Castle AT-5 - Manual (Page 21)

CASTLE, INC AT‐5 OWNERS MANUAL V2.1 Page 21 of 26
1. Turn off the air and remove the airline for the cylinder to be rebuilt. The line is connected
to the cylinder by a push-in fitting. Push the outer ring in as you pull the airline out.
2. Loosen the tension screw on the side of the Cylinder
Channel.
3. Remove the (4) Wear Strip screws on each side of
the Cylinder Channel and remove the complete
assembly from the arm.
4. With the cylinder off the arm remove the Snap Ring
(#2) on Appendix A
5. Remove the piston (#1).
6. Remove the Pem Nut (#10) and center screw (#4).
Fig 25
7. Remove the Large Washer (#5) and the Gasket (#6).
8. Remove the Piston Assembly (#17, 18, 19) from the Elbow Fitting (#20).
9. Replace the Buna-N O-Rings with the new ones from the rebuild kit and apply the
enclosed lube.
10. Reassemble the cylinder reversing steps 4 through 8
using the replacement parts included in your rebuild
kit (K08004) .
11. When tightening the center screw, be sure it is left
JUST LOOSE enough to allow air flow from the elbow fitting into the cylinder sleeve. It
should be tightened very tight but not ‘death grip’ tight.
Fig 26
12. Slide the cylinder(s) back onto the arm.
13. Replace the cylinder assembly including the cylinder channel onto the arm. Replace the
wear strip screws and tighten.
14. Tighten the bracket tension screw until the desired slide resistance is reached.
15. Reconnect air to the regulator and test the rebuilt cylinder. The piston should come down
and retract quickly. The lever action should be stiff, but not take a full body lean.
16. If the arm does not roll smoothly refer to Section 6.1 Adjusting the Arm Bearing.