Flowserve MX Limitorque - Manual (Page 159)

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Limitorque MX Maintenance and Spare Parts FCD LMENIM2314-00 – 07/08
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6.1.3 Critical Components
The following parts are not subject to wear but are still recommended for stock due to their critical
nature. 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. Motor
2. Encoder
3. Control module
6.2 Recommended Spare Parts for MX Actuators
6.2.1 Commissioning and Startup
No additional spare parts are required. All necessary spares are included in the end-user bag.
6.2.2 Short-Term Duty
This is defined as up to 3000 seats or up to 1 million drive sleeve turns, whichever occurs first. There
are no spare parts required for the actuator during short-term duty.
6.2.3 Long-Term Duty
This is defined as service beyond short-term duty but less than 6000 seats and less than 1.5 million
drive sleeve turns. The spares suggested for long-term duty are as follows:
• Quad rings at the top and bottom of the drive sleeve
• Drive sleeve assembly, which includes the worm gear
• Wormshaft assembly
• Encoder cartridge assembly
• Motor assembly
• Fuse (Controls, quantity 1)
• Fuses (Power, quantity 2)
• Encoder assembly
• Reversing starter/contactor with harness
• Control module (includes PCB-power, main, CP, and optional DDC and I/O boards)
• Bronze stem nut for thrust base
• Quad rings in thrust base (MX-10, -20, -40, -85, -140, and -150)
• Quad rings in B1 base
NOTE: Oil should be changed every 6000 seats or sooner if the oil has been contaminated with water or
other foreign material.