Train doors at cat front M2 door A4 notproven closed. TC open and closed few times - ok.Fault didnot recur at the next station. ~~~~~ Train doors at cat front M2 door A4 not     #2608 FC-083 Show saloon door A4 close operation.Check guide rail & J rail-ok-no FOD.Door mating: 64,DLD rubber cushion ok.DLS RED    MARK OK.Push/pull door 13kg.Found LHS door roller(main) dakage.Replace roller-ok.Push/pull door-4.5kg.Door mating 63.8mm.Door cyclic few times ok.Door timing open/close ok. Done by Saini/Asruddin/Zulq.  20/01/22