Cashco P2 - Manual (Page 3)

IOM-P2 3
SECTION VI
VI. MAINTENANCE
To prevent damage to body, use soft jaws when
placing body in a vise. Position so that vise
closes over the fl ats on lower end of body.
5
SPRING UNDER COMPRESSION. Prior to re-
moving spring chamber, relieve range spring
com pres sion by turn ing knob (4) CCW until
ro ta tion comes to a com plete stop. Fail ure to
so so may result in fl ying parts that could cause
personal injury.
WARNING
CAUTION
A. General:
1. Maintenance procedures hereinafter are
based upon re mov al of the regulator unit from
the pipeline where in stalled.
2. Owner should refer to owner's procedures for
removal, handling, cleaning and disposal of
non reuseable parts, i.e. gaskets, etc.
3. Refer to Figure 2 for basic reg u la tor and Fig-
ure 1 for the diaphragm sub as sem bly.
B. Diaphragm Replacement:
1. Securely install the body (1) in a vise with
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 (6) from
the body (1).
3. Remove spring chamber subassembly by
grasping the fl ats and turning CCW. Upon
removal, the range spring (15), range spring
clip (16), and spring button (5) should remain
inside the spring cham ber.
4. Remove diaphragm subassembly (7) con-
sist ing of the actuator 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). Remove di a-
phragm gas ket (10).
5. Remove actuator nut (7.3) and separate all
parts of the diaphragm subassembly (7).
6. Clean body (1) diaphragm fl ange and all re us-
able parts according to owner's procedures.
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”, Option-M, main-
tenance must in clude a level of clean li-
ness equal to Cash co's clean ing stan dard
#S-1134. Contact factory for details.
7. Inspect and replace any necessary parts.
NOTE: Use only parts man u fac tured and
sup plied by Cashco, Inc. for these products.
See Section VIII.
8. Reassemble di a phragm subassembly (7) by
plac ing the actuator gasket (7.4), 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).
9. Place the diaphragm gas ket (10) onto the
body (1) diaphragm fl ange. Place di a phragm
subassembly on top of the gasket (10).
10. Lubricate the threads of the body (1) with
a light weight grease that is compatible with
service use. Ro tate the spring chamber (6)
CW by hand onto the threaded portion of
the body (1) until fi rmly seated against the
diaphragm gasket (10). Tighten to the fol low-
ing torque val ue: 65–70 Ft lbs (88–95 Nm).
Figure 1: Diaphragm Subassembly
WARNING
SYSTEM UN DER PRES SURE. Prior to per form ing
any maintenance, isolate the reg u la tor from the
sys tem and relieve all pres sure. Failure to do so
could result in personal injury.