Installing the bottom guide for AST 4200s

1. Put one paper towel into the cylinder. This ensures oil does not drip out during the assembly process.
2. Using a 47mm Klem block, clamp the cylinder upside down in the vice.
3. Close the compression adjuster completely.
4. Push the floating piston to the top of the guide.
5. With the compression piston in the cylinder, fill the guide with oil. It does not have to be completely filled. Push the entire assembly into the cylinder and screw the guide into place.
6. Open the compression adjuster and set your nitrogen regulator to 60psi. Insert the fill needle into the shock and open the valve. The pressure will push any air out of the lower chamber and into the main chamber. Depressurize the chamber again.
7. Remaining steps follow the normal filling steps previously described in the Service Guide.

Service Guides

• Checking nitrogen pressure and installing a new fill plug
• Removing the top guide and shaft assembly
• Disassembly of the shaft assembly
• Assembly of the shaft assembly
• Installing shaft assembly into shock (floating piston set)
• Installing springs on 5000 Series
• Installing Top Mounts on 5200s and 5300s
• Purging Air from 2 and 3 way 5000 Series Dampers
• Installing the bottom guide for AST 4200s
• Appendix A - Basic Servicing Tools Required