4 replies to this topic

[Lewis Bailey]

mini city E:
1984:
i am uprating my drum brakes to discs ready for my 1275GT to go in and i know i need to fit a remote servo (i knows its dumb) but how do i fit it ??:

[Guess-Works.com]

You don't "need" to fit a servo, infact I fitted a brand spankers one when I converted my '72 from drums to disks and after about a month I took it off as there was a total lack of feel from the brakes...

But...

The remote servo is fitted to a bracket which then bolts to the o/s wing, with the 'point' of the servo directed towards the front of the car, angled upwards at about 20/30 degrees.... essentially the end of the servo should be not far from the bracket where the bonnet stay locates...

It is then piped in between the master cylinder and the "T" piece on the bulkhead for the front/rear split...

Then you need the vacuum line from the inlet manifold to the servo with a one way valve.

Don't put a remote servo on a dual braked system as it can lead to dangerous brake imbalances...

[Guess-Works.com]

Just re-read your post... '84 mini... you will can/should NOT fit a remote servo... you need to change the dual master for a complete servo unit/master cylinder from a later model, if you want a servo at all...

[Ethel]

An '84 mini should have the dual circuit master & pedals that will work fine with discs as it is. You can fit a remote servo to just the front circuit, the brake regulator won't know if the pressure is coming from a servo or a heavy right foot &will cut off the rear brakes at the same pressure.

[Guess-Works.com]

If you fit a servo to the front circuit only, it will only act on the front circuit, there is no possible passage of fluid/pressure from the front to rear circuits which is why it's called a dual circuit system and has a Dual master.. This is why you should only fit a remote servo onto a single line system or before the split in a dual circuit... bit difficult to do when the split is in the master cylinder...

The later servo models, the dual master cylinder is part of the servo.

Under light/medium pressure on the brake pedal, the servo will be doing the braking, therefore all braking effort is at the front of the car... with very little, or no braking effort at the rear...

this is a rather dangerous situation to be in on the road.