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Sept 27, 2012 21:07:18 GMT
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Chaps
This may be a stupid question but here goes.
I bought a car from a dealer who had it MOTd. To me the hand break is wibblepoo and wouldnt keep the car from rolling on even the slightest of hills.
But because its an auto, whilst in park its all good...
So is a hand brake tested on an auto?
Cheers
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Current retro - 1996 Alfa Romeo GTV / Daily - 2016 Nissan Qashqai Previous retros - Prelude, Integra, XR2s, XR3s, Orions, CRXs, Sylvia S12, S13, Pulsar, ZX 16v, 205 Gti, MX5, MR2 etc
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Sept 27, 2012 21:17:02 GMT
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Yes, handbrake is still tested on autos. You need a minimum of 16% efficiency to pass (25% on cars with single circuit brakes).
(16% is roughly the same as holding on a 1 in 6 slope)
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To get a standard A40 this low, you'd have to dig a hole to put it in
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Sept 27, 2012 21:37:09 GMT
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thanks mate - does it need to be within so many clicks? I yank mine all the way up and it has very little hold..
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Current retro - 1996 Alfa Romeo GTV / Daily - 2016 Nissan Qashqai Previous retros - Prelude, Integra, XR2s, XR3s, Orions, CRXs, Sylvia S12, S13, Pulsar, ZX 16v, 205 Gti, MX5, MR2 etc
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Sept 27, 2012 21:38:49 GMT
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This brake efficiency percentage - is it basically horizontal force of the brakes VS overall weight, or weight over that axle? Is the weight measured by the brake machine or off a chart? I've had cars with functionally real curse word handbrakes pass with flying colours, and cars with really good ones fail. My Lupo had a cracking handbrake, new cables and mechs and pads all adjusted to VW specs from ELSA and it failed on insufficient reserve travel" but it would lock the back wheels up from speed at 4 clicks
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Last Edit: Sept 27, 2012 21:44:34 GMT by cobblers
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Sept 27, 2012 21:49:14 GMT
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Percentage is derived from brake force at wheels divided by vehicle weight. Some automated test lanes weigh the car, the computer provides a value from VSI for most modern stuff, kerb weight from the VIN is also acceptable. If weight is unknown you test for efficiency with a decelerometer (tapley meter) instead.
There is no requirement for the lever to operate in a certain number of clicks as long as there is reserve travel, handbrake should only be applied to the point where a pass is achieved.
Oh also, there must not be side play in the lever bad enough to make the lever slip off the ratchet.
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To get a standard A40 this low, you'd have to dig a hole to put it in
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Sept 28, 2012 7:21:54 GMT
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if its that bad -contact VOSA & get them to check it. That way you find any other 'issues' that were passed -and strengthen your hand against the vendor -either as a return ,or compensation.
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bl1300
Posted a lot
Posts: 1,678
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Sept 28, 2012 7:27:25 GMT
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a 16% effieciency handbrake in the real world feels really curse word! My van gets 35% on the tapley at 7 clicks. I had to shorten the Triumphs handbrake cable as all though I could get 25% on it the lever ran out of reserve travel.
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Current fleet.
1967 DAF 44 1974 VW Beetle 1303s 1975 Triumph Spitfire MkIV 1988 VW LT45 Beavertail 1998 Volvo V70 2.5 1959 Fordson Dexta
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