Longacre 78290 Digital Caster_Camber Gauge with AccuLevel (version 2) User Manual
Warning
Instructions For No. 78290 Digital
Caster/Camber Gauge
1) Find a level place to set up your front end. This unit reads camber very accurately. Unlevel
ground will affect that accuracy.
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.
3) Rotate the gauge until the small vial on the top of the gauge shows level.
4) CAMBER: Turn on the
AccuLevel™
Digital Readout by pushing “
ON/OFF”. Camber is
read directly on the display to .1
O
(1/10
O
). 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.
5) CASTER is measured with the vial on the top - from 4
O
negative to 12
O
positive. First turn the
wheels 20
O
to the right when setting the RF or 20
O
left when setting LF. Rotate the gauge until it
is level.
6) Turn the knurled nob in the center until the center caster vial reads 0
O
. Now turn the wheels
back past center to 20
O
the opposite way - for a total of 40
O
. Rotate the gauge again to level
(DON’T turn knurled knob). Read the Caster directly on the vial. Read to the center of the
bubble. Each line is 1/2
O
.
7) 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. Tighten bolts & double check all settings.
CASTER NOTE: If you wish to measure caster to .1
O
(1/10
O
) on the digital readout please see
supplemental instructions. Caster measured with the vial on top is to 1/2
O.
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 and/or break-
age of the vials could occur due to heat
expansion.
Once it cools down the digital display should be visable again.
Replacements for broken vials can be ordered from any authorized
dealer or the factory. Replacement is quick and simple with no loss
of accuracy.
Monroe, Wa 360 453 2030 www.longacreracing.com
11/06
20
O
20
O
Turn wheels 20
O
each way
when setting caster
(15
O
using
digital)
See the separate instructions for the
AccuLevel™
on the reverse of this if
needed. It can be removed and used for other
measurements. Simply slide
AccuLevel™
out (it’s held in place with magnets).