Flowserve MX Limitorque - Manual (Page 158)

Limitorque MX Maintenance and Spare Parts FCD LMENIM2314-00 – 07/08
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6
Spare and Replacement Parts
6.1 Guidelines for Recommended Spare Parts
Since every Flowserve 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 specific spare parts requirements for your 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. Flowserve recommends stock levels of between
5% and 10% of the total population of each part with a minimum of one 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
any time an actuator is disassembled. Complete actuator seal kits are available for the MX-05/10, the
MX-20/40 and the MX-85/140/150. Flowserve recommends stock levels for seal kits of 10% of the total
population of each actuator model and size. Also, an adequate supply of Flowserve approved oil (Mobil
SHC-632) should be maintained in stock to support any necessary maintenance or refurbishment.