Vehicle & Technical > Series Land Rovers

Strange brakes??

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JIM 2B:
Its a strange one for sure, has anyone any ideas??  800miles ago i have replaced the master cylinder all the brake pipes / slave cylinders with new items and fitted stainless flexi pipes.  :)

 Bleed the system no problems.... then used on the road for 600 miles no problems then when decending a hill one day and braking to stop from 40mph at about 30mph when i depress the brake peddle a little more it seems to be solid and has not reached full travel as though some thing is wedged under the peddle.

I press even harder  :shocked: with no affect so i lift my foot thinking to pump the brake! and again it starts to brake again and then becomes solid again with both feet on the pedal pressing hard and a fast heart beat it eventualy stops..  :shock: scary for sure... the brakes where deffinatly not slowing me down  :huh:

I have looked at the peddle addjustment and it is correct there is no fluid leaking from anywhere and the slave cylinders and shoes are all ok.. i have bleed the system again no air in system.. :?

This has only happened on two occasions going down a hill and the brakes work perfectly fine at all aother times even locking the wheels up :lol: in fact i would say they work better than i expected.

But im worried that this may happen again in the wrong place at the wrong time when i need them most :shocked:

I have had the brakes tested on a rolling road at my mates truck depot and they are perfect :? no problems and they appear to still be working as good as ever...

Has anyone ever heard of or had an intermitant falt on a master cylinder piston jamming :? as this is the only thing i can think of???????????? :|

electricbluebadger:
Are they servo assisted??

Cheers Steve

JIM 2B:
Hi yes its servo assisted it is a remote servo and the servo has also been fully serviced with new seals etc  :)

umm could it be the remote piston sticking?????

Singlefin:
Could it be the butterfly in the air intake not closing? That'd mean there's not enough vacuum for the servo to work.

JIM 2B:
Hi, i take it you mean the butterfluy in the carb.. the carb definatly shuts off ok and 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:

its as though the peddle has reached its full travel and is solid but the brakes are only half on :? but after stoping and then re trying the brakes they are fine until it randomly happens again its quite frightening :shocked: :shocked:

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