I don't know why the P-7 was giving a heavy jerk to coaches. Whenever the train got pulled or being stopped, it had to have a jerk. Is it due to hybrid-LHB?
Jerk might be the problem of coach coupling. I don't consider any effect of P-7 here. It is advised by Railway to LP that they should start the train in very little jerk otherwise the coupling may demage.
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