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vt brake problem

Started by NZ VL com · 13 Oct 2008 · 36 replies

Preserved from CalaisTurbo. Original authors and dates are shown; archived members are not current Holdcom accounts. View original archive ↗

NZ VL comArchived member
have got the vt 2 pot caliper setup and im having trouble with them sticking.guys got any ideas as to what maybe causing this?
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-Kenny-Archived member
r they new calipers? if not slides arent siezed r they?
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12maneymArchived member
pm adam hes got these i think, he may have vx ss???
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NZ_BT1Archived member
Take your foot off the pedal heh heh heh....sorry had to say it Some original photos have not been recovered yet.
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NZ VL comArchived member
slides are ok, its just when they get hot they stick
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NZ EVLHSVArchived member
Have you got a 1" master?
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hsvhelArchived member
check the caliper retraction with a crow bar and the caliper off the car, this will confirm if there is pressure loss or lack of vacum, more likely they just need an overhaul.
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NZ VL comArchived member
ahha i might be the lack of vacuum as there is a hiss from the booster, Alex, no not got 1" master got 1 1/4" master
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NZ VL comArchived member
well i fixed the booster leak but they still stick
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NZ VL comArchived member
anyone got standard VT style brake hoses?i still cant find the problem and its annoying
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NZ VL comArchived member
so its been a while and i think i have found the problem....the boost pressure is causing them to stay on. has anyone had this problem as how do i fix it?
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calais3LArchived member
Dodgy vaccum check valve, where the hose plugs into the booster. worth a look.
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NZ VL comArchived member
any one else done this upgrade and had similar problems ok finally figured out that the vacum is pressing the pedal down by itself,how do i fix this? cant take vacum away as the pedal will be too hard to use
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NZ VL comArchived member
finally this setup works well Some original photos have not been recovered yet.
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-Kenny-Archived member
how much free travel hav u got, engine running?
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NZ VL comArchived member
why what you got? its not much but would like less but its a bit tricky getting the ballance just right, lot to long or not too short if you know what im talking about
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-Kenny-Archived member
u've changed the booster and master aswell right? if u havent set yourself enuff free travel the brakes will stick after a few depresses of the pedal. you want about 1-2 inches i would say
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NZ VL comArchived member
yeh i they were sticking with the vs/vt combo but worked really well, just that the vacum was making them stick, and what you mean about 1-2 inches?
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-Kenny-Archived member
i dont think that vacuum would be the problem There should be an adjustable pushrod between the booster and the master(bolt and locknut). It should be adjusted so that u have about 1 - 2 inches of freeplay at the pedal before the brakes take up. If the freeplay is insuffecient the piston in the master cyl will not retract far enough for the fuid to escape back to the resevoir
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NZ VL comArchived member
nah none of the vl or the vlt boosters are adjustible but you cleared that up thanks.why was it that when the vacum line was taken off(when brake were locked on) they released instantly? im sure that the vacume slightly makes the push rop push or rest in the m/c enought to hold then locked on .
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