3.9 -6.5 lorry owners - mot brake test warning

sidewaysonacob

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26 July 2011
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It's been an expensive week as my 3.9 only passed the mot on the third try due to failing the handbrake test by a couple of %.

My garage were initially stumped, but it now appears that the break requirements for the rolling road test are now very tight - and based on what a 7.5 should achieve. My 3.9 has an immaculate set of brakes (before attempt #2 the garage stripped the handbrake to be sure!) but they aren't as strong as those on a 7.5 as there is less weight to stop.

My garage/builders/mechanics ended up doing a legal work-around to boost my breaking power, but this problem is new to them so I expect other smaller boxes that have to take the 7.5 test to run into problems soon, so warn your garage when you take it in.
 

wingedhorse

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7 November 2005
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I thought had been thus for years. Was why I was advised 4 years ago against uprating my 3.5T to 3.9T. Mechanic said v v hard to get through Brake test!
 
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