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6. Troubleshooting
Trouble
Major causes
Countermeasures
Operation has
lost smoothness.
1. Shortage of
grease at the
sliding part of the
piston rod
- Apply the specified grease.
ＧＲ－Ｓ－０１０（１０ｇ），ＧＲ－Ｓ－０２０（２０ｇ）
2. Deformation of
piston rod
- Replace the cylinder with a new one.
When reinstalling the product, adjust the load and
mounting position.
3. Insufficient
pressure
- Supply appropriate pressure.
4. Operation at a low
speed outside of
the limit.
- Consult SMC.
Force has
decreased.
1. Air leakage from
piston seal
- Replace the cylinder with a new one.
2. Air leakage from
rod seal
- Replace the rod seal with a new one.
3. Decreased
pressure
- Secure sufficient pressure and review margin of
air supply source.
4. Insufficient flow
rate
- The resistance in the fluid path may have
increased due to deformation or foreign matter
entering the product. Perform repair or cleaning.
5. Incorrect
mounting position
of the product
- Mount in a proper position without any force
applied to the product.
6. Deformation of
piston rod
- Replace the cylinder with a new one.
When reinstalling the product, adjust the load and
mounting position.
7. Lubrication failure - Refer to the countermeasure for the trouble
“Operation has lost smoothness.”
Piston speed is
too fast.
1. Lack of speed
controller
- Use a speed controller suitable for the size of the
product.
2. Insufficient fine
adjustment of the
speed controller
- Select an adjustable speed controller to obtain the
required piston speed referring to the flow-rate
characteristics curve.
