Flowserve L120-190 through L120-2000 - Manual (Page 24)

Limitorque ® L120-190 through L120-2000 FCD LMENIM1203-00 – 10/11
24
7.1 Lubrication
The L120 series actuators have a totally sealed gear case, factory-lubricated with grease. The gear case
can be mounted in any position.
a CAUTION: When the actuator is mounted in an upside-down orientation, the worm may not be
completely immersed in lubricant. Check lubricant levels before operating the actuator.
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 a small amount of lubricant is weeping at
start-up, remove it with a clean cloth. Once the equipment is operating on a regular basis, the weeping
should stop.
7.1.1 Lubrication Inspection
Inspect Limitorque L120 series actuators for correct lubrication prior to operating—particularly
following a long storage period.
Each application has its own effect on the actuator. The frequency of these inspections should be based
on the application and the operating experience. The following lubrication inspection schedule is recom-
mended until operating experience indicates otherwise.
For Gear Case, inspect lubrication every 18 months or 500 cycles, whichever occurs first.
During an inspection, consider the following:
• Quantity – Ensure there is enough lubricant so that the Worm and the Worm Gear are totally
immersed in grease regardless of the position.
• Quality – Inspect lubricant for dirt, water or other foreign matter. If any one of these is found:
1. Flush the actuator with a commercial degreaser/cleaner such as Exxon Varsol #18. This
degreaser/cleaner is not corrosive and does not affect the seal materials.
2. Repack the actuator with fresh lubricant, allowing room for grease thermal expansion.
7
Maintenance