Maintenance Kit for Cylinders - For Hardened Pistons

**IMPORTANT **PLEASE NOTE - this kit is for HARDENED PISTONS only **

 Maintenence Kit for both cylinders. Includes the following:
(part numbers can be found on the exploded view diagram)

6 pcs upper cylinder urethane piston o-rings (found on either side of part #6)
6 pcs upper cylinder back check o-ring (goes on part#3)
6 pcs lower cylinder urethane piston o-rings (found on either side of part#16)
6 pcs lower cylinder back check o-ring (goes on part#12)
6 pcs black outer cylinder o-ring (goes on part#4)

1 pc upper cylinder small delrin spacer part#6
1 pc upper cylinder large delrin spacer part#7
1 pc lower cylinder small delrin spacer part#16
1 pc lower cylinder large delrin spacer part#17

Both the o-rings and the spacers are pare of the internal components of the cylinders. It is recommended that o-rings are replaced every 80-100 hours of operation (sooner if needed), and the spacers are replaced approximately every 3-4 times o-rings are replaced. Please see our How-To Videos (under the support tab) for instruction on how to remove cylinders and replace components.