Well it wouldn't be a good idea to leave the post on the last page without the problem being solved.
There was a problem with the air tact opened it and there was another broken tube. One of the valves which connects the tubes to the outlets and inlets was not holding the tubing well, it was quite loose. Did some work with the spanner and replaced it.
The Airtact and the Graver Mach are working alright again, so glad it was just some problem with the tubing.
Thanks once again for all the suggestion and comments. The Engravers Cafe has such a wonderful helping spirit!
