Flowserve Mechanical and Hydraulic - Manual (Page 24)

Mechanical and Hydraulic Overrides FCD LFENIM0004-00-AQ – 05/15
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Maintenance Instructions
Mechanical and hydraulic manual overrides of LFPS heavy duty actuators are designed to offer the greatest ease of operations of
assembly, disassembly and maintenance. Maintenance and disassembly do not require special equipment.
Mechanical and hydraulic manual overrides of LFPS heavy duty actuators are designed for emergency use in the case in which the
pressure supply medium is not available.
If the actuator operation happens infrequently, it is recommended to perform the following steps periodically:
1. When it is possible, carry out a few opening and closing operations by manual overrides, checking that the actuator operates
correctly.
2. Check the paint coating. If some areas are damaged due to accidental events, retouch them according to the paint specifications.
3. For the Hydraulic Override, ensure there are no leaks in the hydraulic connections. If leaks are present, tighten the pipe fittings.
4. For the Hydraulic Override, it’s suggested to check the level of the oil in the tank using the proper level indicator installed near the
lever of the pump. See Figure 17.
5. For the Not-Enclosed Jack Screw Override, clean the screw, removing sand, powder, and any other solid particles before
operating it.
a CAUTION: Never apply any type of lubricant or grease on the threads of the Not Enclosed Screw in order to avoid deposits of
sand, powder and any other solid particles and to seize up the manual overrides mechanism.
Figure 21 – Detail of Not-Enclosed Jackscrew and Hand Pump Assembly
Not-enclosed
screw
Level Indicator