IOM-C-CS
3
4. Pull hitch pin (21) and lift up on handle (6) to
remove.
5. Loosen and remove clamp nuts (13B), wash ers
(13D), bolts (13C) and clamps (13A). See
Figure 1.
6. Place matchmarks between body (1) and
spring chamber (2) to assist in final ori en ta tion
when re as sem bled. Lift spring chamber (2)
vertically up and off of body (1) and above
guide post (27) to remove.
Note alignment of
spring button (4) tabs (ears) with respect to
slot guides inside spring chamber (2).
7. Remove bearing (26). Lift up and remove
ad just ing screw cap (25.7) and dowel pin (25.8)
as sem bly.
NOTE:
May need to tap lightly on
O.D. of adjusting screw (25.6) to free Dowel
pin (25.8) from adjusting screw (25.6).
NOTE:
The two guide seals (25.9) may/may
not be extracted with as sem bly (25.7,25.8)
.
Re move guide seals (25.9).
8. Lift up the ad just ing screw (25.6 ) and spring
but ton (4) as an as sem bly to remove.
NOTE:
Do not rotate or re move spring button (4) from
ad just ing screw (25.6)
. Re move spring (7) and
lay aside.
9.
For
Metal Seat
:
Secure the pres sure plate
assembly (27,28 and 29) at the “flats” near
the base of pressure plate (28). Grasp the
lower portion of the plug (14) by the “flats”,
which protrudes from the body (1) inlet,
with soft-jawed pliers or soft-jawed vise and
pro ceed to turn CCW (viewed from above)
for dis as sem bly
. NOTE:
Main tain firm grasp
of plug (14). After dis en gage ment, plug (14)
could fall out of body (1) and damage seating
surface area.
Remove plug (14).
For
Composition Seat
:
The tail piece (14.3)
may disengage at the plug stem (14.1) joint,
instead of at pressure plate joint(28). If it does,
lift plug stem and pressure plate assembly out
of the body cavity.
Remove seat disc (14.2) from tail piece.
Secure "winged" end of stem (14.1)in a soft-
jawed vise. Use the "flats" on the pressure
plate to rotate CCW to remove pressure plate
assembly.
10. Lay pressure plate assembly (27,28 and 29)
and aside.
NOTE:
The travel of the guide post
(27) has been factory set.
Do not
loosen
or adjust the hex nut (29) on pres sure plate
assembly (27,28,29).
A. General:
1. Maintenance procedures here in af ter are
based upon removal of the regulator unit from
the pipeline where installed.
2. Refer to Figures 2 & 3 for basic regulator item
num ber reference ( ) and description.
B. Diaphragm – Trim Replacement:
1. Securely install the regulator in a soft-jawed
vise with the spring chamber (2) di rect ed
upwards. Ensure that the body (1) is not held
in the vise by the Tri-clamp
®
fitting con nec tions.
The regulator may be held in the vise with
flats on the plug (14). If this method is used,
ensure that the plug (14) is in contact with the
seating area of the body (1) and the face of
the inlet flange of the body (1) is resting on
the vise.
SECTION VI
2. Relax range spring (7) by turning handle (6)
CCW (viewed from above) until rotation stops.
Count and record the number of rev o lu tions
in the box below:
VI. MAINTENANCE
Number of revolutions required to relax
range spring: ________
3. Remove socket head set screw (30) CCW
from end of guide post (27).
SYSTEM UNDER PRES SURE. Prior to per form ing
any maintenance, isolate the reg u la tor from the
sys tem and relieve all pressure. Failure to do so
could result in personal injury.
WARNING
SPRING UNDER COMPRESSION. Relieve all
spring (7) compression prior to removing clamp
(13). Failure to do so may result in flying parts that
could result in personal injury.
WARNING
CAUTION
Do not apply spring load or operate regulator with
hitch pin (21) removed from top of guide post (27 ).
Pre ma ture di a phragm failure will re sult.
