OPERATION INSTRUCTIONS Form 5393-T, 11-08
Supersedes Form 5393T, 09-08
GSP9200 Series
Computerized LCD
Balancer
With SmartWeight® Balancing Technology
Software Version 2.6
© Copyright 2006 - 2008 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
AutoClamp
®
®
(optional)
Autostart
Servo-Stop
Maintenance & Calibration
Cleaning, Lubrication, and Maintenance of Adaptors, Hub, and Shaft
Calibrating the Balance
Calibrating the Dataset Arms
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
Split-Spoke
RimScan
Declined
Do’s and Don’ts of Wheel Balancing
Individuals and Date Trained
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
__________________________________ __________________________________
CONTENTS
1. GETTING STARTED ........................................................................................ 1
1.1 Introduction ................................................................................................................. 1
References............................................................................................................. 1
1.2 For Your Safety ........................................................................................................... 1
Hazard Definitions.................................................................................................. 1
IMPORTANT SAFETY INSTRUCTIONS............................................................... 2
Electrical................................................................................................................. 3
Decal Information and Placement.......................................................................... 3
Right Side View ............................................................................................... 3
Left Side View.................................................................................................. 4
Back View........................................................................................................ 4
Specific Precautions/BDC Laser Indicator............................................................. 5
Specific Precautions/HammerHead™ TDC Laser Indicator (Optional)................. 5
Specific Precautions/Power Source....................................................................... 5
Turning Power ON/OFF ......................................................................................... 6
Equipment Installation and Service ....................................................................... 6
Equipment Specifications....................................................................................... 7
Safety Summary .................................................................................................... 7
Explanation of Symbols................................................................................... 7
1.3 GSP9200 Components ............................................................................................... 8
Standard Accessories for Quick-Thread®.............................................................. 9
Standard Accessories for Optional Auto-Clamp™ ................................................ 9
1.4 Operating the Console ............................................................................................. 10
Using Softkeys ..................................................................................................... 10
Using Control knob .............................................................................................. 10
Primary Balancing Display ................................................................................... 11
Resetting the Program ......................................................................................... 11
2. BALANCING OVERVIEW ................................................................................ 1
2.1 Balance Forces ........................................................................................................... 1
Balancing Theory - Static Imbalance ..................................................................... 1
Balancing Theory - Couple Imbalance................................................................... 2
2.2 SmartWeight® Balancing Technology....................................................................... 3
Static and Dynamic Imbalance Sensitivity ............................................................. 3
2.3 SmartWeight® Dynamic Weight Planes .................................................................... 4
2.4 Using SmartWeight®................................................................................................... 4
Switching from SmartWeight® to Traditional Dynamic Balancing Modes ....... 5
2.5 WeightSaver® Wheel Balancing Feature .................................................................. 5
Weight Savings ...................................................................................................... 6
2.6 On-Vehicle Wheel Installation Methods.................................................................... 6
Hub Centric ............................................................................................................ 6
Lug Centric............................................................................................................. 7
3. BALANCING PROCEDURES .......................................................................... 9
3.1 Mounting the Wheel on the Balancer Spindle.......................................................... 9
Installing the Wheel Manually ................................................................................ 9
Installing the Wheel Using Quick-Thread® Wheel Clamping ............................... 10
Installing the Wheel Using Auto-Clamp™ Wheel Clamping (Optional) ............... 10
Mounting Error Detection Features...................................................................... 11
Front/Back Cone Mounting .................................................................................. 11
Using Plastic Wheel Mounting Washer................................................................ 12
Cone/Flange Plate Mounting ............................................................................... 14
Using the Pressure Ring and Spacers................................................................. 15
Pressure Ring................................................................................................ 15
Spacers ......................................................................................................... 15
GSP9200 Series Wheel Balancer Operation Instructions CONTENTS x i
3.2 Balance Primary Screen........................................................................................... 16
3.3 Wheel Assembly Selection for Saving Spin Data.................................................. 17
Saving Spin Data .................................................................................................17
Storing Measurements......................................................................................... 17
Print Summary ..................................................................................................... 18
3.4 Balance Modes.......................................................................................................... 18
SmartWeight® Balancing Technology .................................................................. 19
Dynamic Balancing – Traditional Balancing Mode ..............................................19
Static Balancing – Traditional Balancing Mode ................................................... 20
Static Balance Mode Reminder (Except Patch Balance).............................. 20
3.5 Balancing Procedures for Specific Weight Types and Placement ...................... 21
AUTO MODE Balancing Using All Weight Types and Locations ........................ 21
STANDARD Balancing Procedure Using Clip-On Weights ................................. 22
MIXED WEIGHTS Balancing Procedure Using a Combination of Clip-On &
Adhesive Weights ................................................................................................ 24
ADHESIVE WEIGHTS Balancing Procedure Using Adhesive Weights .............. 26
PATCH BALANCE® Procedure............................................................................ 28
3.6 Automatic Dataset® Arms Operation ...................................................................... 30
Automatic Weight Position Measurement............................................................ 30
Manual Weight Position Measurement ................................................................ 31
Measuring Dimensions for Standard Clip-on Weight Balancing.......................... 31
Measuring Dimensions for Mixed Weights (Clip-on/Adhesive) Balance.............. 32
Measuring Dimensions for Adhesive Weights Balancing .................................... 32
Servo-Aided Adhesive Weight Placement..................................................... 33
Manual Adhesive Weight Placement............................................................. 34
CenteringCheck® Wheel Centering Feature Using Imbalance Forces and
Location................................................................................................................ 35
4. BALANCING FEATURES AND OPTIONS.................................................... 39
4.1 Blinding and Rounding ............................................................................................ 39
4.2 Quick-Thread® Wheel Clamping .............................................................................. 39
4.3 Auto-Clamp™ Wheel Clamping (Optional)............................................................. 40
4.4 Motor Drive/Servo-Stop............................................................................................ 40
4.5 Spindle-Lok® Feature................................................................................................ 41
4.6 Hood Autostart Feature............................................................................................ 41
4.7 Loose Hub Detect Feature ....................................................................................... 41
4.8 Split Weight® Feature................................................................................................ 41
Split Weight® Operation .......................................................................................42
Correcting Large Imbalances............................................................................... 42
4.9 Split Spoke® Feature................................................................................................. 43
Hiding Adhesive Weight behind Spoke................................................................ 43
Re-entering Similar Wheel after Split Spoke® is Enabled.................................... 44
Placing Hidden Weight Inside of Hollow Spokes ................................................. 45
4.10 RimScan™ Wheel Profile Scanner........................................................................ 46
Setting Dimensions with RimScan....................................................................... 47
Real-Time Predictions with RimScan and SmartWeight®.................................... 50
4.11 BDC Laser Adhesive Weight Locator ................................................................... 51
4.12 Optional HammerHead™ TDC Laser Adhesive Weight Locator ......................... 51
Specific Precautions / HammerHead™ TDC Laser System................................ 53
4.12 Print Summary ........................................................................................................ 54
5. EQUIPMENT INFORMATION ........................................................................ 55
5.1 Software Identification ............................................................................................. 55
5.2 Program Cartridge Removal and Installation......................................................... 55
5.3 Balancer Set Up......................................................................................................... 56
Display Language ................................................................................................ 56
Printer................................................................................................................... 56
Printout Language................................................................................................ 56
Printout Paper Size Selection .............................................................................. 56
Hood Autostart Feature........................................................................................ 56
Servo-Stop ........................................................................................................... 56
ii x CONTENTS GSP9200 Series Wheel Balancer Operation Instructions
Weight Units......................................................................................................... 56
5.4 Service Mode Setup and Features .......................................................................... 56
Set Date and Time ............................................................................................... 57
Setting Up the Balance Limits.............................................................................. 57
Main Selections.................................................................................................... 57
Setting Up the Weight Units .......................................................................... 57
Setting Up the Ounce Round Amount........................................................... 57
Setting Up the Gram Round Amount............................................................. 57
Setting the Limits Displayed .......................................................................... 57
Non-SmartWeight Options ................................................................................... 58
Setting Up the Ounce Blind Amount.............................................................. 58
Setting Up the Gram Blind Amount ............................................................... 58
SmartWeight® Options - Setting Up the Force Limits .......................................... 58
WeightSaver® Residual Goal ........................................................................ 58
Prompt for Wheel Assembly ID............................................................................ 58
Spindle Type ........................................................................................................ 59
HammerHead™ ................................................................................................... 59
6. CALIBRATION AND MAINTENANCE ........................................................... 61
6.1 Calibration Procedures ............................................................................................ 61
Balancer (3 Spin Procedure)................................................................................ 62
Inner Dataset® Arm (Calibration Tool, 221-672-1, Required) .............................. 63
Outer Dataset® Arm (Calibration Tool, 221-672-1, Required) ............................. 65
Quick Calibration Check Procedure..................................................................... 67
6.2 Diagnostic Procedures............................................................................................. 67
Force Sensors...................................................................................................... 68
Keys and Switches............................................................................................... 68
Data Acquisition Circuits ...................................................................................... 68
Motor Drive........................................................................................................... 68
6.3 Printing....................................................................................................................... 68
6.4 Cleaning the Console ............................................................................................... 68
6.5 Maintenance .............................................................................................................. 69
Spindle Hub Face and Shaft................................................................................ 69
BDC Laser Adhesive Weight Locator Maintenance or Service ........................... 69
Optional HammerHead™ TDC Laser Clip-On Weight Locator Maintenance or
Service ................................................................................................................. 69
6.6 Mounting Cone Maintenance................................................................................... 70
7. GLOSSARY.................................................................................................... 71
GSP9200 Series Wheel Balancer Operation Instructions CONTENTS x iii
x
iv
CONTENTS GSP9200 Series Wheel Balancer Operation Instructions
1.1 Introduction
This manual provides operation instructions and information required to operate the
GSP9200 Series Balancer. Read and become familiar with the contents of this
manual prior to operating the GSP9200.
The owner of the GSP9200 is solely responsible for arranging technical training. The
GSP9200 is to be operated only by a qualified trained technician. Maintaining records
of personnel trained is solely the responsibility of the owner and management.
This manual assumes the technician has already been trained in basic balancing
procedures.
1. Getting Started
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 GSP9200. 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 “GSP9200 Components,”
page 8. 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
WARNING: Hazards or unsafe practices, which could result in
DANGER: Immediate hazards, which will result in severe personal
personal injury or product or property damage.
severe personal injury or death.
injury or death.
These symbols identify situations that could be detrimental to your safety and/or
cause equipment damage.
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started x 1
IMPORTANT SAFETY INSTRUCTIONS
Read all instructions before operating the GSP9200.Read and follow the instructions and
warnings provided in the service, operation and specification documents of the products with
which this GSP9200 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 GSP9200 Series Vibration
Control System 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.
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 (or AutoClamp is engaged and secure).
The safety hood must be closed before pressing the green “START” key, located on the right
front corner of the console, 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 LCD assembly, can be used for
emergency stops.
DANGER: Never reach under the hood while the balancer is performing a runout
measurement or balance spin.
2 x 1. Getting Started GSP9200 Series Wheel Balancer Operation Instructions
SAVE THESE INSTRUCTIONS
Electrical
The GSP9200 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.
WARNING: DO NOT ALTER THE ELECTRICAL PLUG. Plugging the
electrical plug into an unsuitable supply circuit will
damage the equipment.
This device is rated as Class A for radiated emissions.
In the event of radio interference, the display read out may flicker - this is normal.
Decal Information and Placement
NOTE: Decals and their placement may vary due to balancer
configuration and options.
Right Side View
Decal 128-963-2 gives the maximum wheel diameter, maximum wheel weight, and
maximum rotational frequency for the GSP9200.
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
rotation. Auto-Clamp models will have decal 128-1123-2 instead.
®
shaft
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started x 3
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 conjunction to caution the user to not
remove the screw because of the risk of electrical shock.
Back View
Decal 128-907-2 warns the user to place the GSP9200 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 conjunction to caution the user to not
remove the screw because of the risk of electrical shock.
4 x 1. Getting Started GSP9200 Series Wheel Balancer Operation Instructions
Specific Precautions/BDC Laser Indicator
The BDC (Bottom Dead Center) Laser Indicator is a class 1M laser designed to aid in
applying adhesive weights. The laser is not a field serviceable or adjustable part.
Use caution in regard to reflective materials around the laser and never look into the
laser beam
Specific Precautions/HammerHead™ TDC Laser Indicator (Optional)
The TDC (Top Dead Center) Laser Indicator is a class 2M laser designed to aid in
applying clip-on weights. The laser is not a field serviceable or adjustable part.
Use caution in regard to reflective materials around the laser and never look into the
laser beam.
Specific Precautions/Power Source
The GSP9200 is intended to operate from a power source that will apply 230VAC
+10% / -15%, 1 phase, 3 amp 50/60 Hz, power cable includes NEMA 20 amp plug,
L6-20P, 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 GSP9200 Series Vibration Control System,”
Form 5110T.
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started x 5
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.
NOTE: For information on converting from single phase NEMA
L6-20P plug to thee phase NEMA L15-20P plug refer to
Form 5350T, “NEMA L6-20P to NEMA L15-20P Power Plug
Conversion Instructions.”
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 about thirty-five seconds to “boot up.”
After the GSP9200 performs a self-check, the “Logo” screen will appear indicating
the unit is ready for use.
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
6 x 1. Getting Started GSP9200 Series Wheel Balancer Operation Instructions
Removal and Installation,” page 55.
Equipment Specifications
Electrical
Voltage: 230VAC +10% / -15%, 1 phase, 50/60 Hz,
power cable includes NEMA 20 amp plug,
L6-20P
Amperage: 3 amperes
Wattage: 795 watts (peak)
Air
Air Pressure Requirements: 100-175 PSI (6.9-12.0 bar)
Approximate Air Consumption: 4 CFM (110 Liters/Minute)
Atmospherics
Temperature:
Relative Humidity: Up to 95% Non-condensing
Altitude: Up to 6000 ft. (1829 m)
+32qF to +122qF (0qC to +50qC)
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.
Not intended for connection to public telecommunications network.
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started x 7
1.3 GSP9200 Components
8 x 1. Getting Started GSP9200 Series Wheel Balancer Operation Instructions
Standard Accessories for Quick-Thread®
A. 106-82-2 Sleeve, Scratch Guard for Small Cup
B. 175-353-1 Polymer Cup (4.5” O.D.)
C. 76-433-3 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. 221-659-2 Adhesive Weight Scraper
H. 223-68-1 Pressure Ring
I. 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.
Standard Accessories for Optional Auto-Clamp™
Kit 20-2077-1
A. 106-82-2 Sleeve, Scratch Guard for Small Cup
B. 175-353-1 Polymer Cup (4.5” O.D.)
C. 184-81-1 Auto-Clamp Hub Assembly
D. 221-658-2 Hammer Head Protectors (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
For optional accessories, refer to Wheel Balancer Brochure, Form 3203T.
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started x 9
mounting adaptors.
x
1.4 Operating the Console
Using Softkeys
The “softkeys,” located on the LCD support console directly beneath the LCD,
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,
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
change rows until the desired label is displayed.
Using Control knob
The control knob is located to the right of the softkeys. The control knob accesses the
on-screen switches and manually inputs data. The available on-screen switches are
dependent upon the setup configuration of the balancer.
. When this key is
to
10
1. Getting Started GSP9200 Series Wheel Balancer Operation Instructions
x
Pushing in on the control knob cycles through the available on-screen switches on the
current primary screen. Rotating the control knob clockwise or counter-clockwise
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 SmartWeight
®
/Standard
balance 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.
Primary Balancing Display
Resetting the Program
The wheel balancing program may be reset at anytime by using the key, located
on the LCD support console directly beneath the LCD. To reset the balancer, press
the reset key twice within a four-second period without pressing any other keys inbetween. 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.
GSP9200 Series Wheel Balancer Operation Instructions 1. Getting Started
11
2. Balancing Overview
2.1 Balance Forces
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
FRONT VIEW
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.
A statically imbalanced tire driven for an extended period may cause “cupping” in the
tire’s tread, create vibration, and adversely effect handling.
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.
CUPPING
GSP9200 Series Wheel Balancer Operation Instructions 2. Balancing Overview x 1
x
Balancing Theory - Couple Imbalance
Basically, dynamic imbalance is defined as a condition 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)
FRONT VIEW
ZERO STATIC IMBALANCE WITH LARGE
COUPLE IMBALANCE
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.
2. Balancing Overview GSP9200 Series Wheel Balancer Operation Instructions
2
x
2.2 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 check spins, chasing weights,
and saves the shop time and money.
®
SmartWeight
does SmartWeight
can reduce the number of steps in the balancing process. Not only
®
give the customer a better riding vehicle, it also helps the
environment by using less corrective weight, and speeds up the wheel balance
process which saves the shop time and money.
Static and non-rounding modes are eliminated to simplify operation. Always enter two
weight positions during wheel measurement in SmartWeight
functions are identical to the traditional balancing method. SmartWeight
®
mode. All other
®
automatically determines if a single weight is sufficient, or if two weight planes must
be corrected.
®
SmartWeight
will also compute the amount of weight saved over time. A histogram
of weight savings statistics can be viewed from the “wake-up” screen.
Static and Dynamic Imbalance Sensitivity
As a general rule of thumb, to achieve the best balance on an average sized tire and
wheel assembly (15 x 7 inch rim):
Residual static imbalance should be less than 1/4 ounce (7 grams).
Residual couple imbalance should be less than 3/4 ounce (21 grams) per
plane.
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.
NOTE: SmartWeight
For detailed information on adjustment and setup of modes of wheel balancing
sensitivity see Chapter 4, Balancing Features and Options.
®
balancing performs this check automatically.
GSP9200 Series Wheel Balancer Operation Instructions 2. Balancing Overview
3
x
2.3 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.
The GSP9200 balancer offers two primary ways to balance tires:
®
1. SmartWeight
2. Traditional balancing technology
balancing technology
Both of these methods can balance tires dynamically. The main difference is
SmartWeight
®
will reduce the amount of corrective weight in a basic wheel balancing
situation.
2.4 Using SmartWeight®
The SmartWeight® enabled balancing display varies slightly from the standard
balancing display. The primary difference between the displays is the SmartWeight
tire graphs that display the static and couple forces within a tire/wheel assembly.
The red-dotted line represents the acceptable amount of force the tire can have that
will not result in a ride problem. Any forces below that line will be shown in green.
Any forces that are above that level will be shown in red and indicate an excessive
amount of force.
®
The traditional “static” and “dynamic” modes are eliminated. The traditional non-round
off mode is eliminated. These modes are no longer necessary with SmartWeight
®
balancing.
Install the tire/wheel assembly as normal. Rim measurements are not required.
Lower the hood and spin.
If SmartWeight® requires correction weights wheel dimensions will be required. Enter
the dimensions using the dataset arms. The SmartWeight
®
tire graphs will display red
for excessive forces and green for acceptable amounts of force. Prior to
measurement the tire graphs will display no color.
2. Balancing Overview GSP9200 Series Wheel Balancer Operation Instructions
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The screen will display the amount and location of corrective weight necessary.
Install the weights in the appropriate manner using the correct type of weight and
lower the hood to re-spin and check the balance. Instead of displaying zeros in the
weight display, SmartWeight
®
displays “OK,” indicating that the force levels are
reduced to within the acceptable tolerances.
Switching from SmartWeight® to Traditional Dynamic Balancing Modes
At any time, SmartWeight® can be switched to standard balancing as long as both
standard and SmartWeight
Press the knob until SmartWeight
the knob till the standard balance icons appear. Cycle back the same way.
®
modes are enabled in setup.
®
is highlighted. Once highlighted, press and hold
2.5 WeightSaver® Wheel Balancing Feature
Essentially, SmartWeight® sets limits on the forces. WeightSaver® adjusts the
percentage of these forces to either save weight, or have a more fine-tuned balance.
With SmartWeight
WeightSaver
The WeightSaver
intentionally left in the assembly to save weights.
®
, and bar graph in the green is within acceptable limits.
®
allows that bar graph window to be changed.
®
wheel balancing feature is a percentage of the force limit
The lower the value favors a lower residual force and a higher value favors weight
savings. The following example is set at the default of 75%. A 75% residual goal
means that WeightSaver
remain. This saves more weight, saves time, and saves money.
GSP9200 Series Wheel Balancer Operation Instructions 2. Balancing Overview
®
allows 75% of the maximum allowed couple force to
5
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Weight Savings
Select from the main logo screen to view a statistical page of weight
savings classified by type of weight and rim diameter.
The page shows the amount of weight savings, highlighted in blue, using
SmartWeight
and percentage.
®
balancing technology. The savings are shown in both actual weight
The statistics can be cleared by selecting “Clear Data” from the second tier of
softkeys. This could be used if tracking weight during a specific period. The “Clear
Data” key may only be selected when in Service Mode. For more information refer to
“Service Mode Setup and Features,” page 56.
Select “Print Screen” to print the weight savings displayed.
2.6 On-Vehicle Wheel Installation Methods
Hub Centric
A hub centric wheel is aligned to the hub by the center bore of the wheel. The vehicle
weight rests on the hub bore. The clearance between the hub bore and the hub on a
hub centric wheel is between 0.003 and 0.004 of an inch. A hub centric wheel is
identified by removing the lug nuts (or bolts) and moving the wheel up, down, and
side-to-side. If there is little or no movement, the wheel is centered by the hub.
To verify if the wheel is hub centric:
Remove the lug nuts (or bolts) and try to move the wheel up/down and
side/side on the hub.
If the wheel has no appreciable movement around or about the centerline of
the hub, it should be considered hub centric.
A hub centric wheel will have very little (0.003 – 0.004”) clearance or a slip fit to
the hub.
2. Balancing Overview GSP9200 Series Wheel Balancer Operation Instructions
6
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Lug Centric
A lug centric wheel is identified by removing the lug nuts (or bolts) and moving the
wheel up, down, and side-to-side. If movement around the hub is apparent, the wheel
is centered on the vehicle by the lugs or studs of the axle flange.
TIP: When mounting a lug centric wheel to a vehicle, extreme
centering care must be taken by ensuring the lug nuts (bolts)
are tightened equally, while rotating the wheel.
“Step-torque” star pattern to proper torque specification.
To verify if the wheel is lug centric:
Remove the lug nuts (or bolts) and try to move the wheel up/down and
side/side on the hub.
A lug centric wheel will display noticeable movement.
GSP9200 Series Wheel Balancer Operation Instructions 2. Balancing Overview
7
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3. Balancing Procedures
3.1 Mounting the Wheel on the Balancer Spindle
CAUTION: Use only cones and accessories that are specifically
designed for the GSP9200.
Since today’s vehicle designs are lighter and more sensitive to road feel, it is critical
to achieve the best balance. Proper balance requires that the tire/wheel assembly be
centered on the balancer. Tire/wheel assemblies can be balanced to zero, even with
the tire/wheel assembly mounted off-center. The main objective of the balancer
operator is to center the wheel on the hub and shaft, using the best available method.
Mounting the wheel off-center creates incorrect measurements of imbalance and
runout conditions.
Remove any existing wheel weights, rocks, and debris from the tire tread, and clean
the center hole of the wheel. Inspect inside of wheel for excessive accumulation of
dirt and debris. Remove if necessary before balancing.
Accurate balancing depends on accurately centering the wheel. Choose the proper
wheel mounting cone by placing it in the center hole of the wheel to be balanced.
NOTE: If the basic cone and adaptors do not fit the wheel, additional
centering adaptors will be necessary. A wheel that cannot be
properly centered, cannot be properly balanced. All balancers
require additional centering adaptors to properly center
certain types of wheels. For additonal information, refer to
Form 3203T for optional accessories.
Installing the Wheel Manually
With the safety hood open, place the wheel mounting cone on the spindle shaft
against the captivated spring. Position the wheel with the inside surface facing the
balancer, centered on the cone.
Install the plastic clamping cup and wing nut on the spindle shaft against the wheel
and secure the entire assembly by firmly tightening the wing nut.
Depress and hold down the Spindle-Lok
Holding the shaft locked while tightening the wing nut improves centering accuracy.
®
foot pedal while tightening the wing nut.
Slowly roll the wheel towards you while tightening the wing nut. This improves
accurate wheel centering, since the wheel is allowed to roll up the taper of the cone
as opposed to forcing it to slide up the cone.
GSP9200 Series Wheel Balancer Operation Instructions 3. Balancing Procedures
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