The 'E' Type Forum

Thank you for your reply. I agree totally with your description of the operation, but my concern is that if there is a leak through the centre of the diaphragm (where the rubber sits in a circular groove) then when air is admitted to the rear chamber it will pass into the front chamber and the press...

Car Series 2, 2+2, 1969 LHD. I noted recently that just after the engine was switched off the brake vacuum dropped quite quickly. Eventually I found three leaks, the check valve, the joint between the reaction valve and the master cylinder body and the rubber pipe to the brake servo. To aid finding ...