the least complicated of all alignment equipment and
illustrate the fundamentals for wheel alignment easily.
In larger shore facilities these basic types of
equipment are normally replaced with a large
alignment rack. The alignment rack consists of ramps,
turning radius gauges. and specialized equipment for
measuring alignment angles.
Turning Radius Gauges
Turning radius gauges (fig. 8-54) measure how
many degrees the front wheels are turned right or left.
They are used when measuring caster, camber, and
toe-out on turns.
The portable type turning radius gauges are the
most common in the Naval Construction Force (NCF).
However, they are also mounted on alignment racks as
The front wheels of the vehicle are centered on the
turning radius gauges. With the front wheels centered,
the locking pins are pulled out which allows the gauge
and tire to turn together. The pointer on the gauge will
indicate how many degrees the wheels have been
The procedures for checking toe-out on turns using
turning radius gauges are as follows:
Center the front tiresofthe vehicle on the turning
radius gauges and remove the locking pins.
Turn one of the front wheels until the gauge
reads 20 degrees.
Figure 8-54.Turning radius gauge, portable type.
Then read the number ofdegrees showing on the
other gauge. Check toe-out on turns on both right
and left sides. Note the readings.
If not within manufacturer specifications, check
for bent or damaged components.
The caster-camber gauge is used with the turning
radius gauge to measure caster and camber in degrees.
The caster-camber gauge either fits on the hub
magnetically (fig. 8-55) or may be mounted on the
wheel with an adapter (fig. 8-56). Caster and camber
are adjusted together since one affects the other.
Figure 8-55.Magnetic Caster-Camber Gauge.
Figure 8-56.Caster-Camber Gauge mounted on a wheel