SUCCESS!! ...or at least it seems...
Switch arrived from Emmotts today. Got the old one out in-situ... It has 36mm flats on it, but not enough clearance between the switch and pump bodies to get a big socket on it. I just about managed to get it initially loosened with a Viscous Fan spanner, but then had to undo the pump mounts to move it around and get enough of a turn on it to remove it completely. Be aware that the switch body is milled Aluminium and is easily damaged by a steel spanner! Had shedloads of brake fluid come out, so a small thin tray of some sort underneath it would have been a good idea... The absorbent cloth I stuffed under there was quickly overwhelmed! Thankfully, the brake fluid followed a path that took it away from the top of the air spring, hoses, anything rubber, etc so hopefully I got away with it... Just had to thoroughly clean it off the bodywork.
Now, pump runs as soon as the ign is turned on, pressurises the system and stops after a seemingly sensible time. Brake pedal is nice and firm too. Won't get a chance to road test it until the Nagger get back from work... Not too keen on having the Clarkylets in the car until I've proven the brakes work!
