Flowserve MX Electronic Actuator - Manual (Page 18)

Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
18
Pilot removal
MX-10/20: Remove the screw and washer holding the valve pilot to the thrust base and remove pilot.
MX-40: Turn counterclockwise (CCW) and remove.
Thrust bearing and nut removal
1. Remove the first set of thrust washers and bearing.
2. Remove stem nut.
NOTE: The thrust washers, bearing, and thrust nut may be removed at the same time. The second set of thrust washers
and bearing does not have to be removed.
3. Machine the thrust nut to suit the valve stem. Ensure sufficient clearance to avoid unnecessary wear and heating
during operation.
Reassembly – Units MX-05/10/20/40
Refer to Figure 3.7.
1. Clean the thrust nut, washers, and bearing(s) thoroughly.
2. Slide second set of thrust washers and bearing in place if removed.
NOTE: Order of assembling thrust washers and bearing must be as follows: washer, thrust bearing, washer.
Pilot installation
MX-05/10/20: Slide pilot into thrust base assembly and secure with washer and screw. Tighten fully.
MX-40: Place pilot into thrust base and turn clockwise (CW) until pilot is tight.
NOTE: Fill base with Nebula EP 0, Conoco Conolith EP 00, Mobil SHC 632, Dynalife-L-EP0, Triton ELL, or Lithium based
EP0 grease.
Disassembly – Units MX-85
Refer to Figure 3.8.
Disassembly of the main housing from the base may be recommended to allow the base to remain on the valve if the
actuator must be removed for service.
Thrust base mounting plate removal
Remove the six socket head cap screws holding the valve mounting plate to the thrust base housing and remove
mounting plate.
Figure 3.7 – Exploded view of A1/A1E base (MX-05/10/20/40 only)
Housing
Socket head cap
Socket head cap screw
Washer
Quad ring
Thrust washer
Pipe plug
Thrust Nut
Thrust washer
O-ring
Thrust
pilot
Quad ring
Needle bearing
Thrust base
standard nut
Thrust base
extended nut