IOM-SLR-2
11
6. Remove snap ring (7) from piston (14).
7. Lift piston (14) out of body (1) and remove
back-up ring (19) and piston o-ring (20).
Remove body gas ket (10).
8. Clean body (1) according to owner's pro-
cedures.
NOTE:
On reg u la tors origi nally
sup plied as “oxygen clean”, Option-55,
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.
9.
Inspect and replace any necessary parts.
Use only parts man u fac tured and supplied
by Cashco, Inc. for these products. See
Section VIII.
10. Place a new gas ket (10) onto the body (1)
flange. 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).
11. Install snap ring (7) above piston assem-
bly. Position pusher plate (18) on top of
piston post.
12. 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 firmly seated against the
body gasket (10). Tighten to the fol low ing
torque val ue: 65–70 Ft lbs (88–95 Nm).
13. 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.
N. Trim Replacement - (Loader w/50 - 1250
psig range springs)
1. Remove spring chamber subassembly
and piston subassembly per Section VI,
Steps M.1. – M.7.
2. With a 5/16" socket - rotate seat retainer
(13) CCW to remove from the body.
3. Remove the pressed in seat (12) from re-
tainer (13). Remove poppet (8) and poppet
spring (9).
4. Clean debris from within the body (1) cavi-
ty. Clean all parts to be reused according to
own er's pro ce dures.
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. Contact factory for de tails.
5. Inspect all parts for damage and replace if
necessary.
NOTE:
Use only parts man u-
fac tured and supplied by Cashco, Inc. for
these products. See Section VIII.
6. Place poppet spring (9) into body cavity.
7. Place poppet (8) inside the poppet spring
(9). The angled seating surface of the
poppet must face up toward the seat (12).
8. Install new seat retainer (13) with seat
(12) into body (1) cav i ty with the seat fac-
ing down ward toward the angled seat ing
surface of the pop pet (8). Tighten seat
re tain er to the following torque val ue:
12 – 15 Ft-lbs (16 – 20 Nm).
9. Reinstall piston subassembly and spring
chamber assembly per Section VI, Steps
M.10. – M.12.
10. Bench test unit for suitable operation.
NOTE:
Regulators are not tight shutoff
devices. Even if pressure builds up be-
yond set point, a reg u la tor may or may not
develop bubble tight shutoff.
11. Pressurize with air and spray liquid leak de-
tec tor around body (1) and spring cham ber
(6) to test for leakage. En sure that an outlet
pressure 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 minimum.
12. Install loader on mounting bracket and
connect inlet and outlet tubing.
