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Hey guys, so I replaced the rear brush Mac valves and adjusted the air psi and the problem went away. Thanks again for your help.

No, this would only happen with compact cars.

No, I'm waiting on new Mac valves and a automatic drain valve for the air compressor. I'll be back to the site next week.

Darin, thanks for the reply. I will check on the Mac Valves for the rear brushes and the prox switches. I don't think the Rear brushes were wrapping around the rear of the vehicle on the front to rear pass so that might be my problem.

Hey guys I have a Ryko softgloss that's not measuring car lengths, on short cars the machine will fully extend to the rear and front brushes will get stuck behind the car. The photo eye x20 appears to be working fine ( turn on and off when I block it) but the overhead ultrasonic X0 light is...