６．Maintenance and Check
６－１．Daily check
1) Is the operation smooth?
2）There is no abnormal change in piston speed and cycle time?
3）Is there any abnormality in stroke?
６－２．Periodical check
1）Is there any looseness of the cylinder mounting bolt and work?
2）Is the operation smooth?
3）Is there any abnormal change in piston speed and cycle time?
4）Is there any external leakage?
5）Is there any abnormality in stroke?
6）Flaws on the piston rod
7）Is drain of air filter removed periodically?
Check the above-mentioned items, and if any defect is found, take an appropriate measure. If there is unclear
point, consult SMC’s sales.
Warning
１） Perform maintenance in above procedure.
If the cylinder is handled incorrectly, breakage and operating failure of the equipments around the cylinder
may be caused.
２） Removal of equipment and supply and exhaust of compressed air
When the equipment is removed, after confirming the prevention for drop or run away of the work, the
cylinder is taken, cut off air and power supply for the system and exhaust compressed air from the system.
If the system is restarted, confirm the measures to prevent quick extension of the cylinder have been
taken.
６－３．How to replace packing
1．Disassembly of cylinder
①Cleaning of appearance
Wipe off the surface dirt to prevent intrusion of dust and foreign materials during disassembly.
Especially, please note it on the surface of the piston rod.
②Removal of switch rail【if the switch is mounted】
Loosen the hexagon bolt and remove the switch rail and switch rail pedestal .
③Removal of rod cover
Loosen the tie rod nut and remove the rod cover.
④Disassembly
Pull out the piston rod by holding a nut mounted on the piston rod end. At this time, take care not to mark
the internal face of the cylinder tube.
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