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ATL brake testing  Rate Topic 
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 Posted: Sun Jan 13th, 2013 10:50 am
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kit1958
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ivorbiggin wrote:
Thanks for that Kit, i found it after doing a bit of searching.

 


Like they say, all the answers are in the book :D

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 Posted: Sat Jan 12th, 2013 10:37 pm
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ivorbiggin
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Thanks for that Kit, i found it after doing a bit of searching.

 

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 Posted: Sat Jan 12th, 2013 10:20 pm
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kit1958
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ivorbiggin wrote:
kit1958 wrote: Its been a while since i was involved with class 7 but from mem if both front wheels lock and each rear pulls over 100kg and its unloaded its deamd tobe ok. If both p b lock what more can you do?

On class 4 rember to use the wieght from the rbt in the vts, & you are required to keep the printout.

Hope that helps


Where does it say the vehicle has to be unloaded?

Also, provided more than half of the braked wheels lock out, its a pass on efficiency. That goes for both service and parking brake




Have a read of this from the manual
"When testing service brake performance on unladen Class 7 vehicles premature wheel lock can occur resulting in less than the required brake effort being achieved. This may be due to the action of load sensing or pressure reducing equipment in the service brake system. In such cases, the service brake percentage efficiency is considered satisfactory if: (i) more than half the wheels lock, or (ii) both front wheels lock and at least 100kg (220lb) is achieved by each rear wheel"

3.7 info, it's still there :D:D

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 Posted: Fri Jan 11th, 2013 09:24 pm
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kev1975
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ivorbiggin wrote:
kit1958 wrote: Its been a while since i was involved with class 7 but from mem if both front wheels lock and each rear pulls over 100kg and its unloaded its deamd tobe ok. If both p b lock what more can you do?

On class 4 rember to use the wieght from the rbt in the vts, & you are required to keep the printout.

Hope that helps


Where does it say the vehicle has to be unloaded?

Also, provided more than half of the braked wheels lock out, its a pass on efficiency. That goes for both service and parking brake


if the class 7 vehicle is not unloaded then it needs to either lock at least 3 wheels or be above 50% service brake efficiency & parking brake over 16% or both locked .
if the vehicle is unloaded & both front wheels lock , both rears pull 100kg & the parking brake locks both sides then it will pass regardless of % efficiency .
just remember to tick the unladen box on brake results entry .

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 Posted: Fri Jan 11th, 2013 08:54 pm
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ivorbiggin
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kit1958 wrote: Its been a while since i was involved with class 7 but from mem if both front wheels lock and each rear pulls over 100kg and its unloaded its deamd tobe ok. If both p b lock what more can you do?

On class 4 rember to use the wieght from the rbt in the vts, & you are required to keep the printout.

Hope that helps


Where does it say the vehicle has to be unloaded?

Also, provided more than half of the braked wheels lock out, its a pass on efficiency. That goes for both service and parking brake

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 Posted: Fri Jan 11th, 2013 01:10 pm
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kit1958
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Its been a while since i was involved with class 7 but from mem if both front wheels lock and each rear pulls over 100kg and its unloaded its deamd tobe ok. If both p b lock what more can you do?

On class 4 rember to use the wieght from the rbt in the vts, & you are required to keep the printout.

Hope that helps

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 Posted: Thu Jan 10th, 2013 11:12 pm
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Wesley
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Yeah Me too,;)

It seems a bit strange though when you get a Transit 3500 kgs, in and it passes on only 47% service brake reading and a 15% park brake reading? A 100%  "lock out"passes it i guess??:?

ps;

If I Had actually taken this Vehicle out on the Road and carried out a "Decelerometer" Test, then it would probably have flown through and passed on something like a 65% service brake and a 20% park brake!:) 

Last edited on Thu Jan 10th, 2013 11:23 pm by Wesley

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 Posted: Tue Jan 8th, 2013 08:33 pm
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kit1958
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Wesley wrote:
Hi,

I am covering compassionate leave at our other site at the moment, and am loving them now.;) 

I have discovered by use that if the handbrake is on whilst testing the front brakes, the vehicle Isn`t thrown out of the rollers and will provide a more accurate brake reading and record correctly any lock out.

By Chocking the front wheels whilst carrying out the rear parking brake test, Increases the measured percentage from, say 16 or 17% to 25% and as above Will record any lock out.;)

Prior to using the Chocks, I personally wasn`t impressed and always carried out a decelerometer test to prove it.

We have a scissor lift with no pillars no problem, but the use of an assistant to place a couple of chocks in for you is allowed.;)

Hope this helps.:D  


Glad to see that you getting to use some nice new gear :D

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 Posted: Mon Jan 7th, 2013 11:07 pm
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Wesley
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Hi,

I am covering compassionate leave at our other site at the moment, and am loving them now.;) 

I have discovered by use that if the handbrake is on whilst testing the front brakes, the vehicle Isn`t thrown out of the rollers and will provide a more accurate brake reading and record correctly any lock out.

By Chocking the front wheels whilst carrying out the rear parking brake test, Increases the measured percentage from, say 16 or 17% to 25% and as above Will record any lock out.;)

Prior to using the Chocks, I personally wasn`t impressed and always carried out a decelerometer test to prove it.

We have a scissor lift with no pillars no problem, but the use of an assistant to place a couple of chocks in for you is allowed.;)

Hope this helps.:D  

Last edited on Tue Jan 8th, 2013 12:18 am by Wesley

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 Posted: Fri Nov 18th, 2011 07:56 pm
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castrolrob
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removalizer wrote: The only problem I have with ATL is whether to take readings using the actual weight or the design weight, VOSA told me to use design weight however if I did that all the ka's and fiesta's would failyou forgot the saxo/ax/peugeot 106/306/any transit/movano etc etc.does atl involve removing common sense,or failing that a tapley test?

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 Posted: Sat Nov 12th, 2011 05:41 pm
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kit1958
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:D:D:D

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 Posted: Sat Nov 12th, 2011 08:43 am
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removalizer
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Thanks for that kit I really should read the testers manual more instead of those porn mags :)

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 Posted: Wed Nov 9th, 2011 06:26 pm
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kit1958
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It says in the book "class 4 presented weight must be used" http://www.motinfo.gov.uk/htdocs/m4s03000702.htm

I never have probs using that as "kerbside" in the vts :)

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 Posted: Tue Nov 8th, 2011 10:53 pm
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getech.org.uk
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The ATL brake tester must give you an output pass / fail at the end of the ATL test.

If the VTS device disagrees with the brake tester and says FAIL it must either a) be a marginal pass or b) you havent used the 'as presented' weights for the data entry to the device and selected 'kerb weight' or c) the brake tester is poorly or improperly calibrated.

Hope this helps...

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 Posted: Tue Nov 8th, 2011 09:14 pm
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removalizer
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The only problem I have with ATL is whether to take readings using the actual weight or the design weight, VOSA told me to use design weight however if I did that all the ka's and fiesta's would fail

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 Posted: Sat Nov 5th, 2011 08:43 pm
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kit1958
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I use an atl set up and love it, would not want to go back to "manual testing" again.

Is plate brake testing allowed on an atl?

When I use the rbt there seems little point in using the wheel chocks as results are rarely borderline. I am sure that I have read that the use of chocks is optional anyway.
1 thing is that it does record quite a few fails on front brake imbalance as it records all the effort on the balance test, and if it is over 25% at any point it records the result, as it says in the book.
The outer good feature is that it saves results on a hard drive and gives a printout in case of any arguments at a later date :)

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 Posted: Sat Nov 5th, 2011 01:20 am
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Robobo
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Post deleted - no advertising

Last edited on Sat Nov 5th, 2011 10:06 am by

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 Posted: Thu Mar 11th, 2010 10:46 pm
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Wesley
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"If" I was thinking of opening a new site or updating an existing one,

Then it would be an ATL Scissor Lift and a bi-directional roller set.

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 Posted: Thu Mar 11th, 2010 04:59 pm
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garage express
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use a flat brake tester you drive on it a hit the brakes no rollers should over come your problem

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 Posted: Tue Mar 9th, 2010 11:03 pm
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catoniasta
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We're thinking of installing an ATL, and as we weren't sure what was involved we visited another site to view the equipmment and test procedure.

Before carrying out the parking brake test the tester placed chocks behind both front wheels to prevent the car from riding out.

Due to our proposed layout I can forsee problems getting out of the car to fit chocks while the rear wheels are in the rollers due to the lack of clearance between the drivers door and the rear lift post.  

I'm interested to hear from other ATL testers as to how often they use chocks and wether they have door clearance issues. A scissor lift has been suggested but I would prefer a 4 post lift if possible. 

 

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