Hunter GSP9712 - Dos and Donts of Road Force Measurement; Quickmatch Tire and Wheel Mounting

66  4. Balancing a Wheel GSP9700 Series Road Force Measurement System Operation
Do’s and Don’ts of Road Force Measurement
 Tires may need to be warmed up to remove temporary flat spots prior to
testing.
 Verify the wheel is centered.
 Use the approved adaptors for GSP9700.
 Use wing nut provided and it must be tight (do not use quick take up wing
nuts).
 Tire inflation pressure must meet vehicle manufacturers specifications.
 The tire/wheel assembly must be free of debris.
 Bare rim runout measurements are required if the wheel design does not
permit external measurement of the outer bead seat area.
 Use realistic Road Force measurement limits for the vehicle being tested.
 If chosen limits have been exceeded, never use Road Force measurement
alone to replace a tire unless specified by the manufacturer.
4.6 QuickMatch™ Tire and Wheel Mounting
QuickMatch™ tire and wheel mounting procedure is a method of aligning the high
spot of the radial loaded runout first harmonic (once-per-revolution component) with
the average low spot of the radial rim runout first harmonic to decrease vibration in
the wheel assembly. Refer to “Theory of Operation,” page 131.
QuickMatch™ is available as a softkey selection if enabled from the setup menu.
This method of match-mounting does not calculate Road Force, however, displays
runout measurements of the tire and wheel with faster cycle time compared to road
force measurement. QuickMatch™ with runout is faster than Road Force, however, is
not recommended as the best choice for diagnostic use and vibration problem
solving.
After measuring the assemblies loaded runout, it prompts the operator “QuickMatch?
Yes or No”. Refer to “Rim Runout Measurements,” page 54. If the operator chooses
“Yes”, the GSP9700 will then prompt the operator to measure rim runout.
After measuring rim runout, the results will be shown on the “Current Runout” popup
screen.
NOTE: QuickMatch™ tire and wheel mounting procedure results
and benefits are not computed until rim runout is measured.
The “Current Runout” screen will display a message informing you if
QuickMatching™ will be beneficial.
LATERAL RIM RUNOUT
MEASUREMENT
RADIAL RIM RUNOUT
MEASUREMENT
ASSEMBLY DIAGNOSIS