Ive been given a Dunlop optical tracking device, its in 2 parts, one has got a mirror and the other a viewfinder theres also a movable toe in/ toe out bit. Thing is I haven't got a clue how to use it? has any member got one that they use and could give me some pointers, or is there anywhere that I could get instructions from? Cheers Mart.
Dunlop Tracking Tool
Started by
bikenutmart
, Jan 06 2016 04:23 PM
10 replies to this topic
#1
bikenutmart
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Posted 06 January 2016 - 04:23 PM
#2
Tamworthbay
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Posted 06 January 2016 - 04:49 PM
Take one large bit of flat floor and bung your car on it 
Take one of the units and stand it beside a front wheel with the mirror/periscope end sticking out the front of the car.
Set the bar clamps at the nearest stop to the height of the centre line of your wheel. then adjust the spacing so that the tips of the bars touch the front and back edge of the rim (either on the bead or on a convenient flat section).
Now stand that section of the gauge on the floor away from the car and stand the other section beside it. Adjust the bars on the second section so that they are at the same height and spacing as the one you set up on the wheel.
Once done, push the two sections together very carefully so that the tips of both sets of bars just touch each other. Make very sure that the units are sitting fully on their feet and the tips are just all touching.
Now look down through the periscope and you should see the alignment plate in the mirror. If not rotate the mirror or the periscope on its mounting shaft, and/or rotate the periscope using the tracking adjustment arm over the gauge marks at the end. When you can see the black arrow(s) in the mirror, line them up exactly with the vertical line using the tracking adjustment arm.
Now look at the graduations on the scale at the end of the gauge and the line in the plastic magnifying section. Loosen the screws holding the scale and move it so that the zero is under the line.
Go back and double check that the tips of the bars are all just touching and look down the periscope to check the line is still on the black arrow. If necessary, adjust the scale back to zero again. Your gauge is now ready.
Centre the steering on you car and (if you aren't on turnplates) wheel your car back an forward a bit to settle the tracking.
Put each half of the tracking gauge against each of the front wheels, business end sticking out forwards, and again make sure that the tips of the bars are just touching the rims at equal points on the front and back edge.
Look through the periscope and you should see the alignment mark (now quite small) has moved sideways. Adjust the periscope using the adjustment arm until the alignment arrow is back on the vertical line.
Read off the toe in (above the zero line) or toe out (below the zero line) from the scale at the end in degrees and minutes (60th of a degree). This can be converted into a linear measurement (mm or fractions of an inch) for your size of wheel using the round black gauge on the aligment arm.
Take one of the units and stand it beside a front wheel with the mirror/periscope end sticking out the front of the car.
Set the bar clamps at the nearest stop to the height of the centre line of your wheel. then adjust the spacing so that the tips of the bars touch the front and back edge of the rim (either on the bead or on a convenient flat section).
Now stand that section of the gauge on the floor away from the car and stand the other section beside it. Adjust the bars on the second section so that they are at the same height and spacing as the one you set up on the wheel.
Once done, push the two sections together very carefully so that the tips of both sets of bars just touch each other. Make very sure that the units are sitting fully on their feet and the tips are just all touching.
Now look down through the periscope and you should see the alignment plate in the mirror. If not rotate the mirror or the periscope on its mounting shaft, and/or rotate the periscope using the tracking adjustment arm over the gauge marks at the end. When you can see the black arrow(s) in the mirror, line them up exactly with the vertical line using the tracking adjustment arm.
Now look at the graduations on the scale at the end of the gauge and the line in the plastic magnifying section. Loosen the screws holding the scale and move it so that the zero is under the line.
Go back and double check that the tips of the bars are all just touching and look down the periscope to check the line is still on the black arrow. If necessary, adjust the scale back to zero again. Your gauge is now ready.
Centre the steering on you car and (if you aren't on turnplates) wheel your car back an forward a bit to settle the tracking.
Put each half of the tracking gauge against each of the front wheels, business end sticking out forwards, and again make sure that the tips of the bars are just touching the rims at equal points on the front and back edge.
Look through the periscope and you should see the alignment mark (now quite small) has moved sideways. Adjust the periscope using the adjustment arm until the alignment arrow is back on the vertical line.
Read off the toe in (above the zero line) or toe out (below the zero line) from the scale at the end in degrees and minutes (60th of a degree). This can be converted into a linear measurement (mm or fractions of an inch) for your size of wheel using the round black gauge on the aligment arm.
#3
FlyingScot
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Up Into Fourth
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Posted 06 January 2016 - 05:40 PM
Have a look here if you want to print out the instructions. Wise Old Elf posted the link in an earlier query about these 
http://maktools.com....e Uso/AGO40.pdf
FS
http://maktools.com....e Uso/AGO40.pdf
FS
#4
Stiggytoo
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Posted 06 January 2016 - 09:10 PM
.
Edited by Stiggytoo, 06 January 2016 - 09:10 PM.
#5
bikenutmart
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Posted 06 January 2016 - 09:15 PM
Brilliant Tamworthbay!! that's really good of you! also printed out the link courtesy of Flying Scot, I know these are old school, but so am I,( and my 72 850) feel a bit stupid having to ask how to use it. But if you don't know the answer, its not a stupid question!! Cheers Guys Mart.
#6
Tamworthbay
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- Name: Clive
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Posted 06 January 2016 - 09:37 PM
They might be old but they are brilliant, I used a set for years before they were nicked from my workplace. Now got an eBay laser special and it's nowhere near as good.
#7
bikenutmart
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Posted 06 January 2016 - 09:46 PM
I got a bargain for free then!! Cant wait to try it out, now I know how to use it!. Mart.
#8
Alex_B
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Doesn't put foot in mouth enough!
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Posted 06 January 2016 - 09:50 PM
I use these all the time at work, perfect for quickly checking the tracking before a car goes out on track or when time doesn't allow a string line setting up. Nice bit of kit, sometimes the old ways are the best!
#9
bikenutmart
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Posted 06 January 2016 - 10:10 PM
Thanks Alex.
#10
GraemeC
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Posted 06 January 2016 - 10:24 PM
And spares are readily available too.
#11
bikenutmart
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Posted 07 January 2016 - 11:40 AM
Really!! that's amazing, where from? Mart.
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