iiyama
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| posted on 14/9/06 at 08:26 PM |
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Hydraulic handbrake
Are these SVA compliant?
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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wilkingj
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| posted on 14/9/06 at 08:31 PM |
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I dont think so, it has to be mechanical.
not 100% sure..
1. The point of a journey is not to arrive.
2. Never take life seriously. Nobody gets out alive anyway.
Best Regards
Geoff
http://www.v8viento.co.uk
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nitram38
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| posted on 14/9/06 at 08:34 PM |
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No, as already said, must be mechanical.
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DorsetStrider
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| posted on 15/9/06 at 03:21 AM |
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I've just been checking a few back issues of PPC and the SVA manual. I can't find anywhere where it says handbrakes must be mechanical. It
does say that the handbrake system MUST be entirely seperate from the footbrake.
Can anyone confirm what the current regs are?
Who the f**K tightened this up!
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nitram38
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| posted on 15/9/06 at 05:46 AM |
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Section 16.1 Parking Brake:
using a control which is independant of the service brake, and capable once applied of being maintained in the 'on' position solely by
mechanical means.
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iiyama
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| posted on 15/9/06 at 06:15 AM |
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thats that idea out the window then!
If its broke, fix it. If it aint broke, take it apart and find out how it works!
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nick205
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| posted on 15/9/06 at 10:38 AM |
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I always fancied ditching the handbrake altogether and fitting a line lock device to the rear brakes - would make the tunnel much tidier and more
comfortable as an armrest 
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RichieC
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| posted on 15/9/06 at 01:08 PM |
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Nowt to stop you having both cable and hydraulic like most rally cars do. The cable is there for SVA/MOT but you have the benefit of a fly off
hydraulic handbrake the rest of the time.
Also, bear in mind some builders have succesfully used solenoids etc with a simple on off switch which again cleans up the tunnel nicely.
Rich
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DarrenW
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| posted on 15/9/06 at 01:38 PM |
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Std hydraulic handbrake kits dont lock on. In theory if you fit one that has a completely independant fluid system to the main brakes and will ratchet
on then you could get away with it. It then begs the question why bother though as you may need seperate calipers / cylinders etc.
I think part o fthe idea is if your main hydraulic system fails at least you have something to hold the car at rest once you stop. Also if you have a
fluid system failure when parked up at least the mechanical handbrakes will hold the car stationary.
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DIY Si
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| posted on 15/9/06 at 03:22 PM |
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There's nothing stopping you having a hydraulic handbrake, it just needs a mechanical action to hold it on, ie a 'normal' handbrake
lever with a hydraulic cylinder should be fine. It would work nicely on something like the BMW rear discs which have (had?) a seperate drum for the
handbrake.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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RichieC
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| posted on 15/9/06 at 05:11 PM |
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Theres no doubt a ratchet would hold the handbrake lever on and consequently the master cylinder pressure, but SVA argue a loss of pressure through
whatever means would render the brake useless.
As such youll need a cable backup as a minimum to satisfy that requirement.
Rich
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coozer
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| posted on 15/9/06 at 06:25 PM |
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If the cable broke (as they do!) that would also leave the brakes useless.
Sounds like swings and roundabout time...
1972 V8 Jago
1980 Z750
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DIY Si
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| posted on 15/9/06 at 06:55 PM |
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I think it would be very open to interpretation. As above, it says it must be held on by by mechanical means. Doesn't say what form that
should take, so it could be the rachet on a hydraulic system, or the same on a cable system.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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RichieC
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| posted on 15/9/06 at 08:02 PM |
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I dont disagree, but youd not be the first person to fail SVA for not having a cable.
Their rules, their ball. Far better not to risk a benfit of the doubt issue. Fitting a cable is hardly much of an inconvenience anyway [subject to
most hydro-mechanical calipers] then please yourself after SVA.
[Edited on 15/9/06 by RichieC]
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caber
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| posted on 15/9/06 at 08:28 PM |
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I have an under dash umbrella handle type handbrake lever off a Lotus Elan that I am planning to use. It should fall within the safe area behind the
steering wheel Any reason this won't get past SVA? This also gives a clean tunnel!
Caber
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Peteff
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| posted on 15/9/06 at 08:46 PM |
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Fitting a cable is hardly much of an inconvenience anyway [subject to most hydro-mechanical calipers] then please yourself after SVA.
Till you go for MOT. They also require that you have a cable operated alternative system as backup. Local station is a 4x4 racer and he used to let
the rally boys get away with a hydraulic handbrake with pushbike cable for show but I think those days are now long gone. The umbrella handle should
be o.k. as long as it's efficient
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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RichieC
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| posted on 16/9/06 at 09:10 AM |
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quote:
Originally posted by Peteff
Till you go for MOT. They also require that you have a cable operated alternative system as backup. Local station is a 4x4 racer and he used to let
the rally boys get away with a hydraulic handbrake with pushbike cable for show but I think those days are now long gone. The umbrella handle should
be o.k. as long as it's efficient
Sorry yeh should have said SVA/MOT time like my original post:
quote:
Originally posted by RichieC
Nowt to stop you having both cable and hydraulic like most rally cars do. The cable is there for SVA/MOT but you have the benefit of a fly off
hydraulic handbrake the rest of the time.
Rich
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HAL 1
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| posted on 16/9/06 at 04:40 PM |
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mate of mine failed his MOT years ago with hydraulic handbrake, he was told it had to be independent and mechanical so it could be used as
'emergency' brake, that was in the last century.
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