I use an exercise bike, not an actual bike.
Mainly to burn more calories without taking a pounding.
But I also wear 1lb gauntlets on my hands and
have them moving in the same motion as when I run.
I have noticed that hills don't bother me as much as they used to.
And my arms are seem stronger and during hard runs I can pump them without straining.
So yes, cycling has helped my running.
Though it would be more accurate to say it helps my jogging.