9 . 1 . ▁ ▁Č D ▁Class ▁ 1 6 3 . 2 ▁and ▁some ▁Z SS K ▁Class ▁ 1 6 3 ▁locomot ives ▁were ▁re built ▁from ▁Č D ▁and ▁Z SS K ▁Class ▁ 1 6 2 . ▁This ▁was ▁caused ▁by ▁lack ▁of ▁fast ▁dual ▁system ▁locomot ives ▁as ▁only ▁one ▁Class ▁ 3 6 2 ▁locomot ive ▁was ▁built . ▁This ▁situation ▁solved ▁Č D ▁by ▁switching ▁the ▁bog ies ▁between ▁locomot ives ▁of ▁Č D ▁Class ▁ 3 6 3 ▁( same ▁as ▁Ž SR / Z SS K ▁Class ▁ 3 6 3 ) ▁and ▁Class ▁ 1 6 2 , ▁Ž SR ▁by ▁switching ▁only ▁the ▁speed - change ▁box ▁and ▁ax let rees ▁between ▁Class ▁ 3 6 3 ▁and ▁Class ▁ 1 6 2 . ▁After ▁that ▁procedure , ▁the ▁locomot ives ▁were ▁class ified ▁Č D ▁and ▁Ž SR / Z SS K ▁Class ▁ 3 6 2 ▁and ▁Č D ▁Class ▁ 1 6 3 . 2 ▁and ▁Ž SR / Z SS K ▁Class ▁ 1 6 3 . ▁ ▁History ▁ ▁The ▁locomot ive ▁was ▁produced ▁in ▁the ▁years ▁ 1 9 8 4 - 1 9 9 2 ▁in ▁four ▁series ▁of ▁ 2 0 , ▁ 4 0 ▁( 2 nd ▁and ▁ 3 rd ▁serie ) ▁and ▁ 6 0 ▁engines . ▁ ▁Because ▁it ▁was ▁a ▁slightly ▁modified ▁version ▁of ▁Č SD ▁Class ▁ES ▁ 4 9 9 . 1 , ▁there ▁wer en