Flowserve L120-85 Actuator - Manual (Page 25)

6.1 Lubrication
6.1.1 Initial Inspection
NOTE: Before operating your actuator, inspect it for proper lubrica-
tion, (especially if it has been stored for a long period of time).
No seal can remain absolutely tight at all times; therefore, it is not
unusual to find a very small amount of weeping around shaft seals
— especially during long periods of idleness such as storage. Using
grease minimizes this condition as much as possible. If you find a
small amount of weeping at startup, remove it with a clean rag. Once
the equipment is operating, the weeping should stop.
6.1.2 Frequency
Base the frequency of lubrication inspections on historical data of
your installed equipment. Every actuator application has its own
effect on lubricants. Pattern lubricant inspections based on the
needs of your facility and its applications. The following schedule of
lubrication inspection should be followed until operating experience
indicates otherwise.
Gear Case: Inspect lubrication every 18 months or 500 cycles
— whichever occurs first.
6.1.3 Routine Inspection
The three primary considerations in a lubrication inspection are:
1. Quantity L120-85 operators are built to operate on the immer-
sion principle. The primary concern in the amount of lubricant is
whether the “worm” is totally immersed in grease.
2. Quality If dirt, water or other foreign matter are found during
lubrication inspection, the units should be flushed with a com-
mercial degreaser/cleaner such as Exxon Varsol 18 which is not
corrosive and does not affect seal materials. Repack unit with
fresh lubricant allowing room for grease thermal expansion.
3. Consistency Lubricant should be slightly fluid approximating
a standard NLGI-0 grade consistency or less. Thinners such as
Amoco WAYTAC 31 oil may be added provided the volume of
thinner does not exceed 20% of the total lubricant.
6.1.4 Factory Lubricants
Gear Case
• L120-85 is factory lubricated with an EP-0 lithium base grease,
suitable for temperatures from -20°F (-29°C) to + 250°F (+121°C).
Geared Limit Switch: Exxon Beacon 325 (no substitute).
6
Maintenance
25
Limitorque L120-85 Installation, Operation and Maintenance FCD LMENIM1202-00 – 11/05
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