Flowserve MX Limitorque - Manual (Page 14)

Limitorque MX Maintenance and Spare Parts FCD LMENIM2314-00 – 07/08
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2.3 Maintenance
2.3.1 Recommended Maintenance
Under normal operating conditions, the MX is a maintenance-free actuator. Therefore, for normal
applications, no formal actuator maintenance is required although visual inspection for oil leakage and
excessive noise is recommended every 1 million drive sleeve turns or every 3000 cycles. When condi-
tions are severe due to frequent operation or high 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 PTFE
tape or paste to achieve a proper seal.
2.3.2 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 Table 2.3 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.