Cashco Premier - Manual (Page 5)

IOM-148 5
V. MAINTENANCE
A. General:
1. Hereafter, all maintenance, disassembly, etc.,
is as sumed to be done in an indoor shop.
2. Most actuators are a sub-assembly that is
unitized with a body sub-assembly. Ref er ence
should be made to the IOM for the correct
body utilized.
3. Where the body is not being disassembled,
special care MUST be exhibited to prevent
valve stem rotation during any disassembly
or reassembly for all types of valves. Follow-
ing this procedure will ensure not damaging
seat ing surfaces.
4. Remove all instrument tubing and in ter con -
nect ed electrical wiring. Label “ends” to en sure
proper reconnection.
5. All indicated Item Numbers that are with re-
spect to IOM-Ranger, IOM-Premier EZO or
IOM-Premier Unlined will be in parenthesis
and underscored; i.e. (20); the same is true
for Model 73N-B P/P positioner parts.
6. All Item Numbers that are with respect to this
IOM-148 are not underscored; i.e. (19).
7. Item Numbers that relate to the Models 9540
or Smart positioners ((PA)) are in a double
set of pa ren the sis and are underscored; i.e.
((3)).
B. Separation of Body Assembly (BA) from Ac-
tu a tor Assembly (AA):
1. Place completely joined valve assembly (AA)
(BA) upon a fl at work surface with suf fi cient
room to move the individual sub-as sem blies
(AA) (BA) around. Place matchmarks on valve
yoke (12), dust cover plate (23), arm housing
(4) and ac tu a tor lower casing (2) to use as
ref er enc es at re-assembly.
2. Remove cover plate (20) away from arm
hous ing (4) by removing four machine screws
(36).
3A. Units with Model 73N-B P/P Positioner or No
Positioner, and No Travel Limit Switch:
a. Remove the two cap screws (31) se cur ing
the travel indicator dial lens (14) and travel
indicator dial (15) using a 3/16" allen key
wrench. Using a sharp pointed tool, hook
under the edge of lens (14) and in di ca tor
dial (15) to remove.
b. Remove cap screw (32) and lock tooth
washer (55) se cur ing the bright orange-
col ored travel in di ca tor (16) to the upper
end of valve stem (Rang er (7)), (Premier
(3.2)) using a 7/32" allen key wrench.
Re move travel in di ca tor (16) off of pro-
trud ing lo ca tor pin (51).
c. If equipped with a Model 73N-B P/P
positioner, re move the four cap screws
(33) that secure the positioner assembly
(PA) to the arm housing (4) using a 3/16"
allen key wrench. Remove positioner as-
sem bly (PA) and feed back range spring
(102). Loop a 6" piece of fi ne wire around
the feedback linkage subassembly (72).
Place one screw (33) back into a tapped
open ing. Pull wire taut and wrap around
pro trud ing screw (33) to keep the linkage
(72) from interfering with further dis as-
sem bly.
3B. Units with End-of-Shaft Model 9540R Posi-
tioners:
a. Remove clear indicator cover ((22)) by
removing two cap screws ((A3)).
b. Remove red plastic pointer ((34)) by pull-
ing outwards from hub of post-end screw
((23)).
c. Make a matchmark on the char ac ter iza-
tion cam ((24)) at the point where the
cam follower ((31)) touches. Using a
wrench remove post-end screw ((23))
that se cures characterization cam ((24)).
Pull feedback lever ((13)) downwards;
re move cam ((24)) and adhered to lock
toothed washer ((28)) and shouldered
wash er ((27)).
d. Remove the positioner unit ((I/P)) ((P/P))
from the baseplate ((26)) by removing cap
screws ((11)) with lock washers ((12))
from side and back of baseplate ((26)).
e. Remove the four cap screws ((78)) se cur-
ing the bracket ((76)), baseplate ((26))
assembly and coverplate (13) to the arm
housing (4).
3C. Units with End-of-Shaft Model 991 or PS2
I/P Positioners:
a. Remove cap screws (31) securing the
positioner mounting bracket ((9)) to
coverplate (13).
b. Set positioner / bracket assembly off to
the side.
c. Remove set screw ((16)) and washer
((17)) from end of the valve stem (Ranger
(7) or (Premier (3.2)) securing carrier
linkage ((3)) to stem.
d. Remove linkage ((3)) from end of stem.
SECTION V