11IMO-218 EN - Issue 8/2020
• When air is supplied through Port B, the pistons come closer
and return to their home position, rotating the pinion CW.
5.2 OPERATING PRINCIPLE
(STANDARD MODE) FOR
SPRING RETURN– FAIL CW
• Port A is used as inlet.
• When air is supplied to Port A, the pistons are moved away
from each other, the springs are compressed, and the pinion is
rotated CCW.
• When the air is exhausted through Port A, the springs return the
pistons to the home position, rotating the pinion CW.
6. MAINTENANCE
6.1 LUBRICATION
• All the mountings, accessories and spare parts used or replaced
must be original from Neles.
• Use Neles recommended grease for greasing rack and seals.
• Apply the grease with soft brush.
NOTE:
• Carry out maintenance involving disassembling of actuator in a
safe indoor place free from dust, water.
• Ensure that air supply has been disconnected.
• Ensure proper lifting procedures are followed when moving or
lifting actuators.
• DO NOT use accessory, mounting holes on top of actuator for lifting.
• If actuator is spring return, ensure actuator is in the failed
position and springs are de- energized before disassembling.
7. DISASSEMBLY
Refer the view on page 22/23/24.
a. Loosen the lock nuts #13, and remove stroke adjustment
screws #5A and #5B, washers #10, and o-rings #23.
b. Loosen the cover bolts #9 on each end cap gradually in 1– 3 -
2 – 4 sequence. The bolts are long enough to retain the cover
connected to the body until the spring tension is fully released.
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