November 2015
Installation, Operation and Maintenance Manual
RGS011110-3 Rev. 0
13
Section 4: Maintenance
Maintenance
5.
Remove the cylinder. Be careful not to damage the internal surface of the
cylinder as this will compromise the piston’s ability to seal.
Figure 9
6.
Replace the piston O-ring and wiper ring as needed. Be sure to lubricate the new
O-ring and wiper ring with the correct Bettis approved lubricant if they are
replaced.
Figure 10
Piston O-ring
Wiper Ring
Piston Bolt
7.
Inspect the piston bolt for any wear or corrosion (pitting, cracking). If either
cylinder seal is deformed or cut replace it. If excessive wear or corrosion is
apparent a new actuator or actuator components may be necessary.
8.
Lubricate the internal surface of the cylinder with a light coat of the correct
Bettis approved lubricant and slide the cylinder back over the piston and into the
cylinder seal groove of the base plate, taking care not to pinch the piston O-ring.
