Cashco 9540R P/P - Manual (Page 3)

IOM-9540R 3
D. Existing Control Valve Modifications:
1. Refer to IOM-48 or IOM-148 for instructions
for the rotary actuators used on Ranger QCT,
Premier EZO and Premier (unlined).
2. All indicated Item Numbers that are with
respect to IOM-48 or IOM-148 will be in paren-
thesis and underscored; i.e. (32). All part Item
Numbers that are with respect to this
IOM-9520R are not underscored; i.e. (32).
NOTE: If no handwheel (58) or adjusting screw
assembly is provided with the actuator, it is
recommended that the rod end (9) be un-
coupled from the arms (5) by removal of bolt
(40). See IOM-48 or IOM-148. Use of air
loading into the actuator casing (1) is pos-
sible, but introduces safety considerations;
i.e. use “tools” and not “fingers” inside the arm
housing (4) area.
3. Remove cover plate (20).
4. Steps to change the mounting and stem inter-
connection between the valve end-of-shaft
and the positioner unit. These changes bring
the positioner into compliance with NAMUR
Standard VDI/VDE #3845.
#48 Actuator: (See Figure 3)
a. Turn actuator handwheel CW to remove
stem windup torque. The linkage from the
actuator stem (9) will become slack. May
require 1-3 revolutions. This will ease
removal of cap screws (31).
b. Remove three cap screws (31), dial lens
(14), travel indicator dial (15), cover plate
(13), cap screw (32), travel indicator (16),
lock washer (55) and pin (51). Remove
bearing (18), both bearing flanges (19)
and indicator spacer (17).
c. Discard removed dial lens (14), travel
indicator dial (15), cap screw (32), travel
indicator (16), washer (55), pin (51) and
indicator spacer (17). Save only cover
plate (13), bearing (18) and both bearing
flanges (19) for re-use.
d. Position the new positioner spacer (17)
over the valve stem (7 - Ranger, 3.2 -
Premier) end, oriented as shown below in
Figure 2.5.
e. Put Locktite #242 thread locking sealant,
or equal, onto the set screw (77). Engage
the set screw (77) into the tapped end of
the spacer (17), until the set screw (77) is
projecting out of the spacer (17)
3/16" – 1/4" (5 – 6 mm).
f. Position positioner baseplate (26) to
positioner mounting bracket (76) properly
oriented such that positioner baseplate
(26) bottom edge is parallel to the bottom
edge actuator arm housing (4). Opposite
side boltholes of bracket (76) must also
align with boltholes of actuator arm hous-
ing (4) and cover plate (13). Use four cap
screws (79) to secure the baseplate (26)
to the bracket (76). Place connected
parts (26, 76, 79) aside.
g. Position bearing flanges (19) with re-
tainer ball bearing (18) over the spacer
(17). Align the bearing flange (19) bolt
holes with the arm housing (4) bolt holes.
h. Position cover plate (13) over the bearing
flanges (19) aligning the cover plate (13)
bolt holes with those of the bearing
flanges (19). Hold cover plate (13) on
outer edge with fingers. NOTE:
Ensure
that the three tapped holes in the cover
plate (13) used to mount the bracket (76)
are near the 1 o'clock, 5 o'clock and 9
o'clock positions. Engage three cap
screws (31) to secure spacer (17), bear-
ing flanges (19) and cover plate (13)
securely to arm housing (4). NOTE
: It
may be necessary to rotate the actuator
manual handwheel operator (58) down-
wards, or alternately supply a small level
of air pressure (5-7 psig, .34 - .50 Barg) to
assist in aligning bolt holes for cap screws
(31). Do not tighten one cap screw (31)
until all three cap screws are partially
thread-engaged.
i. Position connected parts (26, 76, 79) of
Step 4f., above, with the bracket (76) up
and pressing against the cover plate (13),
engaging the tongue-and-groove joint
between the positioner baseplate rotary
shaft (32) and the spacer (17) with its
protruding set screw (77). Engage new
cap screws (78) to secure the bracket
(76) to the cover plate (13). 17
7
3.2
77
Actuator Casings
(1, 2) on Topside
(Viewed looking
at Shaft end.)
Ranger
Premier
Figure 2.5: Spacer Orientation