Flowserve LY Series Limitorque - Manual (Page 46)

Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
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7.1.2 Factory Lubricant
The LY actuator gear case is factory-lubricated with an NLGI Grade 0 lithium-base grease suitable for
temperatures from -20°F (-29°C) to 250°F (121°C). For temperatures above or below this range, consult
the factory.
7.2 Minimum Lubricant Qualities Required
The standard lubricants used by Flowserve have been proven to be extremely reliable over years of
service. Flowserve does not recommend a particular lubricant substitute for the standard lubricants;
however, Flowserve does require the following lubricant qualities as a minimum.
a CAUTION: Do not mix lubricants of a different base chemical. Mixing lubricant bases may cause
lubricant properties to be ineffective.
The lubricant must:
• have “EP” properties.
• be suitable for the temperature range intended.
• be water and heat-resistant and non-separating.
• not create more than 8% swell in Buna N or Viton.
• not contain any grit, abrasive, or fillers.
• slump NLGI 0 or 00.
• not be corrosive to steel gears, ball, or roller bearings.
• have a dropping point above 316°F (158°C) for temperature ranges of -20°F (-9°C) to 250°F (121°C).
7.3 Disassembly and Reassembly
a CAUTION: Turn off all power services before attempting to perform service on the actuator.
POTENTIAL HIGH-PRESSURE VESSEL. Before removing or disassembling your actuator,
ensure that the valve or other actuated device is isolated and not under pressure.
7.3.1 LY 1001 Disassembly
Unless otherwise noted, piece numbers refer to the Illustrated Parts Breakdown of Figures 6.5, 6.6,
and 6.7.
c WARNING: HAZARDOUS VOLTAGE. Turn off all power before disassembling your LY actuator.
c WARNING: POTENTIAL HIGH-PRESSURE VESSEL. Before disassembling your actuator, ensure
that the valve or other actuated device is isolated and is not under pressure.
Remove Cover and Top Plate
1. Turn off all power to the actuator.
2. Remove the Control Cover (piece #3).