Flowserve MX Electronic Actuator - Manual (Page 19)

19
Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
flowserve.com
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 stem 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 stem nut to suit the valve stem. Ensure sufficient clearance to avoid unnecessary wear and heating
during operation.
Reassembly – Units MX-85
Refer to Figure 3.8.
1. Clean the stem nut, washers, and bearing(s) thoroughly.
2. Slide second set of thrust washers and bearing in place if removed.
3. Install stem nut. Lubricate thoroughly.
4. Install first set of thrust washers and bearing.
NOTE: Order of assembling thrust washers and bearing must be as follows: washer, thrust bearing, washer.
NOTE: Fill base with Nebula EP 0, Conoco Conolith EP 00, Dynalife-L-EP0, Mobil SHC 632, Triton ELL, or Lithium based
EP0 grease.
Thrust baseplate installation
Mount baseplate to thrust base housing and install the six socket head cap screws to the proper torque per Table 3.1.
Table 3.1 – Hardware and torque for thrust base mounting
Screw Size
Torque
ft-lb N m
M8 or 5 ⁄
16
in. (8 mm) 12-14 16-19
M10 or 3 ⁄
8
in. (9 mm) 25-30 33-40
M12 or 1/2 in. (13 mm) 40-50 53-67
M16 or 5 ⁄
8
in. (16 mm) 90-100 122-135
M20 or 3/4 in. (19 mm) 180-200 244-271
NOTE: Screw mounting torque for mounting thrust base to main housing or thrust baseplate to thrust base housing.