OPERATION INSTRUCTIONS
Supersedes Form 4202T, 07-05
Form 4202T, 11-05
GSP9700 Series
Road Force Measurement
System
With SmartWeight™ Balancing Technology
Software Version 5.0
Copyright 1997-2005 Hunter Engineering Company
OWNER INFORMATION
Model Number ____________________________________________________________________
Software Version Number ___________________________________________________________
Serial Number ____________________________________________________________________
Date Installed_____________________________________________________________________
Service and Parts Representative _____________________________________________________
Phone Number____________________________________________________________________
Sales Representative_______________________________________________________________
Phone Number____________________________________________________________________
Concept and Procedure Training Checklist
Trained
Safety Precautions
Quick-Thread
Autostart
Servo-Stop
Maintenance & Calibration
Cleaning, Lubrication, and Maintenance of Adaptors, Hub, and Shaft
Calibrating the Balancer
Calibrating the Load Roller and Dataset Arms
Calibrating the Inflation Station
Mounting the Wheel/Tire Assembly
Verifying Mounting Repeatability with Centering Check® Feature
Cone Mounting
Pressure Ring and Spacers
Flange Plate and Cone Mounting
Wheel Balancing
SmartWeight™
Standard
Mixed Weights
Adhesive Weights with Auto Dataset Arms
Split-Spoke
Patch Balancing with Auto Dataset Arms (optional)
Declined
Do’s and Don’ts of Wheel Balancing
Road Force Measurement and ForceMatching™
Adjusting P/SUV/LT Limits
Assembly Measurements
Applying Previous Wheel Measurements
Applying Previous Tire Measurements
Wheel Measurement with Dataset Arms
Tire Installed
Bare Rim
Road Force Measurement First Harmonic Diagnosis Screen
“Current Runout and Force Variation”
“Diagnosis Explanation” and “Details” Screens
Match Codes
MatchMaker Procedure Explained
Do’s and Don’ts of Road Force Measurement
Individuals and Date Trained
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
CONTENTS
1. GETTING STARTED........................................................................................1
1.1 Introduction.................................................................................................................1
1.2 For Your Safety ........................................................................................................... 1
Hazard Definitions.................................................................................................. 1
IMPORTANT SAFETY INSTRUCTIONS
Electrical.................................................................................................................3
Decal Information and Placement.......................................................................... 4
Right Side View...............................................................................................4
Left Side View..................................................................................................5
Back View........................................................................................................6
Specific Precautions/Power Source....................................................................... 7
Turning Power ON/OFF......................................................................................... 7
Equipment Installation and Service .......................................................................8
Equipment Specifications....................................................................................... 8
Electrical.......................................................................................................... 8
Air .................................................................................................................... 8
Atmospherics...................................................................................................8
Sound Pressure Level..................................................................................... 8
Safety Summary ....................................................................................................8
Explanation of Symbols...................................................................................8
1.3 Equipment Components ............................................................................................ 9
Standard Balancer Accessories........................................................................... 10
1.4 Operating the Console ............................................................................................. 11
Using Softkeys.....................................................................................................11
Primary Balancing Display................................................................................... 12
Using the Control Knob (GSP9712).....................................................................12
Using Control Knobs (GSP9702).........................................................................13
Resetting the Program......................................................................................... 13
Using the Screen Saver/Merchandising Display..................................................13
........................2
2. BALANCING OVERVIEW..............................................................................15
2.1 Balancing Modes ......................................................................................................15
SmartWeight™ Balancing Technology................................................................ 15
Balancing Theory................................................................................................. 15
Static Imbalance............................................................................................ 15
Couple Imbalance..........................................................................................16
Static and Dynamic Imbalance Sensitivity........................................................... 17
2.2 Identifying the Static Balance Weight Plane.......................................................... 18
2.3 Identifying the Dynamic Balance Weight Planes................................................... 19
2.4 SmartWeight™ Dynamic Weight Planes ................................................................ 20
3. MOUNTING WHEELS ON THE BALANCER ................................................21
3.1 Mounting the Wheel Using Wheel Lift (Optional) .................................................. 21
Raising the Tire/Wheel Assembly........................................................................21
Lowering the Tire/Wheel Assembly.....................................................................23
3.2 Mounting the Wheel (Without Wheel Lift)...............................................................23
Mounting Error Detection Features...................................................................... 24
Front/Back Cone Mounting..................................................................................24
Using Plastic Wheel Mounting Washer................................................................26
Cone/Flange Plate Mounting ............................................................................... 27
Expandable Collet Mounting................................................................................28
Using the Pressure Ring and Spacers................................................................. 28
Pressure Ring................................................................................................28
Spacers .........................................................................................................29
CenteringCheck®..................................................................................................30
3.3 On-Vehicle Wheel Mounting Methods ....................................................................33
Hub Centric..........................................................................................................33
Lug Centric........................................................................................................... 33
GSP9700 Series Road Force Measurement System Operation Contents i
4. BALANCING A WHEEL................................................................................. 35
4.1 Balancing Procedures.............................................................................................. 35
SmartWeight™ Balancing Technology................................................................ 35
Using SmartWeight™....................................................................................35
Switching from SmartWeight™ to Traditional Dynamic Balancing Modes....37
Dynamic Balancing Selection ..............................................................................37
Static Balancing Selection ...................................................................................37
Static Balance Mode Reminder for “Dynamic Balance Importance” (Except
Patch Balance)..............................................................................................38
Selecting Weight Types and Placement Modes..................................................39
STANDARD Balancing Procedure (Using Clip-On Weights)........................39
MIXED WEIGHTS Balancing Procedure (Combination of Clip-On &
Adhesive Weights).........................................................................................41
ADHESIVE WEIGHTS Balancing Procedure (Adhesive Weights Only).......43
PATCH BALANCE® Procedure.....................................................................45
4.2 Using the Auto Dataset® Arms ................................................................................48
Automatic Weight Position Measurement............................................................48
Manual Weight Position Measurement................................................................ 48
Measuring Dimensions for Standard Clip-on Weight Balancing.......................... 49
Measuring Dimensions for Mixed Weights (Clip-on/Tape-on) Balance...............49
Measuring Dimensions for Adhesive Weights Balancing (Tape-on/Tape-on).... 50
Measuring 20 Inch or Larger Rims.......................................................................51
Adjustable Length Inner Dataset Arm ........................................................ 51
Servo-Aided Adhesive Weight Placement.....................................................51
Manual Adhesive Weight Placement.............................................................53
Rim Runout Measurements.................................................................................54
Single Arm Rim Runout External Measurement (Tire and Wheel Assembly)54
Dual Arm Rim Runout External Measurement (Tire and Wheel Assembly).54
Rim Runout Measurement (Bare Rim)..........................................................56
4.3 Primary and Popup Screens....................................................................................57
Primary Screen Selection ....................................................................................57
Balance Primary Screen......................................................................................58
4.4 Load Roller ................................................................................................................ 60
Load Roller Operation..........................................................................................60
4.5 ForceMatching™.......................................................................................................61
ForceMatching™ Procedures..............................................................................62
ForceMatching™ Using Previous Bare Rim Measurement.................................63
ForceMatching™ Using Previous Road Force™ Measurement.......................... 63
Using ForceMatch Codes Feature.......................................................................64
Dial Indicator Gauges Feature.............................................................................64
Lateral/Radial Rim High Spot Indicators Feature ................................................65
Details/Diagnosis Explanation Key......................................................................65
Encountering ForceMatching™ Prediction Errors ...............................................65
Do’s and Don’ts of Road Force Measurement.................................................. 66
4.6 QuickMatch™ Tire and Wheel Mounting................................................................ 66
QuickMatch™ Procedures...................................................................................67
QuickMatch™ Using Previous Bare Rim Measurement......................................68
QuickMatch™ Using Previous Loaded Runout Measurement............................68
Dial Indicator Gauges Feature.............................................................................68
Lateral/Radial Rim High Spot Indicators Feature ................................................69
Encountering ForceMatching™ or QuickMatching™ Prediction Errors...............69
Do’s and Don’ts of Loaded Runout Measurement............................................... 70
4.7 StraightTrak® LFM (Lateral Force Measurement) ..................................................70
Disabling StraightTrak®........................................................................................73
Vehicle Plan View ................................................................................................ 74
Net Tire Pull Arrow...............................................................................................74
Road Force Arrows...........................................................................................74
Changing Tag Numbers.......................................................................................75
Show Least Pull ................................................................................................... 76
Show Least Vibration........................................................................................... 76
Show Alternate Placements.................................................................................76
ii Contents GSP9700 Series Road Force Measurement System Operation
Show Details........................................................................................................77
Determining Tire Conicity Outliers.................................................................77
Printout................................................................................................................. 77
Inflation Pressure................................................................................................. 78
4.8 Quick-Thread™ Feature...........................................................................................78
4.9 Motor Drive/Servo-Stop............................................................................................79
4.10 Spindle-Lok® Feature.............................................................................................. 79
4.11 Hood Autostart Feature..........................................................................................79
4.12 Loose Hub Detect Feature ..................................................................................... 79
4.13 Blinding and Rounding ..........................................................................................80
4.14 Inflation Station.......................................................................................................81
5. BALANCING FEATURES AND OPTIONS ....................................................83
5.1 SmartWeight™ Balancing Technology................................................................... 83
5.2 WeightSaver™ Wheel Balancing Feature............................................................... 84
5.3 Quick-Thread™ Feature...........................................................................................84
5.4 Motor Drive/Servo-Stop............................................................................................85
5.5 Spindle-Lok® Feature................................................................................................ 85
5.6 Hood Autostart Feature............................................................................................86
5.7 Loose Hub Detect Feature ....................................................................................... 86
5.8 Inflation Station.........................................................................................................86
5.9 Split Weight® Feature ...............................................................................................87
Split Weight® Operation.......................................................................................87
Correcting Large Imbalances...............................................................................88
5.10 Split Spoke® Feature............................................................................................... 88
Hiding Adhesive Weight behind Spoke................................................................ 88
Re-entering Similar Wheel after Split Spoke® is Enabled.................................... 90
Placing Hidden Weight Inside of Hollow Spokes................................................. 91
5.11 MatchMaker™ Tire and Wheel Mounting Procedure........................................... 93
Tires Mounted on Rims........................................................................................93
Tires Not Mounted to Rims..................................................................................94
5.12 Diagnosis Explanation Screen (Limits Disabled)................................................95
5.13 Diagnosis Explanation Screen (Limits Enabled).................................................95
5.14 Details Screen.........................................................................................................96
5.15 Print Summary ........................................................................................................97
5.16 Harmonics & T.I.R. Data/Plots ............................................................................... 98
Assembly Data Plots Screen ............................................................................... 98
Tire Data Plots Screen.........................................................................................99
5.17 Statistics................................................................................................................100
Show Statistics................................................................................................... 100
Weight Savings..................................................................................................101
Rim Data Plots Screen....................................................................................... 102
6. EQUIPMENT INFORMATION ......................................................................103
6.1 Software Identification ........................................................................................... 103
6.2 Program Cartridge Removal and Installation.......................................................103
6.3 Balancer Set Up ......................................................................................................104
GSP9700 Series Road Force Measurement System Operation Contents iii
Setting Up the Display Language......................................................................105
Setting Up the Printout Language......................................................................105
Setting Up the QuickMatch® Feature.................................................................105
Setting Up the Use Limits Feature.....................................................................106
Setting Up the Screen Saver Time-out..............................................................106
Setting Up the Hood Autostart Feature.............................................................. 107
Setting Up the Servo-Stop/Servo-Push.............................................................107
Setting Up the Quick-Thread™ Feature............................................................108
Setting Up the Balance Check Spin...................................................................108
Setting Up the Weight Units...............................................................................108
Setting Up the Inflation Station Units................................................................. 109
Setting Up the Runout Units .............................................................................. 109
Setting Up the Road Force Units.......................................................................109
Setting Up the Prompted Inflation Station..........................................................110
Setting Up the Prompted Centering Checks......................................................110
6.4 Service Mode Setup and Features ........................................................................ 111
Setting Up the Runout & Road Force Limits...................................................111
Setting the “P” Limits...................................................................................111
Setting the “P/SUV” Limits...........................................................................111
Setting the “LT” Limits .................................................................................112
Setting the Limits to “Factory Default”......................................................... 112
Programmed Road Force Limits...............................................................112
Setting Up the Balance Limits............................................................................113
Main Selections...........................................................................................113
Setting Up the Weight Units ........................................................................113
Setting Up the Ounce Round Amount.........................................................113
Setting Up the Gram Round Amount...........................................................113
Setting the Limits Displayed........................................................................113
Non-SmartWeight Options ..........................................................................113
Setting Up the Ounce Blind Amount............................................................113
Setting Up the Gram Blind Amount.............................................................113
SmartWeight™ Options - Setting Up the Force Limits................................114
WeightSaver™ Residual Goal.....................................................................114
Setting Up the Inner Dataset Arm Type.............................................................114
Setting Up the Console Type.............................................................................115
Setting Up the Load Roller Type........................................................................ 115
7. CALIBRATION AND MAINTENANCE......................................................... 116
7.1 Calibration Procedures .......................................................................................... 116
Balancer (3 Spin Procedure)..............................................................................117
Inner Dataset® Arm (Calibration Tool, 221-672-1, Required)............................118
Outer Dataset® Arm (Calibration Tool, 221-672-1, Required) ...........................121
Load Roller (Calibration Tool, 221-672-1, Required).........................................123
Servo-Stop.........................................................................................................125
Quick Calibration Check Procedure...................................................................126
7.2 Diagnostic Procedures...........................................................................................126
Force Sensors....................................................................................................127
Rotary Encoders ................................................................................................127
Keys and Switches.............................................................................................127
Data Acquisition Circuits....................................................................................127
Dataset® Arm Sensors.......................................................................................127
Loaded Runout Sensor......................................................................................127
7.3 Printing.....................................................................................................................127
Changing Ribbon Cartridge (P/N 162-42-2): ..................................................... 128
Bottom Feed Paper Loading..............................................................................128
7.4 Cleaning the Console .............................................................................................128
7.5 Spindle Hub Face and Shaft Maintenance ........................................................... 129
7.6 Mounting Cone Maintenance.................................................................................129
8. THEORY OF OPERATION ..........................................................................131
8.1 Harmonic Vibrations...............................................................................................131
8.2 Road Force™ Measurement .................................................................................. 133
Force Variation................................................................................................... 133
Tire Radial Force Variation (Uniformity)......................................................134
8.3 Radial Force Variation (RFV) ................................................................................. 134
8.4 Radial Force Variation vs. Unloaded Run Out .....................................................135
8.5 Road Force Vibration Placed into Perspective.................................................135
8.6 StraightTrak® Lateral Force Measurement System.............................................136
StraightTrak® Lateral Force Measurement ........................................................136
Tire Pull Measurement and Correction........................................................136
Theory................................................................................................................137
Conicity........................................................................................................138
Plysteer........................................................................................................138
Net Tire Pull.................................................................................................138
9. GLOSSARY .................................................................................................139
9.1 Balancing Terms..................................................................................................... 139
iv Contents GSP9700 Series Road Force Measurement System Operation
1.1 Introduction
The GSP9700 Series Road Force Measurement System is a wheel balancer with the
added capabilities of measuring tire/wheel Road Force, Lateral Force, Assembly, and
Wheel runout.
The GSP9700 simulates a “road test”, with a unique “load roller” which applies up to
1400 pounds of force against the rotating assembly. The roller measures the loaded
runout of the assembly (deflection while under load) and automatically recommends
corrections when needed. The GSP9700 technology eliminates many of the time
consuming, subjective, and often non-productive manual measurements previously
used to diagnose and repair ride disturbance concerns. The operation of this
diagnostic tool is discussed later in this manual.
1. Getting Started
This manual provides operation instructions and information required to operate the
GSP9700. Read and become familiar with the contents of this manual prior to
operating the GSP9700.
The owner of the GSP9700 is solely responsible for arranging technical training. The
GSP9700 is to be operated only by a qualified trained technician. Maintaining records
of personnel trained is solely the responsibility of the owner and management.
“References”
This manual assumes that you are already familiar with the basics of tire balancing.
The first section provides the basic information needed to operate the GSP9700. The
following sections contain detailed information about equipment operation and
procedures. “Italics” are used to refer to specific parts of this manual that provide
additional information or explanation. For example, Refer to “Equipment
Components,” page 9. These references should be read for additional information to
the instructions being presented.
1.2 For Your Safety
Hazard Definitions
Watch for these symbols:
CAUTION: Hazards or unsafe practices, which could result in minor
personal injury or product or property damage.
WARNING: Hazards or unsafe practices, which could result in
DANGER: Immediate hazards, which will result in severe personal
These symbols identify situations that could be detrimental to your safety and/or
cause equipment damage.
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 1
severe personal injury or death.
injury or death.
IMPORTANT SAFETY INSTRUCTIONS
When using your garage equipment, basic safety precautions should always be
followed, including the following:
Read all instructions before operating the GSP9700.
Read and follow the instructions and warnings provided in the service, operation and
specification documents of the products with which this GSP9700 is used (i.e.,
automobile manufacturers, tire manufacturers etc.).
Do not operate equipment with a damaged cord or equipment that has been dropped
or damaged until a Hunter Service Representative has examined it.
Always unplug equipment from electrical outlet when not in use. Never use the cord
to pull the plug from the outlet. Grasp plug and pull to disconnect.
If an extension cord is necessary, a cord with a current rating equal to or more than
that of the equipment should be used. Cords rated for less current than the
equipment may overheat. Care should be taken to arrange the cord so that it will not
be tripped over or pulled.
Verify that the electrical supply circuit and the receptacle are properly grounded.
To reduce the risk of electrical shock, do not use on wet surfaces or expose to rain.
Verify the appropriate electrical supply circuit is the same voltage and amperage
ratings as marked on the balancer before operating.
WARNING: DO NOT ALTER THE ELECTRICAL PLUG. Plugging the
electrical plug into an unsuitable supply circuit will
damage the equipment and may result in personal
injury.
To reduce the risk of fire, do not operate equipment near open containers of
flammable liquids (gasoline).
Read and follow all caution and warning labels affixed to your equipment and tools.
Misuse of this equipment can cause personal injury and shorten the life of the
balancer.
Keep all instructions permanently with the unit.
Keep all decals, labels, and notices clean and visible.
To prevent accidents and/or damage to the balancer, use only Hunter GSP9700
Series Road Force MeasurementSystem recommended accessories.
Use equipment only as described in this manual.
Never stand on the balancer.
Wear non-slip safety footwear when operating the balancer.
Keep hair, loose clothing, neckties, jewelry, fingers, and all parts of body away from
all moving parts.
Do not place any tools, weights, or other objects on the safety hood while operating
the balancer.
2 1. Getting Started GSP9700 Series Road Force Measurement System Operation
ALWAYS WEAR OSHA APPROVED SAFETY GLASSES. Eyeglasses that have only
impact resistant lenses are NOT safety glasses.
Keep the safety hood and its safety interlock system in good working order.
Verify that the wheel is mounted properly and that the wing nut is firmly tightened
before spinning the wheel.
The safety hood must be closed before pressing the green “START” key, located on
the right front corner of the CRT assembly, to spin the wheel.
Hood Autostart will cause the balancer shaft to spin automatically upon hood closure.
For the next Autostart, the safety hood has to be lifted to the full up position and then
closed.
Raise safety hood only after wheel has come to a complete stop. If safety hood is
raised before the spin is completed, the weight values will not be displayed.
Do not let cord hang over any edge or contact fan blades or hot manifolds.
The red “STOP” key, located on the right front corner of the CRT assembly, can be
used for emergency stops.
Electrical
The GSP9700 is manufactured to operate at a specific voltage and amperage rating.
Make sure that the appropriate electrical supply circuit is of the same voltage and
amperage ratings as marked on the balancer.
Make sure that the electrical supply circuit and the appropriate receptacle is installed
with proper grounding.
To prevent the possibility of electrical shock injury or damage to the equipment when
servicing the balancer, power must be disconnected by removing the power cord
from the electrical power outlet.
After servicing, be sure the balancer ON/OFF switch is in the “O” (off) position before
plugging the power cord into the electrical power outlet.
This device is rated as Class A for radiated emissions.
DANGER: Never reach under the hood while the balancer is
performing a Road Force Measurement or balance
spin.
SAVE THESE INSTRUCTIONS.
WARNING: DO NOT ALTER THE ELECTRICAL PLUG. Plugging the
electrical plug into an unsuitable supply circuit will
damage the equipment.
In the event of radio interference, the display read out may flicker - this is normal.
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 3
Decal Information and Placement
Right Side View
Decal 128-963-2 gives the maximum wheel diameter, maximum wheel weight, and
maximum rotational frequency for the GSP9700.
Decal 128-605-2-00 cautions the user that spindle rotation may occur with foot pedal
depression and to keep clear of clamping components during Quick-Thread™ shaft
rotation.
4 1. Getting Started GSP9700 Series Road Force Measurement System Operation
Left Side View
Decal 128-391-2-00 cautions that the unit may automatically start upon closing of the
hood when hood Autostart is enabled.
Decal 128-229-2 and decal 128-905-2 work in conjun ction to caution the user to not
remove the screw because of the risk of electrical shock.
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 5
Back View
Decal 128-907-2 warns the user to place the GSP9700 at garage floor level, and not
in a recessed area, to avoid the possibility of flammable fume ignition.
Decal 128-229-2 and decal 128-905-2 work in conjun ction to caution the user to not
remove the screw because of the risk of electrical shock.
6 1. Getting Started GSP9700 Series Road Force Measurement System Operation
Specific Precautions/Power Source
The GSP9700 is intended to operate from a power source that will apply 230 volts
(208 - 240), 1 phase, 50/60 Hz between the supply conductors of the power cord.
The power cord supplied utilizes a twist lock connector, NEMA L6-20P. This machine
must be connected to a 20 amp branch circuit. Please refer all power source issues
to a certified electrician. Refer to “Installation Instructions for GSP9700 Series Road
Force Measurement System,” Form 4203T (for GSP9702) or “Installation
Instructions for GSP9712 Series Road Force Measurement System,” Form 4972T
(for GSP9712).
CAUTION: A protective ground connection, through the grounding
conductor in the power cord, is essential for safe operation.
Use only a power cord that is in good condition.
Turning Power ON/OFF
The ON/OFF switch is located on the back of the balancer cabinet. To turn the
balancer “ON,” press the “I” side of the ON/OFF switch. To turn the balancer “OFF,”
press the “O” side of the ON/OFF switch.
The system requires only a few seconds to “boot up.” During “boot up,” the system
will generate a high-pitched tone until the software is loaded and running.
After the GSP9700 performs a self-check, the “Logo” screen will appear indicating
the unit is ready for use.
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 7
Equipment Installation and Service
A factory-authorized representative should perform installation.
This equipment contains no user serviceable parts. All repairs must be referred to a
qualified Hunter Service Representative.
NOTE: To replace program cartridge, refer to “Program Cartridge
Removal and Installation,” page 103.
Equipment Specifications
Electrical
Voltage: 230 volts (208 - 240), 1 phase, 50/60 Hz
Amperage: 15 amperes
Wattage: 3450 watts (peak)
Air
Air Pressure Requirements: 100-175 PSI (6.9-12.0 bar)
Approximate Air Consumption: 4 CFM (110 Liters/Minute)
Atmospherics
Temperature:
+32F to +122F (0C to +50C)
Relative Humidity: Up to 95% Non-condensing
Altitude: Up to 6000 ft. (1829 m)
Sound Pressure Level
Equivalent continuous A-weighted sound pressure at operator’s
position does not exceed 70 dB (A).
Safety Summary
Explanation of Symbols
These symbols may appear on the equipment.
Alternating current.
Earth ground terminal.
Protective conductor terminal.
l ON (supply) condition.
OFF (supply) condition.
Risk of electrical shock.
Stand-by switch.
8 1. Getting Started GSP9700 Series Road Force Measurement System Operation
Not intended for connection to public telecommunications network.
1.3 Equipment Components
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 9
GSP9712
Standard Balancer Accessories
A. 106-82-2 Sleeve, Scratch Guard for Small Cup
B. 175-353-1 Polymer Cup (4.5” O.D.)
C. 76-371-3 Quick Take-Up Wing Nut with Handles
D. 221-658-2 Hammer Heads (4)
E. 46-320-2 Spacer
F. 221-589-2 Weight Hammer/Pliers
G. 20-1650-1 Rim Tags
H. 221-659-2 Adhesive Weight Scraper
I. 223-68-1 Pressure Ring
J. 65-72-2 Calibration Weight
NOTE: Hunter wheel balancers do not include a standardized set of
mounting adaptors.
For optional accessories, refer to Wheel Balancer Brochure, Form 3203T.
10 1. Getting Started GSP9700 Series Road Force Measurement System Operation
1.4 Operating the Console
Using Softkeys
The “softkeys,” located on the CRT support console directly beneath the CRT,
provide operator control of the balancer. The keys are identified as:
K1 key
K2 key
K3 key
K4 key
Menu shift key
Start key
Stop key
Reset key
The four menu labels that appear at the bottom of each video screen are referred to
as the “softkey labels.” Each label indicates the action that the program takes when
the corresponding K1, K2, K3, or K4 key is pressed.
The display between the “K2” and “K3” labels indicates how many rows of labels are
available. Most screens have only one or two rows, however more rows are possible.
The green box indicates the row that is currently displayed.
The menu row is changed by pressing the menu shift key,
. When this key is
pressed, the menu labels change to the next row down. If the last row is currently
displayed, the menu labels change to the first row.
Throughout this manual, the statement press “nnnnnnn” means press the softkey
with the label “nnnnnnn.” If the required label is not on the current menu, press
to
change rows until the desired label is displayed.
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 11
Primary Balancing Display
Using the Control Knob (GSP9712)
The control knob is located to the right of the softkeys. The control knob is used to
control the on-screen switches and manually input data. The on-screen switches that
are available are dependent upon the setup configuration of the balancer.
MENU
SHIFT
KEY
START
KEY
STOP
KEY
RESET
KEY
K1 KEY
K2 KEY
CONTROL KNOB ACCESSED ON-SCREEN SWITCHES
K3 KEY
K4 KEY
CONTROL
KNOB
Pushing in on the control knob cycles through the on-screen switches that are available
on the current primary screen. Rotating the control knob clockwise or counter-clo ckwise
changes the setting for the selected on-screen switch.
For example, in the “Balance” primary screen, pushing in on the control knob will cycle
through the grams to ounces, the static and dynamic, and the load roller on-screen
switches. After selecting an on-screen switch, the setting may be selected by rotating
the control knob. The “selected” switch is the one showing the hand.
12 1. Getting Started GSP9700 Series Road Force Measurement System Operation
Using Control Knobs (GSP9702)
The control knobs are located to the right of the CRT screen. The control knobs are
used to control the on-screen switches and to manually input data. The control knobs
are identified as the upper, middle, and lower control knobs. The on-screen switches
that are available are dependent upon the current mode of the balancer.
For example, in the “Balance” primary screen, the upper knob (1) controls the grams
to ounces on-screen switch. The middle knob (2) controls the static, dynamic and
non-rounding on-screen switch, and the lower knob (3) controls the load roller and
P/LT tires on-screen switch.
1
2
3
Resetting the Program
The wheel balancing program may be reset at anytime by using the “ R ” key,
located on the CRT support console directly beneath the CRT. To reset the balancer,
press the reset key twice within a four-second period without pressing any other keys
in-between. This prevents a single accidental keystroke from resetting the system.
When the balancer is reset, the information collected for the wheel balance in
progress is erased and the display returns to the “Logo” screen.
Using the Screen Saver/Merchandising Display
If the CRT displays the same image for a long time, the image may become “burned
in” and will be visible even when the display is turned “OFF.” This is a characteristic
of all computer CRT displays. Therefore, after the designated time has passed, the
screen saver will appear on the CRT if “Screen Saver” is not disabled.
CONTROL KNOBS
ON-SCREEN
SWITCHES
NOTE: The system is still running when the screen saver is enabled.
When any “softkey” is pressed or the spindle turned, the program will reappear on the
CRT. This keystroke or spindle movement is recognized only by the screen saver
program and will not affect the balancer program. After the screen is on, additional
key presses will operate the program normally.
NOTE: The screen saver is not affected by rotating the control
GSP9700 Series Road Force Measurement System Operation 1. Getting Started 13
knob(s).
14 1. Getting Started GSP9700 Series Road Force Measurement System Operation
2. Balancing Overview
2.1 Balancing Modes
SmartWeight™ Balancing Technology
SmartWeight™ balancing technology is a method of reducing forces on a wheel
during balancing. This results in less weight used, and less time balancing tires.
SmartWeight is not a procedure. Instead, it measures the forces of side-to-side
shimmy and up-and-down shake and computes weight to reduce these forces. This
reduces the amount of weight, reduces time, reduces chec k spins and chasing
weights, and saves the shop time and money.
SmartWeight can reduce the number of steps in the balancing process.
Balancing Theory
Static Imbalance
As the word static implies, the tire will be balanced when at rest. For example, if an
unmoving assembly was centered on a cone and was balanced, it would be statically
balanced. A “bubble balancer” is designed to statically balance a tire/wheel
assembly.
IMBALANCE
FORCE
STATIC IMBALANCE
Static imbalance is where there is one amount of weight located in the center of the
tire/wheel assembly causing an imbalance. As the weight rotates, centrifugal forces
are created causing the wheel to lift as the weight reaches top dead center. This
lifting motion causes the tire/wheel assembly to move “up and down” creating a
bounce to be felt. This static imbalance condition is evident by a “jiggle” or up-down
movement of the steering wheel. These vibrations may also be apparent in the body,
with or without steering wheel shake.
FRONT VIEW
CUPPING
A statically imbalanced tire driven for an extended period may cause “cupping” in the
tire’s tread, create vibration, and adversely effect handling.
GSP9700 Series Road Force Measurement System Operation 2. Balancing Overview 15
Static balancing alone is a seldom-recommended procedure. For example, a single
weight is commonly placed on the inner clip weight position for cosmetic purposes.
This is not a recommended practice and usually insures the assembly is not properly
dynamically balanced. The assembly may then experience side-to-side imbalance
while in motion, causing a shimmy condition and objectionable vibration.
Couple Imbalance
In general terms, dynamic imbalance is defined as where one or more locations of
the tire/wheel assembly are heavier causing an imbalance force and/or an imbalance
wobble. Shown below is a tire/wheel assembly with two heavy spots of equal weight
which are located 180 degrees radially from each other on opposite sides. As this
assembly rotates, centrifugal forces cause a large imbalance wobble to be created,
but the imbalance force (as well as the static imbalance) will be zero. A wheel with
this condition will cause a wobble or shimmy to be felt in the steering wheel.
Excessive dynamic imbalance of this type creates a shimmy that transfers through
the suspension components to the occupants of the vehicle, especially at higher
speeds.
IMBALANCE WOBBLE
(LATERAL TWIST OR TORQUE)
ZERO STATIC IMBALANCE WITH LARGE
COUPLE IMBALANCE
FRONT VIEW
16 2. Balancing Overview GSP9700 Series Road Force Measurement System Operation
Modern “dynamic” balancers spin the wheel in order to measure both the up and
down imbalance force and the wobble or shimmy related imbalance (side-to-side).
Dynamic balancers direct the operator to place correction weights on the inside and
outside correction locations of the rim so that both imbalance shake (static) and
imbalance wobble (couple) will be eliminated.
SmartWeight may also utilize a single weight placement to balance out shake and
shimmy forces.
Static and Dynamic Imbalance Sensitivity
As a general rule of thumb, to achieve the best balance on an average sized tire and
wheel (15x6) assembly.
Residual static imbalance should be less than 1/4 ounce.
Residual couple imbalance should be less than 3/4 ounce.
Residual couple imbalance is preferred over remaining static imbalance.
It takes much more residual couple imbalance to cause a vibration than the same
amount of static imbalance.
The larger the diameter used for weight placement, the smaller the amount of
correction weight is required.
The wider the distance between the two weight placement locations, the smaller the
amount of correction weight is required.
If static balance is the only option, always verify that the remaining couple residual
imbalance is within acceptable tolerance.
For detailed information on adjustment and setup of modes of wheel balancing
sensitivity see section 5.1 and section 6.4.
GSP9700 Series Road Force Measurement System Operation 2. Balancing Overview 17
2.2 Identifying the Static Balance Weight Plane
In “STANDARD BALANCE” mode, using only a clip-on weight, the plane is input as
follows:
For static balancing, it is recommended that you place half of the correctional weight
value on each side of the tire to reduce residual dynamic imbalance.
In “MIXED WEIGHTS BALANCE” mode and “ADHESIVE WEIGHTS BALANCE”
mode, using an adhesive weight, the plane is input as follows:
DIAMETER
For static balancing, it is recommended that the adhesive weight be placed as close
to the center of the wheel as possible to reduce residual dynamic imbalance.
In “PATCH BALANCE” mode, using a patch weight, the plane is input as follows:
DIAMETER
For static balancing, it is recommended that the patch weight be placed as close to
the center of the tread as possible to reduce residual dynamic imbalance.
18 2. Balancing Overview GSP9700 Series Road Force Measurement System Operation
2.3 Identifying the Dynamic Balance Weight Planes
The balancer must know the location of the two weight circle planes for placement of
correction weights on the wheel assembly.
Each plane is described by a distance from the balancer and a diameter.
MIXED WEIGHTSST ANDARD PATCHADHESIVE WEIGHTS
RIM LIP / RIM LIP RIM LIP / INNER RIM SURFACE
INNER RIM SURFAC E /
INNER RIM SURFAC E
INNER TIRE SURFACE /
INNER TIRE SURF ACE
In “STANDARD BALANCE” mode, using only clip-on weights, left and right planes
are input as follows:
In “MIXED WEIGHTS BALANCE” mode, using clip-on and adhesive weights, the left
and right planes are input as follows:
In “ADHESIVE WEIGHTS BALANCE” mode, left and right planes are input as
follows:
GSP9700 Series Road Force Measurement System Operation 2. Balancing Overview 19
In “PATCH BALANCE” mode, using patch weights, left and right planes are input as
follows:
LEFT DISTANCE
DIAMETER
RIGHT DISTANCE
2.4 SmartWeight™ Dynamic Weight Planes
SmartWeight requires the operator to enter two weight planes. This balancing
method will automatically determine if one or both weight planes require a weight to
be added. This eliminates “blinded” static single plane balancing, which alone may
not be sufficient to solve vibration issues.
20 2. Balancing Overview GSP9700 Series Road Force Measurement System Operation
3. Mounting Wheels on the Balancer
3.1 Mounting the Wheel Using Wheel Lift (Optional)
The Wheel Lift is an optional feature on the GSP9700 series balancer. For
instructions on mounting the tire/wheel assembly without the optional wheel lift, refer
to “Mounting the Wheel,” page 23.
Raising the Tire/Wheel Assembly
Press the lift control handle “down” until the trolley carriage is at its lowest level.
Slide the appropriate mounting cone onto the spindle.
UP
LIFT CONTROL
DOWN
HANDLE
With the trolley carriage extended all the way out to the right, roll the tire/wheel
assembly onto the trolley carriage.
TROLLEY
CARRIAGE
Raise the lift control handle “up” to move the lifting beam and trolley into a position
where the tire/wheel assembly can be installed onto the spindle.
GSP9700 Series Road Force Measurement System Operation 3. Mounting Wheels on the Balancer 21
Slide the tire/wheel assembly onto the spindle and center on the mounting cone.
A
Verify that the tire/wheel assembly is centered vertically on the spindle. Refer to
“Mounting the Wheel,” page 23.
TIRE/WHEEL
SSEMBLY CENTERED
VERTICALLY ON
SPINDLE
SPINDLE
Install the clamping cup and wing nut on the spindle shaft against the wheel and
secure the entire assembly by firmly tightening the wing nut, while depressing the
foot pedal to hold the spindle in place.
With the tire/wheel assembly secured to the GSP9700, press the lift control handle
“down” until the trolley carriage is at its lowest level.
NOTE: The trolley carriage will also retract to its lowest level
Service the tire/wheel assembly as necessary. Refer to “Balancing a Wheel,” page 35
for specific operation instructions.
22 3. Mounting Wheels on the Balancer GSP9700 Series Road Force Measurement System Operation
automatically when the hood is closed.
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