Cashco 8900 - Manual (Page 6)

6 IOM-8900 Series
3. Re-Orient the pressure pallet assembly (3)
with vacuum seat ring (8) face down - use 4” x 4”
blocks as support. DO NOT ALLOW DIAPHRAGM
(2) OR RETAINER RING (4) TO REST ON THE
BLOCKS.
4. Rotate cap screws (36) CCW to remove
weather hood (11). Remove screen (6). Around
the bolt circle of the weather collar (7) place match
“marks” to indicate the location of each weather
hood support (10).
5. Rotate each support (10) CCW and remove.
Rotate seat ring nuts (73) CCW to remove nuts,
lockwashers (74), weather collar (7), weather collar
(41) and fl ame screen (40).
6. Re-Orient the pressure pallet assembly (3)
with the seat ring (8) face up, again resting pressure
pallet on the blocks. Rotate cap screw (9) CCW and
remove seat ring (8) and seat ring gasket (5).
7. Clean sealing surfaces on seat ring (8) and
both sides of pressure pallet (3).
8. Install new seat ring gasket (5). Position
seat ring (8) on gasket (5), align holes and thread
cap screws (9) into pallet using a star pattern and
tighten to 15 ft. lbs.
9. Re-Orient the pressure pallet assembly (3)
with the seat ring (8) face down, again resting on the
blocks. Position fl ame screen (40), weather collar
gasket (41) and weather collar (7) over cap screws
(9). Ensure match marks are in alignment per G.1
and bolt holes.
10. Using the “marks” per G.4. previous, install
the weather hood supports (10) on the weather collar
and tighten to 15 ft-lbs. On remaining cap screws
install lock washers (74), nuts (73) and tighten to 15
ft-lbs.
11. Reposition the screen (6) around the
weather hood supports (10). Align holes in weather
hood (11) with holes in supports (10) and install cap
screws (36), torgue to 15 ft-lbs.
12. With open end up, install lower spring
button (14) into lower canister (13) and position both
through the weather hood (11).Ensure alignment of
holes between fl ame screen (40), lower canister
(13) and lower spring button (14).
13. From below the pressure pallet assembly
(3) insert three cap screws to secure fl ame screen to
lower canister and spring button - tighten to 10 ft-lbs.
14. From underside of pressure pallet assembly
slide vacuum pallet (18) assembly - threaded end of
stem (21) fi rst - up through the center hole of the
lower canister (13).
15. Install spring (16) over stem (21) and into
lower canister (13). Ensure that lower spring coil
rest inside the retainer groove of the lower spring
button (14).
16. Place upper spring button (14) on top of
vacuum spring (16). Make sure that top spring coil
rests inside the groove of the spring button.
17. Place one hand on the upper spring button
(14) and compress the spring (16) until the threads
of pallet stem (21) protrude thru upper spring button
(14). With other hand, thread one jam nut (25) on to
pallet stem (21).
NOTE: Check to ensure that as the pallet assembly
(18) is lifted upwards that the vacuum seat ring (8)
is centered and aligned with vacuum pallet (18)
assembly.
18. Continue to rotate jam nut (25) CW until
the height from the top of the pallet stem (21) to the
top of the upper spring button (14) is equal to the
value recorded per B.1. previous.
19. Thread a second jam nut (25) on pallet
stem (21). Secure tight against fi rst jam nut (25).
20. Place upper spring canister (15) over
vacuum spring (16), align bolt holes in canister
fl anges.
21. Insert cap screws (28) into fl ange bolt
holes and tighten snug - torque to 10 ft-lbs. NOTE:
DO NOT over- tighten cap screws.
H. Re-assemble Pallet to Flange Seat:
1. Lift pallet (3) sub-assembly up to a suffi cient
height to pass over tops of pallet guides (30). Lower
sub-assembly coming to rest on the fl ange seat (1).
NOTE: Check to ensure that as the pallet assembly
(3) is lowered, the fl ange seat (1) is centered and
aligned with pressure pallet (3) assembly.
WARNING
SPRING UNDER COMPRESSION. Exercise cau-
tion to avoid accidental spring release. Vacuum
spring (16) is now under compression and the ac-
cidental release of force may result in fl ying parts
that could cause personal injury.