5.4 Service Mode Setup and Features 
NOTE:  Service Mode should only be used by authorized users or 
Hunter Engineering Company authorized service personnel. 
Some options in Service Mode may not be available. 
Options in Service Mode are dependent on the specific 
authorization key installed. 
Enter “Service Mode” by pressing and holding K2 and K3 and pressing the Reset 
softkey twice quickly from any screen. This will immediately return the user to the main 
screen and “Service Mode” will then be displayed at the top of the screen. 
“Service Mode” enables the selection of advanced customized settings and hardware 
specific setup.  
Set Date and Time 
Selects the correct date and time for both display and printouts. 
Prompted Inflation Station 
Enables or disables the program to automatically prompt the user to set tire pressure. 
Prompted Centering Checks 
Enables or disables the program to automatically prompt the user to perform a 
centering check on each wheel. 
Runout & Road Force® Limits 
Selects the amount of road force and runout needed to exceed limits.  
“P” Limits 
The control knob changes the “P” (passenger) tire limits. Push the control knob in to 
select the measurement limit you desire to change. For more restrictive passenger 
tire limits, rotate the control knob counterclockwise. For less restrictive passenger tire 
limits, rotate the control knob clockwise. The light truck and sport utility vehicle limits 
are based on the limits set for the passenger tires. As the passenger tire limits 
change, the corresponding “LT” and “P/SUV” limits will also change. 
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 Equipment Information  GSP9720JLR Wheel Balancer Operation Instructions