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#Post#: 33514--------------------------------------------------
mot brake test
DIR By: seriesewan
Date: August 7, 2012, 9:01 am
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is it normal for MOT testers to run a mile from putting a landy
on rollers?
had mine done this morning & the tester made a big hoohar & had
to ring for advice about weather to roller it or tapeley it
not complaining as i gota big fat pass :D but i am intrigued as
to where the confusion came from
#Post#: 33519--------------------------------------------------
Re: mot brake test
DIR By: Goose
Date: August 7, 2012, 9:19 am
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Something about transmission handbrakes and rolling roads
springs to mind I think!
#Post#: 33528--------------------------------------------------
Re: mot brake test
DIR By: Rich_P
Date: August 7, 2012, 10:17 am
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At a guess, the full time 4WD models aren't allowed on the
single axle rollers without risk of either damage to the vehicle
or (I presume) worse if the LR gets launched off the rollers.
#Post#: 33532--------------------------------------------------
Re: mot brake test
DIR By: ejparrott
Date: August 7, 2012, 11:01 am
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^^ correct
If there is a proper 4WD set of rollers avaliable then it can be
done. Most testers do not know that Series land rovers are not
4WD, and so put them on the taply, which usually gets a dodgy
motor through.
#Post#: 33542--------------------------------------------------
Re: mot brake test
DIR By: Albert Ross
Date: August 7, 2012, 12:17 pm
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You should NEVER use a Tapley for Series parking brakes.....
There is a method, too long winded to write out because I can't
be arsed, and it works. I use it on every Series I test. Yeah,
both of 'em.
#Post#: 33547--------------------------------------------------
Re: mot brake test
DIR By: guest13
Date: August 7, 2012, 1:14 pm
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Mines always been done on the rollers,
In fact I usually end up arguing with the tester that it can be
done, as I value my gearbox to much to let him drive it
#Post#: 33561--------------------------------------------------
Re: mot brake test
DIR By: seriesewan
Date: August 7, 2012, 2:33 pm
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--- Quote from: Albert Ross link ---
>
> You should NEVER use a Tapley for Series parking brakes.....
There is a method, too long winded to write out because I can't
be arsed, and it works. I use it on every Series I test. Yeah,
both of 'em.
>
--- End Quote ---
i am guessing the damage would be pretty obvious if he were to
have knackered it... ie bust prop / diff
failing that what what should i be checking?
#Post#: 33566--------------------------------------------------
Re: mot brake test
DIR By: Albert Ross
Date: August 7, 2012, 3:04 pm
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Right. There's nothing you can check except to be certain your
linkages are in good order, also that they and the shoes are
adjusted well, that there is no oil leak around the drum, and
the mountings are good. There needs to be a lttle slack up to
the first click, and you need to be able to feel it come on
after about three. Then you will hopefully see slight movement
of the levers all together. But not too much. Try gently
driving forwards without throttle. It should stall after
juddering slightly.
For the MOT Test itself, it's a bit more complex. The tester
needs to ascertain whether the braking system is single or dual
circuit, and the weight of the vehicle relative to wheelbase and
engine etc. Then with the know figures the tester needs to
calculate the minimum braking effort required to pass. This is
basically 16% if a dual circuit, or 25% if single circuit. For
instance, if the vehicle has a weight of 1500kg, then the
minimum required effort for a single circuit system would be
375kg/fm. <--- What that is , fuck knows. This translates to a
minimum of 190 kg per rear wheel. Note, rear wheel! This formula
works for all Class 4 vehicles.
Make certain hubs are unlocked (if fitted) and that the yellow
is up, and the red forward. With the vehicle's rear wheels in
the rollers, both rotating forwards, with THE BUTTON DEPRESSED,
gently lift the lever until the desired minimum effort is
reached. Then release. Record this minimum effort, it is a pass.
As for the service (foot) brake, each wheel is treated like a
normal car.
#Post#: 33584--------------------------------------------------
Re: mot brake test
DIR By: NoelC
Date: August 7, 2012, 5:09 pm
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To add to what Jim says the greatest resistance I've found from
testers to the rollers is series motors are simply too old to
appear on their weight chart so they don't know what to put in
the system. I go armed with a photocopy from the series 3 owners
manual that lists the EEC kerb weights and that cures the
problem.
#Post#: 33596--------------------------------------------------
Re: mot brake test
DIR By: estwdjhn
Date: August 8, 2012, 1:58 am
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I know why some testers are cautious - a lad round here tested a
fourtrack(iirc) last week which proved to be stuck in 4wd
despite 2wd having been selected... they worked out what had
happened after it had thrown itself out to the rollers and into
the car next to it...
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