Instruction Manual
D103793X012
585CLS Actuator
October 2013
9
9. One thrust bearing (key 20) is now exposed. To expose the other thrust bearing, unscrew the gear (key 19) from the
sleeve (key 9).
Note
The bearing retainer (key 21) sits on top of six set screws (key 27). If the gear case is just going to be repacked and no parts are
changed which would change the free play in the bearings, you do not need to make any adjustment with the set screws.
10. Upon reassembly, pack the bearings (keys 20 and 40) with lithium grease. Also apply lithium grease to the surfaces
of the sleeve and the bearing surfaces of the worm shaft. Use the zerk fitting for periodic lubrication after assembly.
11. Reassemble in the reverse order of the above steps observing the following points:
a. Line up the key (key 28) with the slot in the sleeve.
b. After the unit is reassembled, adjust the set screws (key 27), if necessary, to eliminate free play in the bearings.
Lock the set screws in place with the hex nuts (key 41).
Note
Over-tightening the set screws will make handwheel operation difficult.
Stem Connection Procedure
The following procedure is for a push-down-to-close valve. The objective of this procedure is that the stem connection
must be made so that the valve strokes from full open to closed before the actuator reaches full stroke.
CAUTION
To avoid damaging the seating surfaces, do not rotate the valve plug while it is seated. Avoid damage to the valve plug
stem by careful use of tools during travel adjustments.
1. With the valve assembled and actuator mounted, make sure the valve plug is in the closed position. Then turn the
two stem locknuts (key 23) all the way onto the stem thread.
2. Starting with the cylinder fully retracted, manually or with air pressure extend the piston rod extension the specified
valve travel.
3. Attach the stem connector (key 22), clamping the piston rod extension to the valve stem. Be sure you also attach
the feedback arm and travel indicator (key 3).
4. Cycle the actuator to check availability of desired total travel and that the valve plug seats before the cylinder
reaches the end of its stroke. You can make minor travel adjustments, if necessary, by loosening the stem
connector (key 22) slightly, tightening the locknuts (key 23) together, and (with the valve plug off the seat)
screwing the stem either into or out of the stem connector (key 22) by means of a wrench on the locknuts.
5. If the total travel is adequate, tighten the stem connector (key 22) securely, lock the stem locknuts (key 23) against
the connector, and adjust the indicator scale (key 7) on the yoke to show valve plug position.
6. Provide a gauge, if necessary, to measure the pressure to the actuator. Make a final adjustment on the positioner to
set the starting point of valve travel and to obtain full travel for the given instrument range.
Parts Ordering
When corresponding with your Emerson Process Management sales office about this equipment, refer to the serial
number found on the actuator nameplate (key 21). Also, specify the complete 11-character part number from the
following Parts List when ordering replacement parts.
