Brake problem after chassis swap??

[barefoot]

Since swapping the chassis went to take the car for an MOT and when started the brakes lokck on. On the jack each turned by hand fine and the car can be pushed no problem but once fired up the brakes lock on.

I am "pretty" sure we have put everything back as before and the servo was spot on before swapping the chassis has anyone any ideas that might help? It is at a friends garage for the MOT and they are struggling also....

[neilsjuke]

Got to be the brake servo Bypass it . and retry have you kept to the same type of fluid .

[ppnelan]

If it's a non-original Lockheed servo it could be that the air valve is stuck - see this thread (& others) for info: www.lotuselan.net/forums/viewtopic.php?t=2165

Matthew

[barefoot]

New fluid not sure if the same here are 2 engine pics when I got the car don't know what type of servo can you tell from the pics?

[elansprint]

I had a problem with the sprint every now & again when you pressed the brake pedal the brakes stayed locked on although it had stood unused for a long while before i bought it changed the master cylinder problem solved
Ian

[denicholls2]

Clogged or collapsed hoses will cause this behavior.

[ppnelan]

Yes that's a Lockheed servo - similar to eBay item no. 380020478804. The air valve is under the white plastic cover. A small 'shuttle' valve operated by the hydraulics is underneath this assembly. When it sticks, it can cause this problem. For possible solutions to the problem, see www.lotuselan.net/forums/viewtopic.php?t=12929

Matthew

[barefoot]

Thanks for the help I have bought the one off ebay ppelan posted by the time the garage has messed about with the original labour costs will be same as a new one so heres hoping thats what it is. Will keep you posted.

Kev