Dual Servo
Have been following this thread with interest and trying to find a decent schematic of a dual diaphragm servo. However if we just take the 'how stuff works' from Mike and knowing that the servo is not seemingly open to atmospere at any other source then it would appear that the air valve is not returning to it's rest position either by not enough free play in the brake pedal as has been suggested or that the air valve has a pin hole or some such allowing atmospheric pressure to act on the diaphragm. Are you sure that having the pedal connected to the servo actuating rod in the same manner as in the Marlin/Metro set up isn't preventing the air valve closing. My Cabrio was also assembled this way with the Metro servo but lined up perfectly with the new set up in the way Mike had intended.
I like others will be very interested in what MBM say
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