TM 10-3930-653-14&P REPLACEMENT OF UPRIGHT ROLLERS WARNING To replace or adjust the rollers in  the upright, follow  the procedures below using extreme caution.  Always block or chain the channels before working on  each  section.    It  is  recommended for safety’s sake that two people work together on upright repairs. 1.  To  remove  the  fork  carriage, lower the forks onto a pallet so the chains become slack. 2.    Remove  the  bolt,  in  the  top  center  of    the  front  lift cylinder,  that holds the chain guard in place. 3.  Lift the chains off the rollers. 4 - 194