brake vacuum

[Realize]

Hi Guys

How do I go about checking the brake vacuum system pipes etc on my 2ltr CU unit.
Where is the access to the servo end inside or outside? What should I be listening/looking for?

Cheers Jay

[jamesc76]

Dunno what your fault is but easy way to check is with the engine off, pump the pedal till its solid , then holding the brake on start the eninge the pedal should fall, proving the vacuum is working

[Realize]

Thank's for reply

Well I tried that and it did not work, pedal did not drop.
I have had a look at the vacuum hoses at the engine bay end and they look ok as far as I can tell.

What next?

I have a new master cylinder new clutch cylinder new pads and shoes I havealso changed the 2 flexy hoses to front calipers, and bled sysytem twice.

Jay

[sarran1955]

Hello,

Try it the other way,

Run engine, pressure on brake pedal.

Switch off..... The pedal should feel as though it is rising, then stop, and go back down a bit.

Pipe from inlet manifold goes through non return valve then off to the front of vehicle. Make sure all is in good order.

Cordialement,

[Realize]

Cheers Sarran

I will check that test out, do you know what/where it connects to at the cab end?
Do I need to get underneath the bus itself or dashboard?

Many thanks Jay

[jamesc76]

it connects to the servo, which is behind the master cylinder should see the connection there

[Realize]

Cheers James

I will have a look tomorrow.

Hope fully I can sort this out soon as I am not happy with the brakes at the moment.

Cheers Jay