Longacre 78290 Digital Caster_Camber Gauge with AccuLevel (version 4) - Manual

1) Find a level place to set up your front end. This unit reads camber and caster very accurately.
Unlevel ground will affect that accuracy. SEE BELOW IF GROUND IS NOT LEVEL.
2) Attach the gauge to the spindle. Be sure that the surface you attach to is machined square to the
spindle and doesn't have any nicks or burrs. BE SURE WHEELS ARE POINTED STRAIGHT
AHEAD WHEN SETTING CAMBER. Rotate the gauge until the small vial on the top of the
gauge shows level.
3) CAMBER: Turn on the AccuLevel™ . Camber is read directly on the display to .1 O (1/10 O ).
Be sure the display is not flashing. This indicates it is in Caster Mode - CASTER see below. Push
CASTER button to exit Caster and get into get into Camber Mode - steady display reading.
See separate AccuLevel™ instructions if needed. On the left side of the display a pointing up indicates negative
camber (top of tire in). A pointing down indicates positive camber (top of tire out). Race cars usually use negative
camber on RF and positive camber on LF. This is helpful when using small camber numbers - less that 1
O .
4) CASTER is measured digitally on this version - up to 45 O negative or 45 O positive. First turn the
wheels 15 O to the right when setting the RF or 15 O left when setting LF. (NOTE: THIS IS DIFFER-
ENT THAN WHEN USING VIAL GAUGES WHICH USE 20 O . IT IS IMPORTANT TO TURN
THE WHEELS EXACTLY 15 O FOR MAXIMUM ACCURACY.) Rotate gauge until it is level.
5) Turn on the AccuLevel™ and push the CASTER button. The display will flash on and off to
indicate caster is being measured. Push ZERO - display now reads 0 O . Now turn the wheels back past
center to 15 O the opposite way - for a total of 30 O
(AGAIN THIS IS DIFFERENT THAN WHEN USING VIAL
GAUGES)
. Rotate the gauge again to level and read the caster directly on the display to 1/10 O .
(Some previously models required you to double this number - NOT with this version.)
6) Adjust the caster and camber as needed. Each time you make a change bounce on the front end to
settle the suspension. NOTE: Adjusting the caster may have an effect on the camber and vice versa.
Double check settings. Tighten all bolts when done.
1 5 O 1 5 O
DIGITAL CASTER ONLY
Turn wheels 15 O each way
when setting Digital caster
Instructions For No. 78290 Digital
Caster/Camber Gauge
Warning:
Do Not leave the gauge in the hot sunlite or store in a place
over 120
O F. The digital display may not be readable.
Once it cools down the digital display should be visable again.
Monroe, Wa 360 453 2030 www.longacreracing.com
7/07
Ver 4
See separate instructions for AccuLevel™ if
needed. It can be removed and used for other mea-
surements. Simply slide
AccuLevel™ out (it’s
held in place with magnets).
NOTE: If display flashes on and off
AccuLevel™
is in Caster mode and will not read absolute angles
correctly. Push
CASTER button to exit Caster Mode.
IF GROUND IS NOT LEVEL :
Before checking camber remove AccuLevel™ and
place on ground parallel to axle centerline. If it does not
read 0.0
O push “ZERO”. Replace AccuLevel™ in
gauge and proceed as above. This must be done on each
side of the car and will compensate for non-level ground.
Push “ZERO” again to go back to normal (absolute)
operation.