Flowserve LY Series Limitorque - Manual (Page 45)

45
Limitorque LY Series: LY 1001, LY 2001 and LY 3001 FCD LMENIM1501-00 – 11/11
flowserve.com
7.1 Lubrication
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 is weeping at startup, 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 LY series actuators for correct lubrication prior to operating—particularly following a
long storage period.
Each application has its own effect on the actuator and the frequency of these inspections should be
based on the application and the operating experience. The following lubrication inspection schedule is
recommended 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 – LY operators are built to operate on the immersion principle. Ensure there is enough
lubricant so that the Worm is 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.
• Consistency – Ensure the lubricant is 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.
7
Maintenance