I just took my car for its first drive and there is no pedal feeling at all, the brakes work really well though. whats causing this? I dont need to put hardly any pressure on the pedal to stop the car, and i dont really like it.
no feeling in the brake pedal.
Started by
makka
, Mar 12 2006 02:23 PM
14 replies to this topic
#1
makka
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Posted 12 March 2006 - 02:23 PM
#2
rodomo
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Posted 12 March 2006 - 02:30 PM
Just touch the pedal and its all there at once?
Sounds like the reaction disc in the booster.
Datto is the man to talk to.
RACV MAN
Sounds like the reaction disc in the booster.
Datto is the man to talk to.
RACV MAN
Edited by rodomo, 12 March 2006 - 02:31 PM.
#3
makka
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Posted 13 March 2006 - 01:56 PM
yeah sorta, it feels like there is nothing there, just like the pedal is connected to a light spring. so that would require a new booster?
#4
_UCV80_
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Posted 13 March 2006 - 05:51 PM
took my rana out for its first drive the other day....
iv got this same problem... and it doesnt feel safe!
slowly push down then WHAMO! everyone gets thrown forward..
how do we fix our brakes?
,Nathan
iv got this same problem... and it doesnt feel safe!
slowly push down then WHAMO! everyone gets thrown forward..
how do we fix our brakes?
,Nathan
#5
FastEHHolden
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Posted 13 March 2006 - 06:17 PM
Have you have had your booster apart? Sounds to me like the reaction disc too.
#6
_CHOPPER_
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Posted 13 March 2006 - 06:39 PM
Apparently the booster has a very large powerful spring inside that aims for the head if you try to dis-assemble it in the garage. Check with dattoman before reaching for the spanners.
#7
rodomo
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Posted 13 March 2006 - 07:30 PM
I might be wrong here but this is something to try.
Apply your brakes hard (stationary not driving) and slip your foot off to the side so the pedal comes back quick. Do that a few times and see if it helps.
From memory something in the reaction disc area sticks if left sitting. Obviously this a temporary fix and I am only suggesting this for the sake of diagnosis. Best to have the system checked.
RACV MAN
Apply your brakes hard (stationary not driving) and slip your foot off to the side so the pedal comes back quick. Do that a few times and see if it helps.
From memory something in the reaction disc area sticks if left sitting. Obviously this a temporary fix and I am only suggesting this for the sake of diagnosis. Best to have the system checked.
RACV MAN
#8
_jabba_
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Posted 13 March 2006 - 08:46 PM
I also have the same problem with my hq, pedal is very light and i have to move the pedal a fair way then the brakes seem to work fine. Im going to try re-bleeding them and see what happens.
#9
_UCV80_
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Posted 13 March 2006 - 09:27 PM
mine were freshly bleeded. bout 2hours before driving. bit hard to ware in my new pads when its like this haha.
i never had my booster appart. iv been told never to touch the boosters as there hard.
,nathan
i never had my booster appart. iv been told never to touch the boosters as there hard.
,nathan
#10
dattoman
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Posted 13 March 2006 - 10:02 PM
Have you had the master cylinder off though ?
Does sound like a missing reaction disc in your case
Does sound like a missing reaction disc in your case
#11
makka
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Posted 15 March 2006 - 10:12 AM
yeah the master was off, I have a new master now. how would the reaction disc get out of the booster though? does it go in between the master and the booster?
#12
rodomo
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Posted 15 March 2006 - 03:07 PM
No it doesn't go between master and booster. It is in the booster. It is like a "feeling" thing that tells the booster what sort of boost to give under certain brake applications. If you have bought a second hand booster to fit this may be the problem and the reason it was for sale. Or it may be sticking due to residue on the faces of the valve through lack of use and age.
RACV MAN
RACV MAN
#13
FastEHHolden
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Posted 15 March 2006 - 07:09 PM
I thought it was possible for it to fall out? don't they have a short push rod and the disc is behind it?
It has been 10 yrs since I rebuilt one..might be time to revisit this.
It has been 10 yrs since I rebuilt one..might be time to revisit this.
#14
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Posted 15 March 2006 - 10:56 PM
It falls out of its location
Not out of the booster
Look for it here
When the master cylinder is pulled forward to replace it the rod may come forward with it and the disc falls out of its hole
Then when you put the master back you have excessive travel
When you drive after the travel you have touchy brakes.
Pull the master forward...... remove the front seal and pushrod
Shine a torch into the booster. If you don't see a rubber disc in the centre of the booster this is your problem
Go buy a new one and refit it into the booster
To refit it put a dob of rubber grease on the fat end of the rod..... to stick the disc to it while you put the rod back in. Don't use normal grease or petroleum based products or silicone to do it.
Not out of the booster
Look for it here
When the master cylinder is pulled forward to replace it the rod may come forward with it and the disc falls out of its hole
Then when you put the master back you have excessive travel
When you drive after the travel you have touchy brakes.
Pull the master forward...... remove the front seal and pushrod
Shine a torch into the booster. If you don't see a rubber disc in the centre of the booster this is your problem
Go buy a new one and refit it into the booster
To refit it put a dob of rubber grease on the fat end of the rod..... to stick the disc to it while you put the rod back in. Don't use normal grease or petroleum based products or silicone to do it.
#15
makka
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Posted 16 March 2006 - 12:31 PM
cheers, I will have a look when I get home friday.
cheers
cheers
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