Hunter GSP9720JLR Operation Instructions Manual page 123

"P/SUV" Limits
"LT" Limits
Limits to "Factory Default"
Programmed Road Force® Limits
GSP9720JLR Wheel Balancer Operation Instructions
The control knob controls the "P/SUV" (P-Rated tire on a Sport Utility Vehicle) tire
multiplier. The multiplier is a figure that is multiplied to the passenger tire limit to
obtain the "P/SUV" tire limits. For more restrictive "P/SUV" tire limits, rotate the
control knob counter-clockwise. For less restrictive "P/SUV" tire limits, rotate the
control knob clockwise. As the multiplier changes, all of the "P/SUV" limits will change
corresponding to the current multiplier.
The control knob controls the "LT" (light truck) tire multiplier. The multiplier is a figure
that is multiplied to the passenger tire limit to obtain the "LT" tire limits. For more
restrictive "LT" tire limits, rotate the control knob counter-clockwise. For less
restrictive "LT" tire limits, rotate the control knob clockwise. As the multiplier changes,
all of the "LT" limits will change corresponding to the current multiplier.
NOTE: Selecting 1.0 for the multiplier for "LT" or "P/SUV" will disable
the "LT" and/or "P/SUV" selection on the balance screens.
Selecting "Set Factory Defaults" from the second menu tier will return all of the limits
to the factory default limits. "P/SUV" defaults to the disabled status as shown above.
The GSP9720JLR road force measurement default limit for P-metric tires is 26 lbs.
and for LT tires is 39 lbs. These default limits should be considered only as specified
guidelines. They are based on recommendations from many OE vehicle and tire
manufacturers and are a conservative average. Limits are used with the
GSP9720JLR as a point of reference so that diagnostic messages guide the operator
in decision making processes.
Do not use these limits as the only basis for a tire or wheel replacement. It is up to
the manufacturer of the tire or wheel to determine what is defective and what is
acceptable if warranty returns become a concern.
Road force limit settings can be programmed into the
tires (P tires), passenger/SUV tires (P/SUV tires), and light truck tires (LT tires).
Every vehicle platform has a different sensitivity level and tolerance to RFV and
imbalance. Known sensitive vehicles may require lower limits to resolve ride
disturbance issues. For example, in some cases, an extremely sensitive vehicle
may be affected when the tire/wheel assembly is above 15 lbs. RFM. A setting of 26
lbs. for P Tires and P/SUV Tires is often used as a "middle of the road" limit and does
a reasonable job of identifying tires or wheels that may cause a problem. Limits in the
Light Truck column are set higher to address the decreased vehicle sensitivity.
Hunter Engineering suggests that advanced users consider setting the default specs
to a lower value for "P" setting and use the limit title "P" for sensitive applications.
P/SUV limit values may be set to the original 26 lbs. This will give the operator three
selections to choose from, P, P/SUV and LT.
The lowest programmable radial 1st harmonic setting is 7 lbs, and the highest
programmable radial 1st harmonic setting is 40 lbs.
P, P/SUV, and LT may be selected by using the control knob on the GSP9720JLR.
GSP9720JLR for passenger
Equipment Information x 115