Train doors not proven closed. Opened and closed few times - no avail. Staff(DBG) assisted to push c lose B3 door to close. ~~~~~ L3 1627 B3 door no FOD was found. Performed 20mm door gauge test - OK. Door open/close cyclic test 30x - OK, no fault occurred. D/L ER & fault trace record - Done.  Sarma/Anand. 05/07/2020. L3 1627 before cleaning J-rail, RHS 5.6kgf & LHS 6.6kgf. After cleaning J-rail, RHS 4.8kgf & LHS 5.8kgf.  Sarma/Kana. 05/07/2020.