Answer
Sorry, do you mean, by "servo" the power brake master cylinder on the vacuum brake booster?
if so, this is not
a 10 minute job, and you must bleed the air from the brake lines. when you disconnect the brake lines, fluid leaks from the lines and the master cylinder. there is
a half pint in the reservoir. does fluid stay "uphill" just for you? not me.
if you buy a new master cylinder, it will not come with the plastic reservoir tank. this will need to be pried from the old cylinder, emptied of course, and pressed into the rubber seals of the new cylinder. air!!
if "servo" is the british word for something else...excuse me.
