60 4. Balancing a Wheel GSP9700 Series Road Force Measurement System Operation
4.4 Load Roller
Load Roller Operation
The load roller runs parallel to the tire and applies a perpendicular load on the
assembly to take Road Force Measurements. It is capable of applying up to 1400
pounds of force. The amount of force placed on the tire is dependent upon the tire’s
diameter and stiffness. The load roller will not overload the tire.
NOTE: It is important that the air pressure of the tire is set to
specifications prior to the Road Force Measurement.
Incorrect tire pressure will affect the results.
If the GSP9700 is equipped with the Inflation Station feature,
the tire can be easily set to the specified air pressure. Refer
to “Inflation Station,” page 81.
The load roller can be enabled and disabled by turning the control knob. When the
load roller is enabled, the CRT will display the load roller on the screen as shown
below.
QUICKMATCH WITH LIMITS ENABLED
Road Force with Limits Enabled: when the load roller selection is made, “LT Tires,”
“P-SUV Tires,” or “P Tires” road force specifications can be highlighted by slowly
turning the knob to the appropriate selection. Changing the “LT Tires,” “P-SUV Tires,”
or “P Tires” selection will change the limit specifications for road force and rim runout.
Refer to “Setting Up the Runout & Road Force Units,” page 109.
NOTE: The load roller cannot be enabled in “Bare Rim Spin” mode.
When the load roller is disabled, only a balance spin will be performed. This can be
useful for a balance check spin after weights have been applied.
Load roller data can be viewed by selecting “Show Runout & Road Force” from the
“Balance” primary screen.
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