Mod Details
PremiumNo Difficulty
Mod ID1855
Creditevilution
For
Linkhttps://www.evilution.co.uk/mod/roadster-brake-vacuum-booster.htm Copy to ClipboardWhat Is The Brake Vacuum Booster?
I have bad news for you. You aren’t as strong as you think you are. You simply can’t create enough power in 1 leg to stop a car.
You would need a brake pedal 1 metre long for you to be able to apply the same amount of braking force with 1 leg as you get with the addition of a brake vacuum booster.
How Does It Work?
It’s a canister containing a diaphragm. On 1 side is your brake pedal and on the other side is a vacuum that helps you push the brake pedal by pulling it from the other side. The vacuum either comes from the engine in ICE cars or a separate pump in EVs. The vacuum pre-loads the brake master cylinder so it assists you when you do press the brake.
What Can Fail?
The diaphragm inside can split. The seal between the vacuum booster and the master cylinder can fail. The vacuum pipe seal can fail.
Where Is It?
Open the bonnet, remove the storage bucket. Find the brake fluid reservoir and look back from there. It’s the big black disc.
Removal
Disconnect the master cylinder. Post yourself upside down into the driver’s footwell and look at the top of the brake pedal. There’s a clip and pin that holds the vacuum booster to the brake pedal. You need to remove the clip.
It’s fairly easy, Lift up the tab and slide the clip over until it pops off. Don’t lose it. With the clip off, slide the pin out.
Look at the bulkhead behind the brake pedal and you’ll see 4x 13mm nuts.
Remove the nuts and you’ll be at this point. Looks like a Dalek’s penis.
Go back to the front of the car and find the vacuum pipe.
Pull the hose out.
The vacuum booster unit can now be removed from the car.