John Bonnett
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| posted on 11/2/07 at 01:06 PM |
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Rollpinning Brake Balance Bar
Afternoon All
Two questions this time.
1 Is it possible to set up brake balance prior to SVA, to the satisfaction of the SVA man by either getting an MOT garage to set up 75/25 or/and in
addition to driving the car and checking that the back wheels do not lock before the front. I ask this because an un-roll pinned balance bar is an
automatic fail at SVA.
2 Where does the roll pin go? Damn fool question but there is a big gap between the bearing sleeve and the actual cross shaft.
Your help and answers gratefully received. Thank you in advance.
John
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MikeR
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| posted on 11/2/07 at 01:22 PM |
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why not accept you'll fail sva and set it up with them. I believe you drill one of the locking nuts either side through the bar and put the pin
in there.
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John Bonnett
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| posted on 11/2/07 at 01:31 PM |
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Mike, thank you for that. Bearing in mind that there are sure to be other points on which the car will fail first time I thinks your's is good
advice particularly if we can set it up during the SVA test.
Thank you once again
John
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nitram38
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| posted on 11/2/07 at 01:36 PM |
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I did something that passed ok, but under scrutiny might not have.
I put 2 half nuts on the bar, so it could still be adjusted using spanners, but I also put a nut each end which were roll pinned.
The regulation does not say that your bias bar cannot ever be changed, it just says that it must not be adjustable beyond the front bias worst
case.
In other words, as long as your brakes bite at the front before the rears, you will pass.
You can test this yourself on a dirty or gravelly road so you can watch the fronts lock first.
My tester at Mitcham, just tested the brakes on the rollers (I had the bias right over to the fronts) and took a quick look to make sure it was
pinned. He did not want to loosen the 2 half nuts and shift the bias over to check the other extreme.
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BenB
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| posted on 11/2/07 at 03:33 PM |
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If you took a battery powered drill you could (as long as Mr SVA was in a good mood) drill it and pin it there once you'd done the brake test to
his satisfaction.....
They'll usually give you a little tinker time at the end to fix anything that's cropped up.
Of course if you're unlucky like I was at the first SVA test and your examiner has got the area supervisor there leaning over his shoulder and
auditing SVA tests you'll probably not get this chance. Then again, if the supers around, its a fail anyway!!! Seriously pedantic picky git!!!
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John Bonnett
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| posted on 11/2/07 at 04:07 PM |
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Thank you Nitram and BenB. I think I'll expect and accept the fail and if that is the only item it fails on, I shall be very well pleased.
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RazMan
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| posted on 11/2/07 at 06:30 PM |
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quote:
Originally posted by John Bonnett
Thank you Nitram and BenB. I think I'll expect and accept the fail and if that is the only item it fails on, I shall be very well pleased.
That was my philosophy too John, so I left my bias bar totally 'unlocked' and even loose so that I could just adjust it as required to get
the right bias.
The one thing that I didn't expect .... it passed without any comment!
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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John Bonnett
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| posted on 11/2/07 at 06:54 PM |
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quote
The one thing that I didn't expect .... it passed without any comment!
Great stuff, Raz. I've already spoken to my SVA man and when I told him I had a balance bar he just said "Well you'll fail
then", no argument so I doubt if I'll have your luck. Never mind.
Cheers
John
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nitram38
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| posted on 11/2/07 at 07:10 PM |
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The moral there is not to tell the examiner !
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