2003 Polaris 3 PRO X Factory Service Manual, Page 253Get this manual
REAR SUSPENSIONTRACKTRACTION Apply thin film of oil onto the floating wear band and Oring and install the floating piston into the top of the shock body, positioning it below the counterbore(PICTURE 13)
Using the tool as handle, push the floating piston down into the shock body, being careful not to damage I.F.P wear band and Oring, until the value indicator knob comes in contact with the shock bodyThe piston should now be located correctly(PICTURE 14)