Flowserve MX-85 Actuator - Manual (Page 87)

Flow Control
Limitorque Actuation Systems
FCD LMAIM1341-00 MX-85/140 Maintenance and Spare Parts 79
6.1 Guidelines for Recommended Spare Parts
Since every Limitorque actuator is designed to meet a specific application, the recommended spare parts needed to
support the actuator will vary for every project. The following guidelines are provided to assist in determining the spe-
cific spare parts requirements for your Limitorque MX actuators.
6.1.1 Wear Components
The following components will eventually wear under normal use and should therefore be planned as spares. The
expected lifetime of these parts will vary from application to application. They are listed in order of most frequent to
least frequent replacement. Limitorque recommends stock levels of between 5% and 10% of the total population of
each part with a minimum of 1 of each in order to support the product for life.
1. Stem Nut
2. Worm Shaft subassembly
3. Drive Sleeve subassembly
6.1.2 Bearings, O-rings and Seals
All bearings should be replaced any time an actuator is refurbished. Therefore, all bearings should be planned for stock
for any scheduled refurbishment. In addition, any O-ring or seals should be replaced anytime an actuator is disassem-
bled. Complete actuator seal kits are available for MX-85/140. Limitorque recommends stock levels for seal kits of 10%
of the total population of each actuator model and size. Also, an adequate supply of Limitorque approved oil (Mobil
SHC-632) should be maintained in stock to support any necessary maintenance or refurbishment.
6
Spare and Replacement Parts