Flowserve Handwheels and Limit Stop - Manual (Page 4)

5-4 Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611
WARNING: Failure to repressurize process line
and actuator to atmospheric pressure could
result in serious personaI injury.
2. Slide the stem clamp and bellows off the actuator
stem.
3. Remove the bolt holding the handwheel to the
pinion shaft. Slide handwheel off pinion shaft.
4. Remove the housing set screw at the base of the
handwheel housing and the retaining ring Iock
screw which releases the compression on the
handwheel housing retaining ring.
5. Using two screwdrivers, remove the handwheel
housing retaining ring.
6. Pull the handwheel assembly off the yoke, taking
care not to gall the actuator stem O-ring as it is
pulled from yoke.
7. With the cylinder and piston removed (Step 1), pull
actuator stem straight out of the housing.
8. Remove the bearing spacer, lower bearing and
handwheel nut from the actuator stem.
9. To remove the pinion gear and shaft, remove the
pin retaining ring, rotate the pinion shaft so the pin
will not hit the indicator gear bearing, and push the
pin out. Slide the pinion shaft out of the pinion gear
and housing.
10. Remove the bevel gear, wave spring and the upper
thrust bearing.
11. If the pinion shaft bearings are worn or damaged,
push them out with a suitable press and a dowel the
same size as the bearing’s outside diameter.
12. Remove the upper actuator stem O-ring. (It is not
necessary to remove the O-ring retaining ring and
O-ring retaining washer).
13. The indicator cover plate is attached to the housing
with an adhesive gasket. Gently pry it off.
14. With a screwdriver, remove the two carriage screws
holding the position indicator assembly to the hous-
ing. Remove assembly from housing.
15. Normally the position indicator assembly does not
require disassembly. If disassembly is required,
remove the inside stem retaining ring located on the
lower end on the indicator stem. Screw the stem out
of the indicator nut.
Reassembly
To reassemble the side-mounted handwheel on Size
100 and 200 Iinear actuators:
1. Replace and lubricate all O-rings with a silicone
lubricant (Dow Corning ® 55M or equivalent). Clean
all internal parts thoroughly before beginning
assembly.
2. Insert upper actuator stem O-ring and replace
O-ring retaining washer and retaining ring.
3. If the pinion shaft bearings have been removed,
press in two new bearings with a dowel of the same
diameter, using a suitable press.
4. To install the bevel gear and bearings, place the
handwheel housing upside down. Lubricate the
upper ball thrust bearing and place it in the housing,
squarely on the machined shoulder.
5. Lubricate the bevel gear thoroughly on the teeth
and the outer surface where it makes contact with
the housing. Lubricate the inside of the square drive
tube. Position the bevel gear assembly into the
housing.
6. Lubricate the pinion gear, shaft and thrust bearings.
Reposition the pinion gear and thrust bearings.
Slide the pinion shaft through the outside of the
housing until it mates with the pinion gear. Rotate
the shaft until the hole in the pinion gear aligns with
the shaft. Insert pin and replace pin retaining ring.
7. Screw the handwheel nut midway onto the actuator
stem and insert the stem through the center of the
bevel gear. Be careful not to score the polished
surfaces of the actuator stem.
8. Position the wave spring on the shoulder of the
bevel gear. Lubricate the lower ball thrust bearing
and place it on the wave spring. Make sure the
bearing fits into the step in the bevel gear with the
wave spring sandwiched in between. Replace the
bearing spacer with the bearing fitting inside the
spacer’s lip.
9. After replacing the lower actuator stem O-ring in the
yoke, insert the yoke into the housing, taking care
not to gall the actuator stem on the stem bushings
or damage the O-ring.
10. Using two screwdrivers, replace the housing retain-
ing ring.
11. Rotate the housing to the desired orientation and
screw-in the retaining ring Iockscrew and reinstall
the housing setscrew until the retaining ring and
housing are locked securely in place.
12. Reinstall the handwheel and handwheel bolt onto
the pinion shaft. Fasten securely with nut.
13. Reassemble the position indicator assembly by
inserting the indicator stem onto the carriage. Screw
the indicator nut into the stem. Replace the stem
retaining ring. Turn the stem until the indicator nut
is centered between the two neutral marks stamped
on the carriage.
14. Turn the handwheel counter-clockwise until the
actuator stem begins to retract. Turn the handwheel
clockwise for two complete turns, so that the hand-
wheel nut is in the neutral position.