Cashco 1000 LP - Manual (Page 4)

IOM-1000LP-Basic 4
Diaphragm sub-assembly consists of items (10), (11),
(12), (13), (15), (16) and (20). (Metal diaphragm de-
sign).
4. Regulators originally supplied as “oxygen
cleaned” (Option-55 ) are assembled using
special gasket sealant, Fluorolube GR-362
1 , or equivalent. Cashco, Inc. rec om mends
following factory cleaning spec ifi cation #S-
1134, or equiv a lent. Con tact factory for
details.
B. Diaphragm Replacement:
1. Securely install the body (1) in a vise with
the spring chamber (2) directed up wards.
2. Remove closing cap (31) if provided. Relax
range spring (27) by turning adjusting screw
(6) CCW until removed from spring chamber
(2).
3. Paint or embed a match mark between body
casting (1) and spring chamber casting (2)
along fl anged area.
4. Remove all diaphragm nuts (9) and bolts (8).
Remove nameplate (28).
5. Remove spring chamber (2), range spring
(27) and spring button (4).
6. Pry up the diaphragm(s) (20) and diaph ragm
gasket (19) around the perimeter of the body
(1) diaphragm fl ange to ensure that the
diaphragm(s) (20) are not “sticking”. NOTE:
Diaphragm gasket (19) is not used with a
com po si tion (soft) diaphragm.
7. Remove the diaphragm sub-assembly by
slid ing the pusher plate and stud (13) and
nut (11) in the direction of the regulator's
inlet, ap prox i mate ly 1/2"-3/4" (12-20 mm).
The push er plate and stud (13), stud nut
(10), and stud collar (16) should disengage
from the rock er arm (14) slot. Lift vertically
for the diaphragm sub-assembly re mov al.
8. Place the pusher plate and stud (13) in a
sepa rate vise, gripping the stud (13) on the
hex ago nal cast-in-place edges located on
the un der neath side of the pusher plate stud.
NOTE: Do not remove the stud nut (10),
stud collar (16), or cotter pin (15). Loosen
and remove pressure plate nut (11).
9. Remove pressure plate (3) by lifting.
10. Pry loose pusher plate and stud (13) from
diaphragm(s) (20) or from pusher plate gas-
ket (12). (Pusher plate gasket (12) is not
used with a composition (soft) diaph ragm.)
Remove the diaphragm(s) (20).
11. Remove pusher plate gasket (12) from
push er plate and stud (13).
12. Clean gasket sealing surface of pusher plate
and stud (13) thoroughly.
13. Install new pusher plate gasket (12), if re-
quired, over pusher plate and stud (13).
14. Install new diaphragm(s) (20) over pusher
plate and stud (13). NOTE: Refer to the
quantity of diaphragms (20) incorporated
per the bill of materials listing. Depending
on outlet pressure level, various quantities
of metal diaphragms will be “stacked”.
15. Inspect pressure plate (3) to ensure no
de for ma tion due to over-pressurization. If
de formed, bent, or otherwise distorted, re-
place.
16. Ensuring that the fl at side of the pressure
plate (3) rests against the dia phragm (20).
Place the pressure plate (3) over the pusher
plate and stud (13). Install pressure plate
nut (11) onto the stud (13) and tighten. Rec-
om mend ed torque val ues are as follows:
WARNING 2
1 Product of Fisher Scientifi c Com pa ny
DO NOT USE FIN GERS TO HOLD DIAPHRAGMS
(20) DURING TIGHT EN ING OF NUT (11). Use two
fl ange bolts (8) to keep multiple di a phragms' (20)
properly aligned with bolt holes while tight en ing the
stud nut (10).
CAUTION E
SYSTEM UNDER COMPRESSION.
Prior to removing fl ange bolts, relieve spring
compression by backing out the adjusting screw.
Failure to do so may result in fl ying parts that
could cause personal injury.