sloppy loose arch m5 laserwash

[washup]

Hello

Our arch on the M5 is sloppy and has a fair amount of play in it, I was googling laserwash videos and here's one of likely a newer M5 (nice and tight in corners).
https://www.youtube.com/watch?v=kvU1xtHiSwQ

What have other owners done to fix up the slop that occurs over time? I look at the parts diagram exploded view and dont really see anything that should be allowing that much movement.
- rubber bumper is in good shape, do others replace it if its not cracked?
- our top swivels never seem to last more than 8000 washes before they also get sloppy (1100psi), anyone have a better brand or a better idea
- anyone have any torque settings for putting the assembly back together?

I read this post http://www.autocareforum.com/showth...-trolley-gear-laser-4000&highlight=loose+arch
but there wasn/t really a resolution to the problem

thanks

 

[DiamondWash]

Sounds like your gearbox is going out

 

[gearhead]

Where in the arch is the slop? You should be able to see pretty easily where it is if you grab it and move it. That should tell you what's worn.
The arch tension is adjustable @ the rubber bumper. Cant go too tight or else the arch wont return after an impact.