Flowserve MX-85 Actuator - Manual (Page 14)

Flow Control
Limitorque Actuation Systems
6 MX-85/140 Maintenance and Spare Parts FCD LMAIM1341-00
temperatures, inspect the oil level and oil quality more often. Replace any seals that permit oil leakage or water ingress.
When installing pipe plugs, use Teflon
® tape or paste to achieve a proper seal.
2.4.2 Unit Lubrication
Check for proper oil level every 1 million drive sleeve turns (reference Installation and Operation Manual – Diagnostics
Section to learn how to view drive sleeve turns data). Change oil every 6000 unit cycles or if water or other foreign
material is found during oil inspection.
Oil Level Inspection and Fill Criteria
(Reference Lubrication Data table below for oil capacities when mounted in varying positions.)
• Actuator viewed in upright position (top-mounted handwheel up): Oil level should be approximately 1 inch (25.4 mm)
below the outer surface of the housing at the oil fill port.
NOTE: Do not overfill with oil because oil will expand during actuator operation. Actuators are shipped with an oil
volume suitable for any mounting position. When checking the factory-supplied oil level, excess oil may drain from the
highest oil fill port due to the various mounting orientations of each application.
• Actuator viewed in side-mounted position (terminal compartment up): Oil level should be up to the bottom of the oil
fill plug.
• Actuator viewed in all other positions than described previously should have the oil capacities maintained. Fill through
the highest oil fill port until the oil is at a level that will contact the bottom of the pipe plug when installed in oil fill port.
Figure 2.3 – Oil Fill/Plug Locations
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Lubrication Data
• Oil Specifications
MX actuators are oil-filled using Mobil SHC-632, which is a synthetic oil suitable for ambient temperatures of -22˚F to
250˚F (-30˚C to 120˚C). For extreme low temperature conditions, alternative lubricants are available – consult factory for
further information.
Table 2.3 – MX-85 and 140 Oil Capacities when using Oil Fill/Plug Ports
Nominal Oil Capacities oz. liters
All Configurations 192 5.7