L322 MOT Brake Test Question

Hi All

Its that time of year again for my 2003 L322 Range Rover to have its MOT - this is the first time i will be getting my Range Rover a MOT and i have a quick question on the brake test in the workshop manual it states that the range rover must not be brake tested on a 2 wheel rolling road without removing the stationary driveshaft from the transfer box (i.e. the one not on the rolling road) but the local garage where i was going to get it MOT'ed said that testing it on a 2 wheel rolling road will be ok without removing the prop shaft, is this correct or should it be tested on a 4 wheel rolling road. What happens with your range rovers?

Thanks

Matt

as lr said its supposed and trys to have all four wheels turning go somewhere else

In short the tester you have spoken to does not fully know what they are talking about. Permanent four wheel drive needs a decelerometer test. That is the little box they put on the dash, drive the car on the road and apply the brakes. Do not ever listen to the "It'll be alright" routine or "for all the distance it's going" etc etc. By rights when the car is logged in the tester's computer it should give a printout of instructions including which brake testing method applies. I'd be going elsewhere.

The newer two wheel brake test rollers are ok as each roller turns in opposite directions. I was told this by my MOT man who is aslo a Landy driver.

Nicktrackside said:

The newer two wheel brake test rollers are ok as each roller turns in opposite directions. I was told this by my MOT man who is aslo a Landy driver.

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NOOOOO!!!! :doh::doh::doh:

Why ?

I have checked several companies who make brake test rollers and all allow 4x4 testing. Brake testers | MoT test brake testing equipment for car, motorcycle, 4x4 and light commercials

so which is it? 2 wheel or 4 wheel can i ask what other range rover owners on here do?

Thanks
Matt

The guy who has tested my vehicles for years does not even put selectable 2/4 wheal drive vehicles (Series landies, Toyota Hi-Lux's ETC) on his 2 roller road he does all of them with a brake decelerometer so there is no chance of damaging any off them also its a pain in the arse to keep taking off prop shafts each time aswell as the time factor.

So I would ignore what he is saying and go some where they know what they are doing!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!. Because damage is expensive to repair.
For the price of piece of mind search for a better MOT station.

Nicktrackside said:

The newer two wheel brake test rollers are ok as each roller turns in opposite directions. I was told this by my MOT man who is aslo a Landy driver.

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you are putting alot of stress through diff, which where it is possible is not good for long life ,diffs will allow wheels to turn at different speeds but this is smooth and gradual not spinning wheels in opposite directions then stopping and strating abruptly,so you woud have front diff screaming in opposite directons with center diff spinning too

I've had my RR MOT'd twice now at a centre that has a 2 roller tester that is put into 4x4 mode as the tester put it. I questioned him about the 2 roller machine and he said it has this special mode for 4x4's. As others have said it rotates the wheels in opposite directions. I cannot say it has harmed the car, but I'm interested in this issue. I'd like to know if it could cause damage for the future MOT's.

LW....

In theory. if both rollers are spinning at EXACTLY the same speed but in opposite directions, the propshaft should not turn at all. (Just the same as having the car jacked up and in gear. Turn one wheel and the other will turn in the opposite direction). But it will depend on having them at the same speed. Different speeds equals the prop shaft turning.

Derek Ward said:

In theory. if both rollers are spinning at EXACTLY the same speed but in opposite directions, the propshaft should not turn at all. (Just the same as having the car jacked up and in gear. Turn one wheel and the other will turn in the opposite direction). But it will depend on having them at the same speed. Different speeds equals the prop shaft turning.

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Theoretically makes sense, but must be EXACT.........me....i'd go elsewhere....simples!!

this has been discussed several times before, if the test station has the later type roller which spin the opposite wheel in the opposite direction then you will be ok, as the prop shaft wont turn so there is NO stress on ANY of the drive train. Decelerometer test is ok but personally would rather have it done on a roller..and yes i am a tester and do ALL 4 wheel drives this way and have done ever since we got the new rollers installed.

front diff gets a bit of extra work,i wouldnt trust word of mot tester dont even have to be time served to become tester most i know wouldnt let touch anything technical

jamesmartin said:

front diff gets a bit of extra work,i wouldnt trust word of mot tester dont even have to be time served to become tester most i know wouldnt let touch anything technical

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Time served? i know a mechanic who is time served and i wouldnt let him fix my bloody pen never mind my car..testers nowadays have to be qualified and if they are not they have to take an entrance exam..and front diff gets no work at all if the roller is the later type with opposing roller turning in opposite direction of the wheel being tested.

MOT just done on mine....said it was 4x4 and they said eve with new rollers will take it out on the road to be safe.

any damage caused to a vehicle in the course of an MOT is down to the testing station.