WW 2.0 keeps rolling back

[stampedecarwash]

Hi all,
We got this WW2.0 by Coleman Hanna which keeps rolling itself back from the Home position when it finishes the wash. Of course the machine refuses to get any order until it goes back to the Home position again. We have changed the Drive wheel on both sides which both had worn out shafts. The machine is a lot more solid and has less rocking movement.
However still rolling back which is due to this rocking movement when it gets to the home position. Please see the video. The rocking makes the machine to gain momentum which makes it to roll back.
Is this a wheel issue? Should I change all the wheel at the same time instead of just changing one every now and then? Could be the railing not level anymore? Or maybe the gear box is back?

Thanks alot

 

[Greg Pack]

probably gearboxes. Jack the machine up and rotate the drive wheels should be minimal play

 

[stampedecarwash]

Thanks will do. Wondering what’s causing the machine to rock when it gets to Home position

 

[Greg Pack]

Thanks will do. Wondering what’s causing the machine to rock when it gets to Home position

Not sure, but if one wheel box is going bad or if the Lovejoy key has sheared or wallowed out the keyway on the wheel it can also do things like that. Also make sure your wall bearings and bearing on the top of the machine are good.