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by severak_cz 701 days ago
There was similar scheme of percussive maintenance with ČSD Class M 152.0 [0] railcar. It suffered from engine stall problems until some train driver kicked into certain spot of train undercarriage out of frustration and found by accident it fixes the problem.

[0]: https://en.wikipedia.org/wiki/%C4%8CSD_Class_M_152.0