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Old 26th January 2016, 08:48 AM
metal matt metal matt is offline
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Join Date: May 2009
Location: pembrokeshire
Posts: 214
Default Brake balance bar

I'm after a bit of advice. As most kit car have a bias balance bar on the brake yet the IVA says they need to be permanently locked. How have you gone about this and what will pass the IVA?

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Old 26th January 2016, 09:03 AM
TalonMotorFabrication TalonMotorFabrication is offline
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Join Date: Jun 2011
Location: Southminster Essex
Posts: 260

Make sure you are reading the current version of the IVA manual, I remember reading that it had been amended to read 'locked in a set position' in which case you can do this with washers between the bearing and each clevis then more washers with a plain nut on each end. Lockwire the nuts in place but for testing and 'on the day correction' it is still adjustable and re-lockable.

copied from the gov.uk website

Note 5: Bias bars and other mechanical adjusting devices fitted to twin
master cylinders must be rendered inoperable by mechanical means
e.g. lockwiring of components.

Note 6: Adjusting front/rear brake bias may invalidate approval and
breach Construction and Use requirements.

26. It must not be possible to manually adjust braking rates between
axles see note 4 and 5
(so no manual adjustment from the drivers seat)

27. Vehicles fitted with adjustable twin master cylinders that have been
rendered inoperable by mechanical means to comply with RS 26
must have a label affixed on the master cylinder or the immediate
vicinity with legible text as detailed in note 6.
Unofficially rated No.1 supplier of fabricated Haynes Roadster parts by the workshop rat population.

Direct email talonmotorfabrication@gmail.com

Last edited by TalonMotorFabrication : 26th January 2016 at 09:38 AM.
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Old 26th January 2016, 04:53 PM
RichardH RichardH is offline
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Join Date: May 2015
Location: fife scotland
Posts: 177

basically you cannot have a bias adjuster in the cab, it can be adjusted with a spanner at the master cylinder, fit nylock nuts and youll be ok
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