3644 B2 door closed too fast, 3644 Obsta ~~~~~ 3644 B2 door closed too fast, 3644 Obsta     Checkede & found #3644-B2 door high resistance when opening & closing.Removed both door and service rollers,J-rail & door guide rail.After servicing do pull/push gauge tested ok.Carried out door cyclic tested ok. Done by Kumar/Jack/Koh. 13/01/20