Page 3-32
Chapter III Operation
Page 3-32
Chapter III Operation
Page 3-32
Chapter III Operation
Readings Screen
The
Readings
screen displays the primary vehicle
alignment information in an intuitive, three dimensional
format. The screen appears as a vehicle with the body
lifted off, viewed from the rear and above. Review the
fi gure above to become familiar with the screen layout
and functions.
Each wheel angle has a numeric reading as well as
a graphical meter display indicating directional ori-
entation and relationship to specifi cations. Camber
meters, located along the top of each tire, have a
line that indicates camber relative to the preferred
specifi cation. Toe meters, projected onto the ground
in front of each tire, have an arrow that indicates the
toe angle. Caster is represented by a meter in front of
each wheel. The numeric value for caster is directly
above the meter. When a meter is green, the reading
is within specifi cations. When the arrow is centered
within the green it is at the preferred value. A red meter
indicates the reading is out of specifi cation. The red
meter contains a green band, indicating the direction
of needed change. A gray meter indicates there is no
specifi cation for that angle.
All numeric readings on this screen are actual live
measurements, including caster. If any angles require
correction, make sure the brake pedal depressor is en-
gaged and the steering wheel is centered and locked,
then simply begin the adjustment. As the angles change
the display will update to refl ect the new readings. The
numeric values change and the meter indicators move
in the direction of change. Click on OK to proceed to
the next readings screen.
Turn Wheels Straight Ahead
The screen then changes to indicate the requirement
to turn the wheels to the straight ahead position. Cen-
tering the steering allows the geometric center-line to
be established for the rear readings which in turn will
determine the thrust angle or rolling direction. Thrust
Angle is the direction of the vehicle travel determined
by the total toe of the rear wheels. The thrust angle
is used as a reference when adjusting the front toe so
that a straight steering wheel is the end result. Toe
error on many rear wheel drive vehicles cannot be cor-
rected, creating a dog tracking effect and/or a crooked
steering wheel.
If the wheels are already straight ahead this screen
will briefl y appear and automatically proceed.
Summary of Contents for Pro42
Page 1: ...Operators Manual Portable Imaging Alignment Systems with Pro42 ...
Page 2: ...Blank page ...
Page 8: ...Page 8 Table of Contents ...
Page 65: ...NOTES ...
