Flowserve 10 ACCESS I 39 Actuator with AS Interface - Manual (Page 8)

8 10, 15, 20 Access I 39 Acutators with AS Interface WCAIM2041
REBUILDING INSTRUCTIONS
NOTE: For identification of all numbered parts discussed below,
consult exploded view of actuator.
After actuator has been repaired, mark rebuild label accordingly and
apply to actuator.
ACTUATOR DISASSEMBLY
1. Disconnect the air supply and electrical service to the actuator.
2. Remove the actuator and its mounting bracket from the valve.
(See Caution note below.)
CAUTION: Ball valves can trap pressurized media in the
cavity. Isolate the piping system in which the actuator/valve
assembly is mounted and relieve any pressure on the valve.
For all the valves listed in Installation Section D, the actuator
bracket can be removed without loosening or removing any
valve body bolts.
3. Remove the actuator bracket from the actuator to begin repair.
(Note mounting of removed bracket for easy reassembly.)
4. It is not necessary to remove the control block (7A) to rebuild
actuator. However, if it becomes necessary to remove the block,
begin by removing the block bolts (7D). Use care to retain the
block gasket (9A or 9B).
5. Each end cap (5A and 5B) is aligned onto the body (1) over a
“foolproof pin”. This ensures that the end caps can only be
assembled to their respective end of the actuator. Remove all four
metric screws (5C) from and remove both end caps. Remove the
two bearings (6A) and O-rings (15A and 15B) from each end cap.
CAUTION: If the actuator is a spring-return model, first
remove two end cap screws diagonally opposite each other,
then lubricate the threads and under the head. Replace the
screws and repeat procedure for the other two screws. Do this
for each end cap as this will aid reassembly. Now uniformly
loosen all four end cap screws on each end cap two to three
turns at a time, in sequence, to relieve pre-load of the
springs. On larger actuators with springs use caution when
removing end caps. End cap screws are long enough to allow
springs to relieve before disengaging.
After the screws are removed, gently pry off each end cap, being
careful not to damage the end cap O-Rings.
6. The two piston guide rod (4) assemblies can now be removed
from each end of the body and disassembled by removing the
piston set screws (12). Do not interchange piston guide rods (4)
and their respective piston (3). For some actuators, each guide
rod and piston may be press fitted together (do not use set
screws) and cannot be disassembled. (To assist reassembly, mark
the body with a line on the side from which the guide rod using
the thru-hole is removed). Remove all O-rings (15B) and (15C)
and bearings (6B) from pistons (3).
7. The shaft (2) can only be removed after piston assemblies are
taken out. Remove the position indicator (17) (if any), the shaft
clip (15F) (not a reusable part!) (see Note below) and the S.S.
washer from the top of shaft. Then remove the shaft through the
larger opening in the bottom of the body. The top bearing (15G)
and the O-ring (15D) can
now be removed. Remove
the two S.S. washers and
thrust bearing (10) from the
top of the shaft and the O-
ring (15E) and bearing (15H)
from the bottom end.
NOTE: Some actuators may
be using a spiral ring type
shaft clip as shown at right.
To remove this clip, engage
the lower end of the ring with
a flat blade screwdriver. Using
another flat blade screwdriver
push the top end of the clip in
the opposite direction. As the
clip I.D. expands lift the clip
from the shaft. The
installation of a new clip
would be the above steps in reverse and ensuring that the edges of
the clip are properly seated in the shaft groove.
ACTUATOR REASSEMBLY
1. Be sure the actuator surfaces are clean and free of grit and
scratches. If the inside walls of the body are scored, or the guide
rod surfaces are scratched, the actuator will leak after rebuilding.
New parts should be obtained from the factory. Light tracking,
barely detectable to touch, is acceptable.
2. All rebuilding kit O-Rings and bearings may now be installed.
Lubricate the standard actuator thoroughly with a #1 grease.
Apply a light film of grease to all O-Rings. (Note that kits also
contain some parts for earlier revisions of actuators which will
not be needed.)
3. Replace the two split-ring style bearings (6A) and one guide rod
O-Ring (15B) in each end cap.
Replace the split-ring style bearing (6B) and guide rod O-Ring
(15B) into I.D. grooves in each piston. Install O-Rings (15C)
onto pistons.
4. Replace O-ring (15E) and bearing (15H) on the bottom of shaft.
On the top of the shaft add the two S.S. washers with the thrust
bearing (10) between them. Locate the top bearing (15G) and O-
ring (15D) into the body.
NOTE: Top bearing (15G) is flat, the same as and interchangeable
with thrust bearing (10). Replace the shaft through the larger
opening in the bottom of the body.
5. Very carefully align the piston guide rod assemblies inside the
body. Keep the pistons square to the body.
Flow Control
Worcester Controls
Figure 4