Flow Control Division
Limitorque Actuation Systems
Spare & Replacement Parts
Accutronix MX Maintenance & Spare Parts Manual 130-12000 Revision B • November 2002 6-1
6 Spare & Replacement Parts
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 specific 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, & 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 disassembled. Complete actuator seal kits are available for the MX-05/10, the
MX-20/40 & the MX-85/140. Limitorque recommends stock levels for seal kits of 10% of the total popu-
lation of each actuator model and size. Also, an adequate supply of Limitorque approved oil (Chevron
SHC-632) should be maintained in stock to support any necessary maintenance or refurbishment.
6.1.3 Critical Components
The following parts are not subject to wear but are still recommended for stock due to their critical
nature. 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. Motor
2. Encoder
3. Control Module
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