Home  
Site Partners: SpotterGuides Veloce Books  
Related Sites: Your Link Here  

Go Back   TenTenths Motorsport Forum > Racing Talk > Racing Technology

Reply
 
Thread Tools Display Modes
Old 22 Dec 2005, 16:47 (Ref:1488796)   #1
Rubinho
Racer
 
Join Date: Aug 2003
United Kingdom
Cambridge, UK
Posts: 167
Rubinho should be qualifying in the top 10 on the grid
Dunlop Optical Alignment gauge instructions

I'm looking for a set of instructions for the periscope style Dunlop optical alignment gauges. I think their model number is AGO/40. Does anyone have an electronic copy they could send me or point me at a link?

Thanks in advance.
Rubinho is offline  
__________________
"Ah," said Dirk "it is a rare mind indeed that can render the hitherto non-existent blindingly obvious."
Quote
Old 23 Dec 2005, 00:09 (Ref:1489028)   #2
dtype38
Race Official
Veteran
 
dtype38's Avatar
 
Join Date: May 2004
England
East London
Posts: 2,479
dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!dtype38 has a real shot at the podium!
Just bought a set myself. Didn't get any instructions, but really they are very easy to use......

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. If you want to know how to do that, pm me
dtype38 is offline  
Quote
Old 23 Dec 2005, 08:26 (Ref:1489124)   #3
graham bahr
Veteran
 
graham bahr's Avatar
 
Join Date: Jan 2003
England
cambs
Posts: 2,071
graham bahr should be qualifying in the top 10 on the gridgraham bahr should be qualifying in the top 10 on the grid
spot on dtype, i would just like to add.

rear toe is checked to same way except, you fit the gauages to the rear wheels with the mirror and periscope to the rear of the car and remember that the reading are reversed, so if the gauges read toe out when on the rear the wheels are actually toeing in, but the actual figure will be correct.

d type has said how to calibrate them, by putting the gauges together and zeroing them in, this is very important and needs to be done every time you use them as the design of the gauges means the calibration can easily wander.

also, when checking/ using/ adjusting the car, you must keep checking the pointers are against the cars wheels.

in an ideal world when checking wheel alignment you should check and compensate for wheel/ hub runout the very expensive top of the range all singing and dancing electronic machines do this automatically,

the way to do this is with the dunlop gauges is take a set of readings, and move the car either backwards or forwards by one half of a wheel revolution, and take another set of readings, the true alignment figure will be an average of both figures, hopefully they will be identical, but in the real world often are not
graham bahr is offline  
__________________
AKA Guru

its not speed thats dangerous, just the sudden lack of it!
Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Offered: Dunlop wheel alignment tools in UK Jeff Barley Racers Classifieds 3 27 Nov 2005 19:14
WHT Tyre Pressure Gauge Stone-kicker Club Level Single Seaters 2 9 Nov 2005 10:48
Dunlop Optical Tracking Gauges bzzzracing Racing Technology 22 12 Apr 2005 19:33
Gauge Watching Ray Bell Road Car Forum 27 6 Sep 2001 07:07


All times are GMT. The time now is 10:21.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Original Website Copyright © 1998-2003 Craig Antil. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2004-2021 Royalridge Computing. All Rights Reserved.
Ten-Tenths Motorsport Forums Copyright © 2021-2022 Grant MacDonald. All Rights Reserved.