Brake servo

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Radioactive Man

Active Member
Posts
212
Location
Stourbridge
Not really happy with my brakes, they work but don't really feel like they are working 100%.

Have checked the vac pump and that's ok, checked the servo to see if the pedal sinks a little when you start the engine, that the pedal stays ok if depressed and engine turned off etc and the servo seems ok.

Then I did a little bit of searching on here and found that sometimes you could get bubbles in the brake fluid if the master cylinder seals are suspect etc. all ok here too.

But I did notice that when the brake pedal is pressed the body of the servo seems to expand or balloon in the direction the piston is pushing. Is this normal, I don't really know but I want to get to the bottom of this.

Cheers for the help as always.

Ian.
 
Not really happy with my brakes, they work but don't really feel like they are working 100%.

Have checked the vac pump and that's ok, checked the servo to see if the pedal sinks a little when you start the engine, that the pedal stays ok if depressed and engine turned off etc and the servo seems ok.

Then I did a little bit of searching on here and found that sometimes you could get bubbles in the brake fluid if the master cylinder seals are suspect etc. all ok here too.

But I did notice that when the brake pedal is pressed the body of the servo seems to expand or balloon in the direction the piston is pushing. Is this normal, I don't really know but I want to get to the bottom of this.

Cheers for the help as always.

Ian.

does pedal sink when pedals pressed and held when engine is then started if not servo isnt working either due to it or no vac
 
Hi James,

Thanks for the swift reply.

Foot on pedal, start up and pedal drops down an inch or two then holds.

Engine running, foot on pedal, engine off and pedal stays at that level, doesn't sink.

Not sure what to think...
 
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