Scania APS Dryer Rebuild

Hi Guys,
My Nextgen G series is having issues with air pressure it jumps between 1 and 65bar on all 3 tanks, been told that its been a common problem in Australia anyway.
They sold me a kit 2958113, has anyone installed one? any suggestions? apparently you can do it with the dryer in place.
Cheers,
Nick

Had a problem with mine stopped building air completely, Called Scania lifeline out (Swindon) Fitter said any dryer completely knackered…Called my dealer who said probably vent valve on the bottom of the dryer (Plastic Large nut)They dropped it out fitted new all has been good since about Ā£34 for the valve. I believe its easy to get to on your model but a bit job on a low bumper model.

65 bar?!
Is the kit a new sensor by any chance?