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Hunter Road Force Elite GSP9700 Series Operating Instructions Manual

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Form 7118-TE-05, 04-18
Supersedes Form 7118-TE-05, 11-17
Road Force
Elite GSP9700
®
Series Wheel Balancer
Operation Instructions
Copyright © 2016-2018 Hunter Engineering Company

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Summary of Contents for Hunter Road Force Elite GSP9700 Series

  • Page 1 Form 7118-TE-05, 04-18 Supersedes Form 7118-TE-05, 11-17 Road Force Elite GSP9700 ® Series Wheel Balancer Operation Instructions Copyright © 2016-2018 Hunter Engineering Company...

  • Page 2: Owner Information

    Tire Stack Operation Printout Selection Installation & Training Acknowledgement: I, the undersigned, do hereby acknowledge that my Hunter Engineering Wheel Balancer has been installed and is operational. I also acknowledge that the above technicians have been trained to my satisfaction in those areas of safety and operation as indicated above.

  • Page 3: Table Of Contents

    Contents 1. Getting Started ............. . . 5 1.1 Introduction .
  • Page 4 Using the Pressure Ring and Spacers ..........21 Pressure Ring .
  • Page 5 Road Force Savings ............. . . 46 ®...
  • Page 6 6.1 Calibration Procedures ..............67 eCal™...

  • Page 7: Getting Started

    This manual assumes the technician has already been trained in basic balancing procedures. Corporate Information Hunter Engineering Company 11250 Hunter Drive Bridgeton, MO 63044 U.S.A. Phone: 314-731-3020 / Fax: 314-731-1776 Web: www.hunter.com...

  • Page 8: For Your Safety

    Do not operate equipment with a damaged cord or equipment that has been dropped or damaged until a ALWAYS WEAR OSHA APPROVED SAFETY Hunter Service Representative has examined it. GLASSES. Eyeglasses that have only impact resistant lenses are NOT safety glasses.

  • Page 9: Save These Instructions

    Never reach under the hood while the balancer is performing a runout measurement or balance spin. SAVE THESE INSTRUCTIONS Electrical The Hunter Road Force Elite GSP9700 Balancer ® 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.

  • Page 10: Front View

    Front View Left Side View FDA standards for Class 2M laser compliance are shown Decal 128-391-2-00 cautions that the unit may on Decal 128-1155-2 (for TDC Units ). automatically start upon closing of the hood when Hood Autostart is enabled. 128-1155-2 128-391-2-00 Figure 3.

  • Page 11: Back View

    Back View Decal 128-381-2 warns the operator not to remove the cover of the Road Force Elite / GSP9700 because of the risk of electrical shock and not to use below garage floor level. ETL certification standards are outlined on Decal 128- 1120-2.

  • Page 12: Specific Precautions/Optical Scan Laser

    Turning Power ON/OFF For information on converting from single phase NEMA L6-20P plug to thee phase NEMA L15- Push Button Switch 20P plug refer to Form 5350-T, “NEMA L6-20P to NEMA L15-20P Power Plug Conversion The Road Force Elite GSP9700 is equipped with a ®...

  • Page 13: Equipment Installation And Service

    Not intended for connection to public telecommunications network. Figure 13. Equipment Installation and Service Only a Hunter Factory-Authorized Representative should perform installation. This equipment contains no operator serviceable parts. All maintenance and repairs must be referred to a qualified Hunter Service Representative.

  • Page 14: Road Force ® Elite Gsp9700 Main Screen Components

    1.3 Road Force Elite GSP9700 Main Screen Components ® 1. Tire Stack / Vehicle Plan View Tab 9. Imbalance and Couple Force Display 2. Load Roller 10. Road Force Limits Display 3. Clip Weight Plane 11. Road Force Wheel Assembly Display 4.

  • Page 15: Road Force ® Elite Gsp9700 Components

    1.4 Road Force Elite GSP9700 Components ® TOUCH SCREEN DISPLAY SAFETY HOOD WEIGHT TRAY OUTER CAMERA LOAD ROLLER BULLSEYE™ CENTERING SYSTEM COLLET STORAGE SPINDLE SHAFT INNER CAMERA FOOT PEDAL INFLATION STATION Figure 14. GETTING STARTED...

  • Page 16: Operating The Balancer

    1.5 Operating the Balancer Main Balance Screen - Tire Rash After a Road Force spin (or StraightTrak ), a colored ® ® Main Balance Screen road rash will appear on the tire. This signifies the measured Road Force of the assembly, and ®...

  • Page 17: Main Balance Screen - Enable And Disable Load Roller

    Main Balance Screen – Enable and Disable Load As soon as the balance portion of the spin is complete, weights will appear on the screen. Roller To enable or disable the load roller in the main balance screen, touch the load roller on the screen to cycle through all available options.

  • Page 18: Main Balance Screen - Road Force ® Buttons

    Main Balance Screen – SmartWeight Buttons ® Touching the SmartWeight button expands a set ® of button options. SmartWeight can be disabled or ® enabled, Performance Mode can be disabled or enabled and Weight savings can be viewed. Figure 23. Main Balance Screen –...

  • Page 19: Balancing Procedures

    2. Balancing 2.1 Wheel Lift Operation Procedures Raising the Wheel Assembly When operating the wheel lift, make sure to maintain two-handed control of the wheel assembly. Slide the appropriate Bullseye™ Centering System collet onto the spindle shaft. Position wheel lift carriage at the end of the wheel lift rail.

  • Page 20: Centeringcheck ® Wheel Centering Feature

    2.2 CenteringCheck Wheel Centering 2.3 Front / Back Collet Mounting ® Feature Collet mounting is one of the most common and reliable ways to mount wheels on balancers. CenteringCheck ® The Bullseye™ Centering System is a set of collets that CenteringCheck is an inspection or verification of the ®...

  • Page 21: Front Collet Mounting

    2.4 Specialized Mounting Conditions standard clamp cup will not properly contact the wheel hub area. In these cases, the optional nine inch alloy wheel pressure cup may be used in place of the clamping Collet / Flange Plate Mounting cup. Some wheels may be centered using the lugholes and SCRATCH 9-INCH ALLOY...

  • Page 22: Set Flange Plate For A Wheel As Follows

    Insert the end of pin through the intersecting For Ford 7 X 150 mm lug pattern, align the index slot in the guide. index pin to the 150 mm mark and insert the remaining six pins, 135-378-1, into the #7 Push down on the pin and rotate the pin a quarter slots.

  • Page 23: Disassemble Flange Plate Set-Up As Follows

    1. Determine the cone (or collet) that best fits the center Using the Pressure Ring and Spacers bore of the wheel to be balanced. Choose the cone the contacts the wheel nearest to the center of the Pressure Ring cone. The pressure ring clips on to the wing nut.

  • Page 24: Wheel Assembly Selection For Saving Spin Data

    2.5 Wheel Assembly Selection for 2.6 Balance Modes Saving Spin Data SmartWeight Balancing Technology ® Saving Spin Data The Road Force Elite GSP9700 automatically tracks the ® wheel assembly currently being balanced. The balancer assumes that the technician is working “around the vehicle”...

  • Page 25: Static Balancing - Traditional Balancing Mode

    2.7 Inflation Station standard and SmartWeight balancing modes are ® enabled in setup. Inflation Station provides preset tire pressure setting to Touch the SmartWeight button to display the ® ensure accurate Road Force Measurement (before and ® SmartWeight menu buttons. ®...

  • Page 26: Quick-Thread ® Wheel Clamping

    2.8 Quick-Thread Wheel Clamping ® Quick-Thread is an “intelligent” DC drive motor control ® feature that allows motor assisted threading for fast installation and removal of the Road Force Elite ® GSP9700 wing nut. Keep clear of clamping components during Quick-Thread shaft rotation.

  • Page 27: Motor Drive/Servo-Stop And Spindle-Lok

    2.9 Motor Drive/Servo-Stop and 2.10 Safety Hood Features Spindle-Lok ® Hood Autostart Motor Drive/Servo-Stop The balancer can be set to automatically spin the wheel upon hood closure. After a spin, the hood must be raised The intelligent DC motor drive on the Road Force Elite ®...

  • Page 28: Balancing Procedures For Specific Weight Types And Placement Using Truweight

    2.11 Balancing Procedures for Single Weight Placement Specific Weight Types and Placement Occasionally, regardless of the weight mode, a single using TruWeight™ tape weight is shown in the middle of the wheel. Place the weight as shown on-screen. The crucial task is to line up the center of the weight with the laser line.
  • Page 29 Figure 50. The Road Force Elite GSP9700 will rotate the wheel ® Figure 47. to TDC for the next weight plane. The view of the wheel will also change to the next plane view and the weight After wheel comes to a complete stop, raise the safety amount for the next plane will be displayed in green.

  • Page 30: Balancing Procedure Using A Combination Of Clip-On & Adhesive (Tape) Weights (Mixed Weights)

    Left and right weight plane displays should show “OK” The Road Force Elite GSP9700 will find the top-dead- ® after the check spin. center (TDC) for the first weight plane if “Servo-Stop” is enabled. “Servo-Stop” will hold the wheel in the TDC position while the weight is applied.

  • Page 31: Balancing Procedure Using Adhesive (Tape) Weights

    The Road Force Elite GSP9700 inner camera quickly Balancing Procedure Using Adhesive (Tape) ® locates and marks adhesive weight positioning. Weights Figure 60. LEFT PLANE LEFT RIGHT DIAMETER DIAMETER Figure 58. The laser locator automatically displays a vivid line at bottom dead center after a wheel has been spun.

  • Page 32: Enable Dragging Feature

    The Road Force Elite GSP9700 Servo-Activated Laser ADHESIVE WEIGHTS balancing procedure is complete. ® automatically locates adhesive weight positioning. Enable Dragging Feature The Enable Dragging feature allows the user to drag tape weights to a specific area of the wheel where he or she would like to place weights.

  • Page 33: Rim Dimension Manual Entry

    2.12 Rim Dimension Manual Entry Rim Dimension Manual Entry - Tape/Tape In the event of an SmartScan™ failure, balancing can still be performed by using a tape measure to manually input rim dimensions. Press the dimension button on in the upper left-hand portion of the screen.
  • Page 34 Press the dimension button on in the upper left-hand portion of the screen. Figure 71. Figure 74. Press the Manual Entry button in the upper right-hand portion of the screen. Figure 72. Use a tape measure to measure the lengths called out Figure 75.

  • Page 35: Blinding And Rounding

    2.13 Blinding and Rounding 2.14 Tape Weight Menu In non-SmartWeight mode the balancer can display By touching a weight on the wheel, such as the strips of ® either an “actual” or “blinded and rounded” amount of weight shown below, a weight style menu will appear. imbalance.

  • Page 36: Split Spoke ® Feature

    2.15 Split Spoke Feature 2.16 Optional HammerHead ® ® Laser Clip-On Weight Locator When in either mixed weight or adhesive weight modes, (dynamic or static), correction weights can be hidden The balancer will find the TDC for the left or right weight behind the spokes of a wheel.

  • Page 37: Specific Precautions / Hammerhead ® Tdc Laser System

    Specific Precautions / HammerHead ® Laser System Use caution in regard to reflective materials around the laser and never look into the laser beam Figure 79. Use of controls, adjustments, or performance of procedures other than those specified herein may result in hazardous radiation exposure.
  • Page 38 BALANCING PROCEDURES...

  • Page 39: Smartweight Balancing

    3. SmartWeight ® 3.1 SmartWeight Balancing ® Technology Balancing SmartWeight Balancing Technology is not a procedure. ® Rather, it is a technology that measures the forces of couple side-to-side shimmy and static up-and-down shake and computes the correction weight required to reduce these forces.

  • Page 40: Smartweight ® Balancing Technology Dynamic Weight Planes

    3.2 SmartWeight Balancing 3.3 Using SmartWeight Balancing ® ® Technology Dynamic Weight Planes Technology SmartWeight requires the operator to enter at least two The SmartWeight balancing forces display varies greatly ® ® weight planes. This balancing method will automatically from the standard balancing display. SmartWeight tire ®...

  • Page 41: Switching From Smartweight ® Balancing Technology To Traditional Dynamic Balancing

    Prior to balance spin, the tire graphs will display no color. Switching from SmartWeight Balancing ® The SmartWeight balance force graphs will display red ® Technology to Traditional Dynamic for excessive forces and green for acceptable amounts of Balancing force. At any time, SmartWeight Balancing Technology can ®...

  • Page 42: Switching From Traditional Dynamic Balancing To Traditional Static Balancing

    Switching from Traditional Dynamic Enable Performance Mode Balancing to Traditional Static Balancing. In SmartWeight mode, the balancer can be switched to ® performance mode. In non-SmartWeight mode, the balancer can be ® switched from dynamic balancing to static balancing. Touch the Enable Performance Mode button. Dynamic mode is selected: Show Savings Touch the Show Savings button.

  • Page 43: Road Force Measurement ® Procedures

    4. Road Force 4.1 Load Roller Operation Measurement ® The load roller runs parallel to the tire and applies a perpendicular load on the assembly to take information required for the Road Force Measurement system. It ® Procedures is capable of applying up to 1400 pounds of force. The amount of force placed on the tire is dependent upon the tire’s diameter and stiffness.

  • Page 44: Road Force ® With Limits Enabled

    4.2 Forcematching Road Force with Limits Enabled ® ® When the load roller is enabled, “LT Tires,” “P-SUV Forcematching is a method of aligning the stiffest spot ® Tires,” or “P Tires” Road Force limits can be changed. ® of the radial tire road force first harmonic (once-per- revolution component) with the average low point of the Changing the “LT Tires,”...

  • Page 45: Forcematching ® - No Runout

    Buttons on the right allow the operator to return to the main balance screen, view details and plots, and change the data being viewed. Touching “Show After ForceMatching” will change the 3D scene (matching up the chalk marks and showing the resulting Road Force change in the color spectrum on ®...

  • Page 46: Match Codes

    ® results between multiple tire and rim assemblies. They are especially helpful when high Road Force values are ® encountered. The former Hunter MatchMaker feature ® used a similar system. When a tire and rim assembly are balanced using ForceMatch , a number (match code) is displayed above ®...

  • Page 47: Encountering Forcematch ® Prediction Errors

    The progress bar at the top of the screen indicates to the Use a tire changer and rotate the rim 180 degrees operator how far along the procedure has progressed. relative to the tire, aligning the “V” mark with the valve stem.

  • Page 48: Do's And Don'ts Of Road Force ® Measurement

    each measurement. Always inflate tires to the • Use the approved adaptors for the Road Force Elite ® recommended pressure specified by the vehicle GSP9700. Use approved wing nut provided and manufacturer. tighten with two hands to ensure full clamping force. •...

  • Page 49: Straighttrak ® Lfm (Lateral Force Measurement)

    4.3 StraightTrak LFM (Lateral Force ® If Auto Hood is enabled, the hood will raise Measurement) automatically. StraightTrak is an optional feature that corrects vehicle ® Perform any tire/wheel Force Matching required to ® pull problems by suggesting that the tires be placed at reduce radial Road Force disturbances.

  • Page 50: Disabling Straighttrak

    The screen will show the fourth wheel spun and automatically assign tag 4 to the assembly. Figure 116. The vehicle plan view will show the net tire pull (if any) for Figure 119. the two measured tire/wheel assemblies. After tagging the fourth tire/wheel assembly, the vehicle Mount the third tire/wheel assembly on the Road Force ®...

  • Page 51: Interpreting The Tire Stack

    Interpreting the Tire Stack Touching the “Tire Stacking” tab button shows the vehicle plan view in a simplified form. It shows only the net pull on the assembly after having spun four assemblies. Figure 122. The vehicle plan can be expanded to show individual Road Force measurements, individual lateral force ®...

  • Page 52: Changing Tag Numbers

    When the first tire/wheel assembly is ready to be tagged, the only option will be to tag it as tag 1. The second tire/wheel assembly will default to tag 2, however you may change it to tag 1 dragging and dropping the tag to the second location.

  • Page 53: Removing A Tire From The Stack

    Figure 132. Figure 130. Road Force ® Since this wheel has not been balanced, a “Not Touching the “Hide Road Force” button will turn off the Balanced” icon appears on the left edge of the Road Force listings for all assemblies. ®...

  • Page 54: Printout

    axle, and the tire/wheel assembly with the lowest Road Use “Mileage:” to display the vehicle mileage. Force will be placed on the driver’s side of the front axle. ® Use “VIN:” to display the vehicle identification number. Printout Touching the “Print” button will allow the operator to print summary information.

  • Page 55: Extra Info

    4.4 Individual Lateral Force Extra Info Measurement. When viewing the extended plan view, detailed information about each assembly may be viewed by Lateral force can be measured on individual tire/wheel touching “Touch For Extra Info”. assemblies. The Individual Lateral Force Measurement procedure can be launched by touching the “Road Force ”...

  • Page 56: Road Force ® Savings

    Road Force Savings ® Savings generated through prevented comebacks using the Road Force roller can also be viewed. ® Touch the Road Force button. ® In the Road Force menu, touch the Show Savings ® button. The Road Force savings screen will be displayed. ®...

  • Page 57: Equipment Information

    5. Equipment 5.1 Tools Information The Tools button contains equipment information and set up options. Quick Calibration Check Quick Calibration Check allows the operator to check balancer calibration. From the main balance screen, touch the “Tools” button. Figure 144. Touch the “Quick Calibration Check” button. Figure 145.

  • Page 58: Reset All" Button

    From the main balance screen, touch the “Tools” button. When the selection is made, touch “OK” to save or “Cancel” to abandon. Figure 148. Touch the “Advanced” button. Figure 149. Touch the “Set Up” button. Figure 154. To scroll up or down in the list of items, either press the “Up”...

  • Page 59: Display Language

    When printing to a USB drive, the drive must contain a volume “name”. The USB drive must first be “named” using your laptop or another PC then plug it in an open USB port. Use the one on the neck for easy removal to print on a Touch the arrow to the right of the listed printer.

  • Page 60: Rim Interior Light

    enabled, which allows pushing the wheel (approximately 1/8 of a revolution) to cause the intelligent DC motor drive to automatically rotate the wheel to the next weight or ForceMatch Mark positions. Touching the “START” key ® or the weight amounts or locations may still be used for this function.
  • Page 61 Figure 169. Figure 166. Note: If the exact profile of the 3M tape Touch the “Set Up” button. weight(s) to be used is not shown, select the closest match.Physically hold the 3M tape weight(s) up to the screen. When prompted for adding balance weight, touch the weight icon on the rim.

  • Page 62: Runout Units

    Inflation Station Units In this example, tags 1, 2 and 4 are 26.7 inches in diameter. Tag 3 is 27.4 inches in diameter. Selects psi, bar or kPa units for air pressure, or disable TranzSaver™ has identified the deviation. the option altogether. By dragging 3 to the correct wheel in the stack, the Runout Units TranzSaver™...

  • Page 63: Rim Dimension Manual Entry

    Figure 175. Figure 177. Touch the inner rim dimension box. Instructions will Rim Dimension Manual Entry appear explaining how to measure the inner distance dimension. In the event of an SmartScan™ failure, balancing can still be performed by using a tape measure to manually input rim dimensions.

  • Page 64: Volume Control

    Volume Control To set up a desired time zone, touch “Edit Time Zone”. Selects the volume output for both the beep and click sounds. Video volume is adjustable on the selected video screen. Touch the desired time zone. Touch “Set Time Zone” to save.

  • Page 65: Diagnostics

    Figure 192. Figure 187. Identify Software Select the desired calibration procedure and follow the From the main balance screen, touch the “Tools” button. on-screen instructions. Diagnostics Figure 193. From the main balance screen, touch the “Tools” button. Touch the “Advanced” button. Figure 188.

  • Page 66: Maintenance History

    Figure 198. Touch the “Identify Software” button. Figure 199. Touch the “Show Authorization” button. Figure 205. Clean Threads Figure 200. The Electronic Key Authorization screen is displayed. From the main balance screen, touch the “Tools” button. Figure 206. Touch the “Clean Threads” button. Figure 207.

  • Page 67: Balance Bare Rim

    Figure 209. Figure 213. Touch the “Balance Rim With Tire” button to return to Balance Bare Rim standard balancing. From the main balance screen, touch the “Tools” button. Figure 214. Figure 210. Touch the “Balance Bare Rim” button. Figure 211. The balance screen is displayed with a bare rim.

  • Page 68: Usb Program Flash Drive And Security Key Removal And Installation

    5.2 USB Program Flash Drive and Security Key Removal and Installation Turn power to balancer OFF. Remove the rear cover from the support assembly for the LCD display by removing the six screws. Set the rear cover and attaching hardware aside. Insert the USB program flash drive(s) into open USB sockets on the Mini-ITX/Atom Motherboard.

  • Page 69: Calibration And Maintenance

    6. Calibration and 6.1 Calibration Procedures Maintenance eCal™ Auto-Calibration The Road Force Elite GSP9700 utilizes eCal™ ® automatic calibration. Once the balancer is calibrated at installation time, no further operator input is required. Calibration Procedures Using calibration procedures, the operator can calibrate the following systems: •...

  • Page 70: Diagnostic Tools

    Figure 228. Most of the diagnostic data is for the sole purpose of conveying information to the Hunter Service Representative. The service representative may request information from these screens to diagnose service concerns.

  • Page 71: Switches

    The Data Acquisition Circuits screen is displayed. The eCal™ screen is displayed. Figure 230. Figure 234. Touch the “eCal History” button. Switches Touch the “Switches” button. Figure 235. Choose which eCal history timeframe to view. The eCal Figure 231. history is displayed. The Switches screen is displayed.

  • Page 72: Spindle Encoder

    The Test Force Sensors screen is displayed. The Explanation screen is displayed. Follow the on- screen instructions. Figure 239. Figure 245. Spindle Encoder The Test Loaded Runout Sensor screen is displayed. Touch the “More...” button. Figure 240. Touch the “Spindle Encoder” button. Figure 241.

  • Page 73: Cleaning The Console

    6.3 Cleaning the Console Spindle Hub Face and Shaft Keep the shaft and wing nut threads clean and lubricated. When cleaning the console, use window cleaning solution Lubricate the shaft without contaminating the hub face. to wipe off the display console and cabinet. Do not spray Run the edge of a rag between the threads while the window cleaning solution directly onto LCD.

  • Page 74: Optional Hammerhead ® Tdc Laser Clip-On Weight Locator Maintenance Or Service

    6.4 Mounting Collet Maintenance Optional HammerHead TDC Laser Clip-On ® Weight Locator Maintenance or Service Keep the mounting collets clean and lubricated. Lubricate with a coating of light lubricant with Teflon such as Caution! Use of controls or adjustments ® Super Lube by Loctite.

  • Page 75: Maintenance Schedule

    Monthly • Inspect inlet air filter/dryer - clean, replace as necessary Semi-Annually Preventative maintenance visit by Hunter Service Representative which will include all the above in addition to the following: • Perform audit check (quality report for vibration control system) •...

  • Page 76: Parts Warranty Summary

    TCR1 power units. • All lift and Hunter TCR1 power units are warranted for a period of two (2) years. • Normal wear items are not covered with the exception of batteries, which are covered for a period of six (6) months.

  • Page 77: Theory Of Operation

    7. Theory of Operation 7.1 Harmonic Vibrations A vibration in a tire and rim assembly can be caused by: Imbalance Change in Sidewall Stiffness (Force Variation) Rim Bent/Out-of-Round Tire Out-of-Round Wheel to Axle Mounting Error* Brake Component Wear or Failure* Drivetrain or Engine Component Wear or Failure* Vehicle Component Characteristics* Combination of Some or All Factors...

  • Page 78: Road Force ® And Runout Measurement

    7.2 Road Force and Runout During Forcematching , the first harmonic vibration of ® ® the tire is matched opposite of the first harmonic vibration Measurement of the rim to decrease the first harmonic vibration of the assembly. This reduces the vibration felt inside of the Road Force Measurement emulates tire uniformity ®...

  • Page 79: Tire Radial Force Variation (Uniformity)

    7.3 Radial Force Variation (RFV) It is important that the air pressure of the tire is set to specifications prior to the Road Force Radial force variation is a term describing the direct Measurement®. Incorrect tire pressure will measurement of the tire uniformity forces under load, affect the results.

  • Page 80: Summarization

    of the tire will reduce or increase the eccentricity of the hidden constructional issues in the tire are not taken assembly when rolling under load. into consideration when unloaded runout is measured. Unloaded runout measurement can not indicate how Runout Measurement is a distance measurement not much force is being created as a result of the runout a force.

  • Page 81: Radial Force Variation Vs. Unloaded Run Out

    7.4 Radial Force Variation vs. Road Force Elite GSP9700 measures loaded runout ® and tire stiffness simultaneously so the magnitude of the Unloaded Run Out vibration force that occur when the assembly is mounted on a vehicle in known. In the manufacturing community, tire uniformity is called radial force variation.

  • Page 82: Road Force ® Vibration Placed Into Perspective

    7.5 Road Force Vibration Placed into 7.6 StraightTrak Lateral Force ® ® Perspective Measurement System In the past, most tire/wheel assembly vibration was StraightTrak Lateral Force Measurement ® considered balance related. Because of this, tire service professionals tend to relate tire/wheel vibration in terms Although a vehicle’s suspension checks out to be of balance weight.

  • Page 83: Theory

    StraightTrak With the StraightTrak Lateral Force Measurement (LFM) ® ® the potential to dramatically reduce the number of trial feature, the Hunter Road Force Elite GSP9700 Series ® configurations and test drives. Road Force Measurement System can measure the ®...

  • Page 84: Plysteer

    Plysteer Plysteer induces a dog-tracking attitude of the vehicle. When large net plysteer variations on an axle are encountered, the steering wheel will change position and possibly end up crooked to maintain a straight direction of travel. The vehicle, however, will not necessarily drift or change lanes when the steering wheel is released.

  • Page 85: Glossary

    A unit of frequency: one disturbance per second. CenteringCheck Hub Centric Hunter feature that ensures the wheel is properly centered when mounted on the balancer. The wheel is centered using the center hole of the wheel. GLOSSARY...
  • Page 86 Inflation Station A feature on models of the Road Force Elite GSP9700 ® A specifically designed wheel/tire assembly that does not that automatically inflates or deflates tires to a use the traditional rim lip/bead design. PAX assemblies predetermined air pressure. require adhesive or patch balancing.
  • Page 87 Road Force Measurement Split Weight ® ® A measurement of the wheel assembly as would be Feature designed to reduce single heavy amounts of found from an actual road test of a vehicle. The Road weight by dispersing the corrective weight over a wider Force Elite GSP9700 is equipped with a load roller to area.

  • Page 88: Wheel Width

    Wheel Offset The measured distance between the mounting face of the wheel and the centerline of the rim. Wheel Width Dimension measured on the inside of the rim between the bead seats. GLOSSARY...
  • Page 89 THIS PAGE INTENTIONALLY LEFT BLANK...
  • Page 90 www.Hunter.com...