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7B. Conshelf Supreme: Using the slotted tool (PN 081247)
place the tool in the two slots of the secondary diaphragm
retaining ring (Item 34), turn the tool counterclockwise
and remove the retainer. Next, using your fingertips,
lift upward on the secondary diaphragm (Item 33) and
remove it. Remove the first-stage from the bench vise and
pour out and discard the silicone fluid. Finally, remount
the first-stage in the vise in its former orientation to com-
plete the disassembly of the low-pressure side. Using a
large flat-bladed screwdriver, place the blade in the slot
on the adjustment screw (Item 31). Turn the screwdriver
counterclockwise and remove the adjustment screw. Lift
out the mainspring (Item 29).
8.
With a 1³⁄₈-inch "crow's foot" and breaker bar, turn the
wrench counterclockwise and remove the spring retainer
(Item 28). Lift out the spring pad (Item 27) and the thrust
washer (Item 26).
CAUTION: DO NOT attempt to "pry" the dia-
phragm out of the first-stage, as the diaphragm
seating shoulders in the first-stage will be
scratched, requiring replacement of the body
(Item 16).
9.
Secure the dust cap (Item 3) in place by means of the
yoke screw (Item 2). Using the low-pressure filtered air
directed down through a low-pressure port on the first-
stage body (Item 16), blow out the primary diaphragm
(Item 25). (See Figure 2). Discard the used diaphragm.
F
NOTE: Depending on how firmly the diaphragm is
retained on its supporting "seat", the low-pressure port
plugs (Item 20) may have to be in place when using low-
pressure filtered air to blow out the primary diaphragm.
10.
Remove the first-stage from the bench vise. Lift out the
pin pad (Item 18) and pin (Item 17).
F
Note: If you are working on a Conshelf 14 Supreme
300 Bar DIN first stage, perform the dissassembly
instructions in Appendix A on page 13. For the Yoke ver-
sion, perform steps 11-14 below..
11.
Mount the first-stage with the yoke screw facing up in the
bench vise by means of the CO
12.
Unscrew the yoke screw (Item 2) counterclockwise and
remove it from the yoke (Item 6).
13.
Disengage and remove the dust cap (Item 3). Remove
and discard the O-ring (Item 4).
14.
Using external retaining-ring pliers, remove the yoke
Figure 2
cartridge.
2
retaining ring (Item 5) from the groove on high-pressure
inlet boss of the first-stage body. Then, turning the yoke
counterclockwise, unscrew and remove it from the first
stage.
CAUTION: The retaining ring (Item 7) must be
removed carefully as the components beneath
it are under spring tension. Failure to place
your finger over the sintered filter (Item 9)
while removing the retaining ring will cause
loss or damage of these parts.
15.
With internal retaining-ring pliers, remove the retaining
ring and washer (Items 7 and 8) from the high-pressure
inlet boss. Discard the used retaining ring and washer.
16.
The sintered filter (Item 9) will pop out with the retaining
ring and washer. Remove and discard the sintered filter.
17.
Lift out the spring (Item 10), spring block (Item 11), high-
pressure seat spring (Item 14), and the high-pressure
seat (Item 15). Discard the used seat.
CAUTION: Use EXTREME care when removing
O-rings from grooves. Even a small scratch
across an O-ring sealing surface will result in
leakage. Once an O-ring sealing surface has
been damaged, the part must be replaced.
18.
Located inside the spring block (Item 11) is an O-ring and
backup ring (Items 13 and 12). Remove and discard both
the O-ring and backup ring.
19.
Remove the first-stage body from the vise. Remove the
CO
cartridge from the body by turning the cartridge
2
counterclockwise.
20.
Using a ¹⁄₂-inch wrench unscrew any remaining low-pres-
sure port plugs (Item 20). Remove and discard the port-
plug O-rings (Item 19).
This concludes the disassembly of the Conshelf First-Stage
Regulator.
SECOND-STAGE DISASSEMBLY
21.
Using a #2 Phillips screwdriver, unscrew the clamping
screw (Item 6) counterclockwise and remove it. Carefully
remove the clamp ring (Item 5).
22.
Lift off the box top (Item 4) and remove the second-stage
diaphragm (Item 8).
23.
Using external snap ring pliers, remove the retaining ring
(Item 7); then the purge button (Item 2) and its spring
(Item 3) from the box top (Item 4). Separate the spring
from the purge button.
CAUTION: During removal of the inlet fitting
(Item 11) depress the lever (Item 20). Failure to
keep the lever depressed could cause damage
to the sealing surface of the inlet fitting (Item
11).
24.
With the lever depressed, use a ³⁄₄-inch wrench to un-
screw counterclockwise and remove the inlet-fitting (Item
11). Remove and discard the inlet-fitting external O-ring
(Item 12).
5
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