Cashco P5 - Manual (Page 3)

IOM-P5 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 mov ing
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 pipe-
line 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 Model P5 basic reg u -
la tor and Figure 1 for the piston subassembly.
B. Piston Replacement:
1. Securely install 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 the knob
before removing the spring chamber (6) from
the body (1).
3. Remove spring chamber (6) 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. Remove pusher plate (18).
4. Remove snap ring (7) from piston.
5. Lift piston (14) out of body (1) and remove back-
up ring (19) and piston o-ring (20). Remove
body gas ket (10).
6. Clean body (1) according to owner's proce-
dures. 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.
Use only parts man u fac tured and supplied by
Cashco, Inc. for these products. See Section
VIII.
8. Place the gas ket (10) onto the body (1) fl ange.
Use o-ring lube on o-ring (20) and slide o-ring
and back-up ring (19) on piston (14). Place
piston sub as sem bly into the body (1).
9. Install snap ring (7) above piston assembly.
Position pusher plate (18) on top of piston post.
10. Lubricate the threads of the body (1) with a
light weight grease that is compatible with ser-
vice use. Ro tate the spring chamber (6) CW by
hand onto the threaded portion of the body (1)
until fi rmly seated against the body gasket (10).
Tighten to the fol low ing torque val ue: 65–70 Ft
lbs (88–95 Nm).
11. Pressurize with air and spray liquid leak de tec-
tor around body (1) and spring chamber (6) to
test for leakage. En sure that an outlet pres sure
is main tained during this leak test of at least mid-
range spring level; i.e. 2-100 psig (.14-6.9 Barg)
range spring, 51 psig (3.5 Barg) test pres sure
min i mum.
Figure 1:
Piston 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.