Festo DZF - Structure of the Bearing Cap; Removing the Bearing and End Caps; Replacing the Piston Components

13 / 24Festo 7DZF / DZHb_en
4.3.1 Structure of the bearing cap
3
2
1
1 Bearing cap
2 Piston rod seal
3 Bearing
4.3.2 Removing the bearing and end caps
• Loosen the screws in the bearing and end caps (the rear bearing cap on
cylinders with through piston rod (S2 / S20)) and remove them.
• Pull the bearing and end caps (both bearing caps on cylinders with through
piston rod (S2/S20)) away from the cylinder barrel and piston rod.
4.3.3 Replacing the piston components
• Pull the piston rod out of the cylinder barrel.
• Check the cylinder barrel and piston rod for damage.
The entire cylinder must be replaced if the cylinder barrel (particularly the
bearing surface) is showing signicant damage.
• Unscrew the hex nut (the rear part of the piston rod on cylinders with
through piston rod (S2 / S20)) from the piston rod.
• Remove the piston components from the piston rod, noting the order and
orientation.
• Remove any residue of the screw locking agent from the threads of the
piston rod and hex nut (the rear part of the piston rod on cylinders with
through piston rod (S2 / S20)).
• Replace the components with those included in the set of wearing parts and
reassemble the piston components on the piston rod in the correct order.