Vehicle & Technical > Series Land Rovers

Strange brakes??

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Singlefin:

--- Quote from: JIM 2B on January 10, 2008, 15:11:20 ---Hi, i thought when the butterfly was closed it would increase the vacume for the servo as it has no where else to get air from :huh:

--- End quote ---

Exactly, so if it's not closing for whatever reason, that'd do it. I discovered this when I used the hand throttle to keep the engine at a *fast* idle when it was cold - butterfly stayed open, brakes didn't work. Cue excitement!

JIM 2B:
Thanks i take your point, its hard to say if it was stuck open at the time i was panicing so much  trying to stop it has the six cylinder engine with an su carb on it definatly closes ok as it has huge spring on the linkage at the carb! and would i not notice the engine revving if stuck open..

JIM 2B:
Hey Singlefin ...... :D :D i think you have it  :-k

i just remembered that the servo hose sometimes has appeared to have slightly colapsed under the vacume on tick over....... i now think that this could be the problem :D

when im brakeing and the butterfly has closed the vacum must be increaseing so much it is colapsing the pipe and the servo is only working for a short time until it runs out of vacume...due to the colapsed pipe... :-k
 this would be why it is unnoticable on the rolling road test as there is no engine braking and the vacume created is not enough to colapse the hose and shut off the vacume to the servo .....

Thanks for your help  :clap: :lol:

Range Rover Blues:
Either the servo isn't working or, if you are correct that it's reached it's full travel then you have either loose wheel bearings (not sure if it has the same effect on your drums as on disks) or a collapsing adjuster somewhere.

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