons (32) (hole with large I.D.) over pallet
guides (30) coming to rest on pressure pallet.
3. Position travel stops (37) on top of pallet
guides (30) and thread adjusting screw (31) thru
stops and into top of pallet guides (30) hand tighten.
Make sure that adjusting screws (31) threads are
engaged fully into the pallet guides (30).
4. Rotate nuts (35) CW and wrench tighten
against travel stops (37).
5. Slide pressure springs (33) over adjusting
screws (31), make sure springs are seated in the
spring button retaining groove.
6. Place upper pressure spring buttons (34)
on springs (33), make sure springs are seated in the
spring button retaining groove.
7. Thread one jam nut (35) CW onto each
adjusting screw (31). Recalling the values recorded
for the compressed height of each spring per A.1.
previous; continue to rotate jam nuts CW using a star
pattern until the height from the top of the pressure
pallet (3) to the top of the upper spring button (34) is
equal to the recorded value for each spring.
8. Thread a second jam nut (35) onto each
adjusting screw (31) tighten two nuts against each
other.
SECTION V
V. INSPECTION / DIAPHRAGM REPLACEMENT for 8930 and 8940 Hinged - Relief Vents:
See page 14 for a listing of parts. For Model 8930 (Figure 3) disregard item numbers 5 - 8, 10 - 16, 18 - 24, 28,
40, 56, and 73 - 74. These parts are for vacuum service option for the Model 8940 and do not pertain to the
pressure only function of the 8930.
B. Diaphragm Replacment:
1. Remove hex nuts (27), lock washers (26),
and diaphragm retainer ring (4) from the pallet.
NOTE: Pressure set point will dictate the quantity
and stack orientation of diaphragm(s). Record
diaphragm’s stack orientation for re-assembly.
2. Remove diaphragm(s) (2). Clean the
pressure pallet (3), especially the pallet groove, and
inspect for nicks or scratches.
3. According to stack orientation of the
diaphragms B.1 previous, position new diaphragm(s)
(2) in the pallet (3) groove. Align holes in diaphragm
(2) bolt circle over the cap screws (49) in the pressure
pallet (3).
4. Position diaphragm retainer ring (4) over
cap screws (49). Install 1 lock washer (26) and 1 nut
(27) to each cap screw (49), tighten all nuts to 5 ft.
lbs.
5. Close the pressure pallet assembly. Return
to Section II for Installation.
To remove the vent from the tank nozzle, loosen
and remove the fl ange bolts and nuts from the tank
nozzle and fl ange seat (1). Attach lifting cables or
straps to the lifting lugs/eyebolts (39). Be sure to
utilize all lifting lugs in order to keep the unit stable
during lifting and transportion. Place the vent fl ange
(1) on a fl at work surface.
Model 8930 & 8940:
A. Inspection of Pressure Pallet Diaphragm:
1. Grasp handle (70), lift up to raise and open
the weighted pallet assembly.
2. Inspect the diaphragm(s) (2) on the
pressure pallet assembly for any signs of damage.
Damages may include but are not limited to tears,
crinkles/creases, and holes. If it is deemed that
the diaphragm need to be replaced, proceed with
following steps to replace. If the seating surface
(1) is damaged, the seat surface may need to be
relapped. If relapping the seating surface does not
create a suitable seating surface, a new fl ange seat
(1) is required. Contact your local representative for
assistance. Provide Serial Number, Product Code &
Set Point Pressure(s) to place an order for parts.