10 replies to this topic

[MT5716]

Hi i'm changing carburetors in my 1990 City E and the new manifold doesn't have the same fitting for the brake servo vacuum tube so i was wondering if my brakes will still work if i leave this tube disconnected or plugged?

[nicklouse]

you need to make a connection for the servo.

 

your brakes will be poor and could be classed a broken and unsafe which will invalidate your insurance.

[System]

What Manifold are you going for? I would think you need the vacuum on the system you ensure the brake system functions

[Dusky]

Your brakes work fine without the servo connected. They will not perform worse than any other minis brakes, you only need to press harder than with the servo connected. I even passed mot without mine connected.

[nicklouse]

Your brakes work fine without the servo connected. They will not perform worse than any other minis brakes, you only need to press harder than with the servo connected. I even passed mot without mine connected.

passing an MOT is not the same as a roadworthy car in the UK.

[Dusky]

Your brakes work fine without the servo connected. They will not perform worse than any other minis brakes, you only need to press harder than with the servo connected. I even passed mot without mine connected.

passing an MOT is not the same as a roadworthy car in the UK.

Servo less minis are road worthy too.

[Rapidmini59]

You could Loose the servo and fit the yellow twin circuit master cylinder.

If you want the servo then you will NEED to attach the vacuum pipe.

The choice is yours.

[Swift_General]

To the OP, think of the servo as a force multiplier. Without it the brakes will still operate, but you will have to press the pedal harder to achieve the same result.

If you retain the servo then you need to have it working and so connect the vacuum pipe to the manifold. Otherwise you will be in breach of C&U regs and it will (or should) fail an MOT.

As stated above you could replace the servo/master cylinder with the earlier non servoed tandem type, but I would suggest it would he easier just to get the servo working.

Edited by Swift_General, 14 June 2017 - 04:19 PM.

[Northernpower]

 

 

Your brakes work fine without the servo connected. They will not perform worse than any other minis brakes, you only need to press harder than with the servo connected. I even passed mot without mine connected.

passing an MOT is not the same as a roadworthy car in the UK.

Servo less minis are road worthy too.

 

It depends how you define roadworthy in this context. I know from personal experience a production mini fitted with a servo as standard will not be insured if the servo is disconnected or removed without informing the insurers and having it confirmed back by them in writing. You can remove the servo and replace the setup with a non servo master cylinder but you need confirmation in writing from the insurance underwriters. This has nothing to do with passing the MOT.

[Dusky]

 

 

Your brakes work fine without the servo connected. They will not perform worse than any other minis brakes, you only need to press harder than with the servo connected. I even passed mot without mine connected.

passing an MOT is not the same as a roadworthy car in the UK.

Servo less minis are road worthy too.
 

It depends how you define roadworthy in this context. I know from personal experience a production mini fitted with a servo as standard will not be insured if the servo is disconnected or removed without informing the insurers and having it confirmed back by them in writing. You can remove the servo and replace the setup with a non servo master cylinder but you need confirmation in writing from the insurance underwriters. This has nothing to do with passing the MOT.

And nothing with being road worthy (imo) but with insurance. Wich, ofcourse , should be notified of every important modification

[Swift_General]

Just to be clear, a fitted, but not working servo would both be illegal and cause an MOT failure. If removed and converted to utilise a non servo master cylinder then there would be no issue with this, other than it would of course have to be declared to the insurer.