Pax feedback to station staff (SBW) thatthe Front DT car train doors vibrate when closing and openi ng of train doors. Staff (WDL) checked and feedback no abnor malities on train doors. ~~~~~ Pax feedback to station staff (SBW) that     Check and observed #3610-B4 door was vibrating when open/close.Removed B4 door leaf manually open/close found RHS door was very stiff,suspect RHS door roller NG cause the door vibrate.LHS door check no annormal. 0020 to follow up #3610-B4 RHS door roller check. Done by Jack. 18/7/22 #3610 B4 RHS door roller check.     #3610-B4 RHS door roller rubber dislodged from bearing. Replaced ok.DLS,DLD,DCS,checked ok.Door mating strip-63.9mm.Door cyclic x10-ok.Door open/close static test ok.Door push/pull-6kgf. Done by Haikel/Syahmi. 18/07/22