IOM-SLR-2
9
I. Loading Regulator Disassembly:
WARNING
SYSTEM UN DER PRES SURE. Prior to performing
any maintenance, isolate the reg u la tor from the
system and relieve all pres sure. Failure to do so
could result in personal injury.
J. General:
1. Maintenance procedures hereinafter are
based upon removal of the loading regulator
from the main regulator.
2. Owner should refer to owner's procedures for
removal, handling, cleaning and disposal of
nonreusable parts, i.e. gaskets, etc.
3. Refer to Figures 6 and 8 for item numbers
for Brass and SST Loaders. (Figure 9 for
High Pressure Construction.) For Aluminum
Loaders - contact Cashco Inc.
4. Remove cap screws that secure loader to
mounting bracket. Disconnect tubing and
fittings between loader and main regulator.
CAUTION
To prevent damage to body, use lead jaws when
placing body in a vise. Position so that vise closes
over the flats on lower end of body.
K. Diaphragm Replacement - (Loader w/2 - 750
psig range springs)
1. Securely the body (1) in a vise with the knob
(4) directed upwards.
2. Relax range spring (15) by turning knob (4)
CCW until rotation comes to a complete stop.
NOTE:
It is not necessary to remove knob
before removing the spring chamber from the
body.
3. To remove spring chamber (6), grasp the
flats and rotate CCW. Upon removal, the
spring (15), clip (16), and spring button (5)
should remain inside the spring cham ber.
SPRING UNDER COMPRESSION. Prior to re mov ing
spring chamber, relieve range spring com pres sion
by turn ing knob CCW until ro ta tion comes to a
com plete stop. Failure to do so may result in flying
parts that could cause personal injury.
WARNING
Figure 6
Internal View
4. Remove the diaphragm subassembly (7):
con sist ing of the nut (7.3), diaphragm (7.1),
ac tu a tor post (7.2), ac tu a tor gasket (7.4),
ac tu a tor o-ring (7.5).
5. Secure actuator post (7.2) in soft jawed vice.
Rotate actuator nut (7.3) CCW to remove and
separate all parts of the diaphragm subas-
sembly (7).
6. Remove
di
a phragm gas ket (10).
7. Clean body (1) diaphragm flange and all
re us able parts according to owner's proce-
dures.
Do not scratch di a phragm gas ket
seat ing sur face.
NOTE:
On reg u la tors
origi nally sup plied as “oxygen clean”, Op-
tion-55, main tenance must in clude a level
of clean li ness equal to Cash co's clean ing
stan dard #S-1134.
8. Place a new diaphragm gas ket (10) onto the
body (1) diaphragm flange.
9. Reassemble
di
a phragm subassembly (7) by
plac ing the actuator gasket (7.4), new di a-
phragm (7.1), and actuator o-ring (7.5) over
the threads of the actuator post (7.2). Place
a thread sealant com pound on the threads of
the ac tu a tor post (7.2) prior to installing the
actuator nut (7.3). Install ac tu a tor nut (7.3)
and tighten to the fol low ing torque value:
15 Ft-lbs (20 Nm).
10. Place the diaphragm gas ket (10) onto the
body (1) diaphragm flange. Place di a phragm
sub as sem bly on top of the gasket (10).
11. Lubricate the threads of the body (1) with
a light weight grease that is compatible with
service use. Ro tate the spring chamber (6)
