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Hunter GSP9720JLR Operation Instructions Manual

Road force measurement system, with smartweight balancing technology software version 3.0
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OPERATION INSTRUCTIONS
GSP9700 Series
Wheel Balancer
Road Force Measurement
With SmartWeight
Software Version
®
Balancing Technology
3.0
© Copyright 2008-2009 Hunter Engineering Company
Supersedes Form 5827-T, PRELIMINARY, 12-08
(GSP9720JLR)
®
System
Form 5827-T, 09-09

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Summary of Contents for Hunter GSP9720JLR

  • Page 1 OPERATION INSTRUCTIONS Form 5827-T, 09-09 Supersedes Form 5827-T, PRELIMINARY, 12-08 GSP9700 Series Wheel Balancer (GSP9720JLR) ® Road Force Measurement System ® With SmartWeight Balancing Technology Software Version © Copyright 2008-2009 Hunter Engineering Company...
  • Page 3 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 Declined † † Safety Precautions ® Quick-Thread AutoClamp (optional) Autostart Servo-Stop...
  • Page 4 † † 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 ®...

  • Page 5: Table Of Contents

    Mounting Error Detection Features..............30 Front/Back Cone Mounting .................. 30 Using Plastic Wheel Mounting Washer..............31 Cone/Flange Plate Mounting ................33 Expandable Collet Mounting ................34 Using the Pressure Ring and Spacers..............34 CONTENTS x i GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 6 Forcematching Using Previous Road Force® Measurement ......86 Using ForceMatch Codes Feature ............... 86 Dial Indicator Gauges Feature ................87 Lateral/Radial Rim High Spot Indicators Feature ..........87 Details/Diagnosis Explanation Key ..............87 Encountering Forcematch® Prediction Errors ............. 88 ii x CONTENTS GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 7 Prompted Inflation Station.................. 114 Prompted Centering Checks................114 Runout & Road Force® Limits ................114 Balance Limits....................116 Main Selections....................116 Non-SmartWeight Options ................. 117 SmartWeight® Options - Setting Up the Force Limits ........117 CONTENTS x iii GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 8 7.4 Radial Force Variation vs. Unloaded Run Out ........... 139 7.5 Road Force® Vibration Placed into Perspective ..........139 7.6 StraightTrak® Lateral Force Measurement System........... 140 StraightTrak® Lateral Force Measurement ............140 Theory ........................ 141 8. GLOSSARY ....................145 iv x CONTENTS GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 9: 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 GSP9720JLR. 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.

  • Page 10: Important Safety Instructions

    IMPORTANT SAFETY INSTRUCTIONS Read all instructions before operating the GSP9720JLR. Read and follow the instructions and warnings provided in the service, operation and specification documents of the products with which this GSP9720JLR is used (i.e., automobile manufacturers, tire manufacturers etc.).

  • Page 11: Electrical

    Quick-Thread® shaft rotation. Decal 128-116-2 warns the user not to view the laser light with optical instruments. Decal 128-1117-2 shows the FDA performance standards compliance. Getting Started x 3 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 12 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 Getting Started GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 13: Specific Precautions/Power Source

    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 Getting Started x 5 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 14: Specific Precautions/Hammerhead™ Tdc Laser Indicator (Optional)

    “O” side of the ON/OFF switch. The system requires about twenty two seconds to “boot up.” After the GSP9720JLR performs a self-check, the “Logo” screen will appear indicating the unit is ready for use. 6 x Getting Started GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 15: Equipment Installation And Service

    +32qF to +122qF (0qC to +50qC) 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). Getting Started x 7 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 16: Safety Summary

    These symbols may appear on the equipment. Alternating current. Earth ground terminal. Protective conductor terminal. ON (supply) condition. OFF (supply) condition. Risk of electrical shock. Stand-by switch. Not intended for connection to public telecommunications network. GSP9720JLR Components 8 x Getting Started GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 17: Standard Accessories

    For optional accessories, refer to Wheel Balancer Brochure, Form 3203-T. JLR Wheel Mounting Kit A. 192-152-2 Standard Cone B. 192-156-2 JLR Cone C. 20-1839-1 Kit, Universal Flange Plate For optional accessories, refer to Wheel Balancer Brochure, Form 3203-T. Getting Started x 9 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 18: Operating The Console

    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. 10 x Getting Started GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 19: Using Control Knob

    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. Getting Started x 11 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 20: Primary Balancing Display

    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. 12 x Getting Started GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 21: Introduction To Balancing

    The assembly may then experience side-to-side imbalance while in motion, causing a shimmy condition and objectionable vibration. NON RECOMMENDED FORM OF STATIC BALANCING BALANCE WEIGHT IS NOT IN CENTER OF WHEEL Introduction to Balancing x 13 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 22: Balancing Theory - Couple Imbalance

    (static) and imbalance wobble (couple) will be eliminated. 14 x Introduction to Balancing GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 23: Smartweight Balancing Technology

    SmartWeight balancing. NOTE: SmartWeight balancing performs this check automatically. For detailed information on adjustment and setup of modes of wheel balancing sensitivity see “Road Force® Measurement Procedures,” on page 81. Introduction to Balancing x 15 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 24: Smartweight Balancing Technology Dynamic Weight Planes

    Install the tire/wheel assembly as normal. Rim measurements are not required to determine if the balance forces are exceeded. Lower the hood and spin. 16 x Introduction to Balancing GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 25 Cycle back the same way. NOTE: SmartWeight balancing technology is the default balancing method and is the most recommended way to accurately balance wheel/tire assemblies. Introduction to Balancing x 17 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 26: Smartweight Forces And Limits Feature

    The following example is set at the default of 75%. A 75% residual goal means that Weightsaver® allows 75% of the maximum allowed couple force to remain. This saves more weight, saves time, and saves money. 18 x Introduction to Balancing GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 27: Smartweight Odometer

    This is critical when balancer to vehicle centering errors affects the residual static forces on the vehicle. 2.7 SmartWeight Odometer SmartWeight Odometer displays the accumulated savings on the balance screen. Introduction to Balancing x 19 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 28: Show Savings Summary

    “Set Assumptions” key available in “Service Mode” only. Rolling the selector knob will change from Daily to Weekly to Monthly Yearly and Five Year savings. Select “Print Screen” to print the weight savings displayed. 20 x Introduction to Balancing GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 29 Pressing the selector knob and then rolling it will change from percentage payback to total monetary value. Select “Print Screen” to print the weight savings displayed. Select “Exit” softkey when done. Introduction to Balancing x 21 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 30 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 113. 22 x Introduction to Balancing GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 31: Balancing Procedures

    Position wheel lift carriage at the end of the wheel lift rail. Press the lift control handle “down” until the trolley carriage is at its lowest level. Roll the wheel assembly onto the wheel lift carriage. Balancing Procedures x 23 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 32: Lowering The Wheel Assembly

    Starting with the wheel lift carriage parked under the wheel assembly; raise the lift control handle “up” to move the lifting assembly to the wheel assembly. Slide the carriage with wheel assembly to the end of the wheel lift rail. 24 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 33: Mounting The Wheel On The Balancer Spindle

    Installing the Wheel Using Quick-Thread® Wheel Clamping WARNING: Keep clear of clamping components during Quick- Thread shaft rotation. Lift the wheel assembly onto the shaft as normal without threading on the wing nut. Balancing Procedures x 25 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 34: Quick-Thread® Wheel Clamping

    Quick-Thread spindle rotation will stop when the clamping components contact the wheel, or when the foot brake is applied for more than half of a second. 26 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 35: Centeringcheck® Wheel Centering Feature

    CenteringCheck® may be used with either a “bare rim” or a “rim with tire assembly.” On-screen prompts lead you through the procedure as follows: Select “Perform CenteringCheck” from the menu. Balancing Procedures x 27 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 36 Press “Start” when ready to take readings. Once more, position the valve stem at 12 o’clock, and then press “Enter Valve Stem.” If the rim is centered properly, the following screen will appear briefly. 28 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 37 Check for: Correct mounting cone/adaptor for this wheel design. Wheel defect such as a metal burr interfering with the cone/adaptor. Dirt or debris interfering with the cone/adaptor. Balancing Procedures x 29 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 38: Mounting Error Detection Features

    STANDARD WHEEL WHEEL MOUNTING CONE SPINDLE SHAFT WING NUT CAPTIVATED SPRING PLASTIC INSIDE CLAMPING SURFACE 30 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 39: Using Plastic Wheel Mounting Washer

    LARGE OFFSET WHEEL MOUNTING PLASTIC CONE WASHER SPINDLE SHAFT WING NUT CAPTIVATED PLASTIC SPRING Balancing Procedures x 31 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 40 NOTE: Use only the wing nut supplied with the GSP9720JLR. In some cases, the mounting pad of the wheel may be extremely wide, and the 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 cup.

  • Page 41: Cone/Flange Plate Mounting

    Set the number of lugholes as follows: A three-lug wheel uses three studs. A four-lug wheel uses four studs. A five-lug wheel uses five studs. A six-lug wheel uses three studs. Balancing Procedures x 33 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 42: Expandable Collet Mounting

    The pressure ring should be used to prevent the wing nut from directly contacting an adaptor or a cone. It will act as a bearing to enable higher clamping forces. 34 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 43: Hood Autostart Feature

    Refer to “Setting Up the Hood Autostart Feature,” page 113. 3.6 Loose Hub Detect Feature When the GSP9720JLR senses that the wheel is loose, it will automatically stop the spin. You should tighten the wing nut before proceeding. Balancing Procedures x 35 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 44: The Logo Screen

    3.7 The Logo Screen The GSP9720JLR logo screen offers two options for balancing. The “Standard Balance” softkey will start a balance procedure without specific JLR procedures. Use this when balancing a wheel/tire assembly that is not a JLR OEM assembly.

  • Page 45: Tsb Screen

    “Recall by VIN #”. Scan the VIN barcode on the vehicle with the optional handheld scanner. After the VIN has been entered, press “OK”. 3.9 TSB Screen Balancing Procedures x 37 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 46: Vehicle Specifications Screen

    To update specifications, the following items are required: A PC with an internet connection User Name Password USB flash drive To retrieve User Name and password, select “Identify Software” from the logo screen. 38 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 47 To access and remove the flash drive, first remove the plug from the back panel of the LCD support. Pull the flash drive from the USB port within the LCD support. Balancing Procedures x 39 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 48 Click the file link to download. Choose "Save" or "Save to Disk", depending on the web browser being used. Browse to the location of your storage device (USB thumb drive). Click "Save." 40 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 49 If you wish to exit the uploading process at any time, a “Cancel” key is available on the second row of softkeys. Select the appropriate spec file (matching the name of the file you downloaded from the Web) and press “OK”. Balancing Procedures x 41 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 50 If a spec file is incompatible with your currently installed software cartridge, a note will appear beside the file name. This indicates that you need to contact your Hunter Service Representative to order a new software cartridge. The balancer will prompt the user to confirm the upload. Press “OK” to continue. The balancer may take a few seconds to complete the uploading process.

  • Page 51: Motor Drive/Servo-Stop

    Using the Spindle-Lok® to stop a spinning wheel may result in personal injury or damage to the balancer. 3.13 Balance Primary Screen The “Balance” primary screen has a choice of two related views: Set Dimensions Apply Weights Balancing Procedures x 43 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 52: Spin Tracker Feature

    The control knob can be used to manually enter the rim dimensions. 3.14 Spin Tracker Feature Methods of Saving Spin Data The GSP9720JLR tracks the wheel assembly currently being balanced. This is accomplished by two methods; STANDARD BALANCE - DEFAULT - The balancer assumes that the technician is working “around the vehicle”...

  • Page 53: Storing Measurements

    Select “Store Measurements”. The measurements are stored for the front left assembly. Select “Exit” to continue. Balance assembly and continue to the next assembly. The “Store Measurements” screen will automatically progress to the next assembly in a clockwise direction. Balancing Procedures x 45 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 54: Print Summary

    Select “Print” to send before and after balance summary results to the printer. 3.15 Balance Modes Select the correct balance mode for each application using the control knob. Refer to “Using the Control Knob,” page 11. 46 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 55: Smartweight® Balancing Technology

    Dynamic will always display two weight planes. Dynamic balancing provides a more complete balance than static balancing. Dynamic balancing should be selected whenever possible to minimize vehicle vibration. Refer to “Balancing Theory-Couple Imbalance,” page 14. Balancing Procedures x 47 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 56: Static Balancing - Traditional Balancing Mode

    Two reminder pop-up text messages appear on the balance screen dialog box when selecting static mode. The first screen gives the warning: “Avoid STATIC single-plane balancing.” The second screen suggests: “DYNAMIC dual-plane balancing recommended (even for hidden weights).” 48 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 57: Balancing Procedures For Specific Weight Types And Placement

    ADHESIVE WEIGHTS BALANCE should be selected when clip-on weights cannot be used on either rim flange. Balancing Procedures x 49 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 58: Auto Mode Balancing Procedure

    Select either grams or ounces by rotating the control knob and highlighting either “g” or “oz.” Select “DYNAMIC” by rotating the control knob to highlight “ .” Refer to “Dynamic Balancing Selection,” page 44. 50 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 59 Refer to “3.23 Optional HammerHead™ TDC Laser Adhesive Weight Locator,” on page 76. ® If necessary, use the left “ ” to split the weight. Refer to “Split Weight Feature,” page 66. Balancing Procedures x 51 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 60: Mixed Weights Balancing Procedure Using A Combination Of Clip-On & Adhesive Weights

    Select either grams or ounces by rotating the control knob and highlighting either “g” or “oz.” Select “DYNAMIC” by rotating the control knob to highlight “ ,” if SmartWeight is enabled. Refer to “Dynamic Balancing,” page 47. 52 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 61 ® If necessary, use the left to split the weight. Refer to “Split Weight Feature,” page 82. Servo-Activated Laser automatically locates BDC to aid in fast adhesive weight positioning. Balancing Procedures x 53 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 62 If necessary, use the right “ ” to split the weight. Refer to “Split Weight® Feature,” page 82. Left and right weight plane displays should show “OK” after check spin. MIXED WEIGHTS balancing procedure is complete. 54 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 63: Adhesive Weights Balancing Procedure Using Adhesive Weights

    Press the green “START” button if “Hood Autostart” is disabled. After wheel comes to a complete stop, raise the safety hood. Servo-Activated Laser automatically locates BDC to aid in fast adhesive weight positioning. Balancing Procedures x 55 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 64 If necessary, use the right to split the weight. Refer to “Split Weight Feature,” page 82. Left and right weight plane displays should show “OK” after check spin. ADHESIVE WEIGHTS balancing procedure is complete. 56 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 65: Patch Balance® Procedure

    Phillips head screws and gently pulling the bumper away from the arm. PHILLIPS HEAD SCREW BUMPER PHILLIPS HEAD PHILLIPS HEAD SCREW SCREW Measure and enter the weight plane distances as follows: Balancing Procedures x 57 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 66 Finish the patch balancing procedure by returning to the appropriate balance procedure for the type of wheel being balanced. Verify balance condition by spinning again, and attach weights as necessary to correct for residual imbalance. PATCH balancing procedure is complete. 58 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 67: Automatic Dataset® Arms Operation

    Refer to “3.23 Optional HammerHead™ TDC Laser Adhesive Weight Locator,” on page 76. While on the “Set Dimensions” view of the “Balance” primary screen, the control knob can be used to enter rim dimensions manually. Balancing Procedures x 59 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 68: Measuring Dimensions For Standard Clip-On Weight Balancing

    Hunter Engineering Company recommends using the inner and outer Dataset® arms to enter dimensions. Refer to “Using the Auto Dataset® Arms,” page 59. Measuring Dimensions for Standard Clip-on Weight Balancing To measure rim dimensions for clip-on weights, activate the Standard balancing mode.

  • Page 69: Measuring Dimensions For Adhesive Weights Balancing

    Dataset® arm. Pull the inner Dataset® arm out from the base until the arm and the weight location are overlapping. Balancing Procedures x 61 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 70 NOTE: Lifting the inner Dataset® arm will trigger the balancer for dimension input. Do NOT step on the foot pedal or new dimensions will be entered. 62 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 71: Rim Runout Measurements

    To measure rim runout with the tire on the rim, remove all clip-on weights from the rim and place the inner and outer Dataset® arm on the rim as shown below: Balancing Procedures x 63 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 72 Take care when placing hands to measure rim runout that no part of your hands or body interfere with parts in motion. NOTE: Do not grasp the Dataset® arms. Use fingertip pressure only. 64 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 73 To measure bare rim runout, remove the tire from the rim. Mount the bare rim on the GSP9720JLR. Select “Measure Rim Runout” from the “Balance” primary screen. Select “Measure Bare Rim.” Loosen the outer Dataset® arm locking screw by turning it counter-clockwise.

  • Page 74: Blinding And Rounding

    Split Weight® Operation Each time is pressed, the two weights are increased to the next largest weight size and are placed (fanned out) further down the rim, as shown below. 66 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 75: Correcting Large Imbalances

    When in either mixed weight or adhesive weight modes, (dynamic or static), correction weights can be hidden behind the spokes of a wheel. The example below is in the mixed weight mode. Balancing Procedures x 67 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 76: Hiding Adhesive Weight Behind Spoke

    Rotate the wheel to position the Dataset® arm behind an adjacent spoke (nearest spoke in either direction). Enter the data by pressing the foot pedal. Return the inner Dataset® arm to the home position. Close safety hood. 68 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 77: Re-Entering Similar Wheel After Split Spoke® Is Enabled

    Once Split Spoke® mode is enabled, use the “Set New Spoke Location” key to input the spoke orientation of the other three rims from a set to avoid re-measuring the weight plane dimensions each time. This can be performed with or without the laser. Balancing Procedures x 69 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 78: Placing Hidden Weight Inside Of Hollow Spokes

    Measure the distance from the left weight plane to the desired right weight plane, using a tape measure. This distance must be in millimeters (convert inches to millimeters by multiplying by 25.4). 70 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 79 Press the green “START” button with the safety hood in the RAISED position and the GSP9720JLR will servo to the location for the second spoke. Attach the appropriate weight as displayed on the console. All weight plane displays should show “OK” after check spin. Balancing Procedures x 71 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 80: Rimscan™ Wheel Profile Scanner

    For mixed weights, first move the inner Dataset arm in the UPWARD position to the clip-on weight location and tap foot pedal to measure the distance and diameter dimensions prior to performing RimScan™. 72 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 81 While it is not necessary to “draw” slowly with ® the Dataset arm, it will produce a more accurate representation of the rim profile especially with rims having multiple steps or taper. Balancing Procedures x 73 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 82 Select “Find Best Location” to let the balancer decide what is the optimum corrective weight location. If by chance the user-selected weight positions are unacceptable, “Find Best Location” will return the weights to the optimum positions. 74 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 83: Real-Time Predictions With Rimscan And Smartweight

    During the mixed weights and adhesive weights balancing procedures, the BDC laser locator automatically displays a vivid line at bottom dead center after a wheel has been spun. The laser turns off when the wheel is spun again. Balancing Procedures x 75 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 84: Optional Hammerhead

    TDC to aid in fast clip-on weight positioning. The HammerHead™ TDC Laser System automatically displays a vivid line at top dead center after a wheel has been spun. The laser turns “off” when the wheel is spun again. 76 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 85 Never look directly into the laser. Doing so may cause serious injury. Operation accessible radiation fields: Wavelength 635-660nm Laser Power for Classification <1mW via 7mm aperture Beam Diameter <5mm at aperture Divergence <1.5mrad x <2rad Transverse Beam Mode TEM00 Balancing Procedures x 77 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 86: Specific Precautions / Hammerhead™ Tdc Laser System

    3.24 TPMSpecs Feature NOTE: TPMS specifications can also be found on Hunter Aligners (with WinAlign 11.0) and online at UnderCarInfo.NET (subscription service). The TPMSpecs feature identifies vehicles with tire pressure monitoring systems. It also provides in-depth information regarding the service of TPMS.
  • Page 87 TPMSpecs screen) indicates the requirement is possibly required; refer to the explanation below the images. Scroll down by turning the control knob for detail TPMS information for the vehicle. Balancing Procedures x 79 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 88 80 x Balancing Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 89: Road Force ® Measurement Procedures

    The load roller cannot be enabled in “Bare Rim Spin” mode. When the load roller is disabled, only a balance spin will be performed. This can be useful for a balance check spin after weights have been applied. Road Force® Measurement Procedures x 81 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 90: Inflation Station

    The Inflation Station screen exits automatically when you remove the hose from the valve stem, or if you manually exit via the softkeys. 82 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 91: Forcematching

    “Diagnosis” box will display a message informing you whether Forcematching will be beneficial. The diagnosis and basis for calculating conclusions is always based on the limits chosen by the operator from the Balance Screen and Setup Mode. Road Force® Measurement Procedures x 83 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 92: Forcematch® Procedures

    “START.” Mark the rim with a piece of chalk or a marker at TDC. If desired, mark the rim with the ForceMatch Code. Refer to “Using ForceMatch Codes Feature,” page 86. 84 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 93: Forcematching Using Previous Bare Rim Measurement

    Forcematching Using Previous Bare Rim Measurement If bare rim measurements (refer to “Rim Runout Measurement (Bare Rim),” page 65) have been taken and will be used for Forcematching procedures, it will be necessary Road Force® Measurement Procedures x 85 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 94: Forcematching Using Previous Road Force® Measurement

    A marginal rim or tire can be put into stock and later be matched to a rim/tire with a similar ForceMatch Code for a minimal first harmonic vibration. 86 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 95: Dial Indicator Gauges Feature

    When limits that are not first harmonic are exceeded, the “Show Details” key will be replaced with an “Explain Diagnosis” key which can be selected to view information on exceeded limits for the rim or tire. Refer to “Diagnosis Explanation Screen,” page 102. Road Force® Measurement Procedures x 87 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 96: Encountering Forcematch® Prediction Errors

    Tire inflation pressure must meet vehicle manufacturers specifications. Verify the wheel is centered. Use the approved adaptors for GSP9720JLR. Use approved wing nut provided and tighten with two hands to ensure full clamping force. The tire/wheel assembly must be free of debris.

  • Page 97: Quickmatch® Tire And Wheel Mounting

    To enable Road Force Audit mode, refer to “Road Force Audit Mode” on page 118. NOTE: When Road Force Audit is enabled, there is no longer a selection between QuickMatch and Road Force, since both are technically enabled at that point. Road Force® Measurement Procedures x 89 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 98: Quickmatch® Procedures

    This will allow you to align the rim and hub/shaft assembly back together after mounting the tire on the rim. After spinning with the tire mounted and the load roller enabled, press “Apply Last Rim Data” from “Current QuickMatch 90 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 99: Quickmatch® Using Previous Loaded Runout Measurement

    T.I.R. runout is marginal. If red appears on the span of the gauge, T.I.R. runout has been exceeded. The dial indicator located directly above the tire tread is the loaded runout of the assembly as taken by the load roller. Road Force® Measurement Procedures x 91 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 100: Lateral/Radial Rim High Spot Indicators Feature

    “Current QuickMatch Measurements” screen. Located 180 degrees from the rim matching mark is a green indicator that will appear between the rim lips to identify the rim average 1st harmonic high spot. 92 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 101: Encountering Forcematching® Or Quickmatching® Prediction Errors

    Tire inflation pressure must meet vehicle manufacturers specifications. Verify the wheel is centered. Use the approved adaptors for GSP9720JLR. Use approved wing nut provided and tighten with two hands to ensure full clamping force. Bare rim runout measurements are required if the wheel design does not permit external measurement of the outer bead seat area.

  • Page 102: Tranzsaver

    TranzSaver is superior and offers a high load measurement that also takes into account the tire pressures and the change it will have on the tire when placed on the vehicle. 94 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 103: Straighttrak® Lfm (Lateral Force Measurement)

    Performing a StraightTrak® LFM Procedure: Mount the tire/wheel assembly centered on the shaft of the GSP9720JLR. Use care to make sure the wing nut is well tightened. Choose the appropriate balancing procedure for the particular type of rim construction.
  • Page 104 Press “Tire Tags” softkey to number the second tire/wheel assembly. The screen will default to tag 2. Press “OK” to accept tag 2. Refer to “Changing Tag Numbers,” page 99. 96 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 105 Refer to “Vehicle Plan View,” page 98. On the Vehicle Plan View screen, various choices of tire placement may be chosen to optimize the vehicle for least pull and/or least vibration. Road Force® Measurement Procedures x 97 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 106: Disabling Straighttrak

    Each press of will toggle the pull to the opposite direction, however it will remain in that direction until is pressed again. 98 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 107: Road Force® Arrows

    This fifth wheel/tire assembly could now be tagged as 2, eliminating the original measurement for tag 2. Road Force® Measurement Procedures x 99 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 108: Show Least Pull

    The first screen shown will be the configuration that will yield the least amount of net pull. Each press of the “Show Alternate Placements” softkey will show the configuration that will provide the next least amount of net pull. 100 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 109: Show Details

    The printout can be used to explain the effects of lateral force and the steps taken to reduce their adverse effect to the customer. Road Force® Measurement Procedures x 101 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 110: Inflation Pressure

    Print to USB The GSP9720JLR has the ability to print data to a USB storage device. “USB Flash Drive” is available as a Hunter Approved printer in setup. Selecting this printer enables storing of printouts in .PDF format to a USB drive that contains the file “printer.txt”...

  • Page 111: Details Screen

    A graphic depiction and description of the measurement may be viewed by selecting “Explain Measurements” from the “Details” popup screen. As each measurement item is highlighted, the graphics will change to display the corresponding picture and description. Road Force® Measurement Procedures x 103 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 112 From the “Details” popup screen, “Show Runout Plots” may be selected. From this screen, a graphic depiction of the measured data, multiple harmonics, road force, and runout may be viewed. Refer to “Harmonics & T.I.R. Data/Plots,” page 106. 104 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 113: Printouts

    “Show Details” screen through fourth harmonics. NOTE: Printed summaries of the savings due to SmartWeight are available. Refer to section “2.7 SmartWeight Odometer” on page 19. Road Force® Measurement Procedures x 105 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 114: Harmonics & T.i.r. Data/Plots

    The initial screen defaults to the first harmonic plot of the load roller data for the assembly. The assembly lines are color coded to represent a specific value as follows: ASSEMBLY ASSEMBLY T.I.R. HARMONIC (WHITE) (BROWN) 106 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 115: Tire Data Plots Screen

    For instance, the plot below shows the four revolutions for the first harmonic for assembly loaded road force data. 4 REVOLUTIONS OF ASSEMBLY DATA SHOWN Selecting “Show One Revolution” will return the data to the single revolution plot. Road Force® Measurement Procedures x 107 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 116: Rim Data Plots Screen

    NOTE: The statistics screen does not tally balance results. 108 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 117 “Clear Data” can also be selected (key is only available in Service Mode) to erase the tabulated statistics data. If statistics are displayed in metric units, then the displayed ranges will be converted from inches to millimeters and from pounds to kilograms. Road Force® Measurement Procedures x 109 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 118 110 x Road Force® Measurement Procedures GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 119: Equipment Information

    Insert to program cartridge into the cartridge jack located on the side of the board within the support assembly. Verify that program cartridge is fully seated. SECURITY KEY PROGRAM INSTALLED CARTRIDGE INSTALLED Equipment Information x 111 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 120: Balancer Set Up

    “n” or “p”, the equipment components for each set up procedure are shown in yellow on the illustrated GSP9720JLR. Change set up features by selecting “Set Up Selected Item.” The gray box at the top of the item set up menu displays the current setting for each feature.

  • Page 121: Display Language

    Selects English or Metric units for displaying runout measurements. Road Force Units Selects the desired units for road force measurement to be displayed on the screen and in printouts. Select units in pounds, Newtons, or kilograms. Equipment Information x 113 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 122: Service Mode Setup And Features

    5.4 Service Mode Setup and Features NOTE: Service Mode should only be used by authorized users or Hunter Engineering Company authorized service personnel. Some options in Service Mode may not be available. Options in Service Mode are dependent on the specific authorization key installed.
  • Page 123 The lowest programmable radial 1st harmonic setting is 7 lbs, and the highest programmable radial 1st harmonic setting is 40 lbs. P, P/SUV, and LT may be selected by using the control knob on the GSP9720JLR. Equipment Information x 115...

  • Page 124: Balance Limits

    0.05 ounces, and 0.25 ounces. Setting Up the Gram Round Amount Selects the amount to which gram weights are rounded. Gram Round Amount options include 1 gram, and 5 grams. 116 x Equipment Information GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 125: Non-Smartweight Options

    The Residual Goal has a default of 75% of the maximum allowed shimmy force to maximize weight savings. Prompt for Wheel Assembly ID Enables or disables prompting of the user to enter the current assembly before saving. Equipment Information x 117 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 126: Spindle Type

    Road Force Audit Mode Enables Road Force Audit. While in service mode, select Quickmatch. Select the last option which is “Enabled, with Road Force”. Save setup and return to balance screen. 118 x Equipment Information GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 127: Calibration And Maintenance

    Quick Cal™ Check does not check the calibration of the Dataset® arms, or load roller. The weight used for calibrating the balancer and the inner Dataset® arm is stored on the back of the monitor support. Calibration and Maintenance x 119 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 128: Calibration Menu

    Dataset® arm and load roller calibrations require the optional calibration tool, 221-672-1. Balancers with StraightTrak® require Kit 20-1693-1 (refer to Form 4886T, Calibration Instructions for StraightTrak® Kit 20-1693-1). 120 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 129 Verify that the inner arm is in the “home” position at the top of the weight tray and is not moving. Tap the foot pedal once or press “Enter Cal Step.” Calibration and Maintenance x 121 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 130 To verify that the tool is parallel to the floor, measure from both ends of the calibration tool to the floor. The measurement will be the same at both ends when the tool is parallel to the floor. 122 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 131 Place the inner Dataset® arm at upward position “2.” Tap the foot pedal once or press “Enter Cal Step.” Place the inner Dataset® arm at upward position “3.” Tap the foot pedal once or press “Enter Cal Step.” Calibration and Maintenance x 123 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 132 Place the inner Dataset® arm at the position “9.” Tap the foot pedal once or press “Enter Cal Step.” Inner Dataset® arm calibration is complete. Outer Dataset® Arm (Calibration Tool, 221-672-1, Required) Select “Outer Dataset” from the “Calibration Procedures” primary screen. Select “Begin Procedure.” 124 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 133 NOTE: The calibration tool should be in full contact with the hub face, but will allow a gap to exist between the tool and the hub face. Calibration and Maintenance x 125 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 134 Rotate the outer arm ball back to the upward position. Outer Dataset® arm calibration is complete. Load Roller (Calibration Tool, 221-672-1, Required) Select “Load Roller” from the “Calibration Procedures” primary screen. Select “Begin Procedure.” 126 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 135: Calibration Menu (Service Mode Enabled)

    PRIOR to reconnecting the air supply. Load roller calibration is complete. Calibration Menu (Service Mode Enabled) Inflation Station Select “Inflation Station” from the “Calibration Procedures” primary screen. Select “Begin Procedure.” Calibration and Maintenance x 127 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 136 If the optional reference gauge is not available, select “Skip Cal Step.” Attach the inflation station hose to a wheel assembly with a verified inflation of at least 15 psi. Select “Enter Cal Step” to proceed with test. 128 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 137: Diagnostic Procedures

    “Diagnostics” from the “Logo” screen. As each procedure is highlighted by selecting “n” or “p,” the equipment components for each diagnostic procedure are shown in yellow on the illustrated GSP9720JLR. Most of the diagnostic data is for the sole purpose of conveying information to the Hunter Service Representative.

  • Page 138: Spindle Encoder

    Place, store, and operate the balancer only in a dry, sheltered location. 130 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 139: Maintenance

    Doing so may cause serious injury. Do not intentionally use a reflective device to enhance or re- direct the laser. Do not operate the laser if the cover or seal is damaged. Calibration and Maintenance x 131 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 140: Mounting Cone Maintenance

    Do not use cones in any way that is not described in this operation manual. This could cause damage to the mounting cone and not allow for proper mounting of the wheel. 132 x Calibration and Maintenance GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 141: Theory Of Operation

    Combination of Some or All Factors *Factors not detected by the GSP9720JLR Series Road Force Measurement System. A vibration that occurs one time for every revolution is defined as a first harmonic vibration: Theory of Operation x 133 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 142 Multiple harmonic vibrations may also occur. For instance, the third order vibration causes a three times per revolution vibration: Multiple harmonic vibrations may occur at any harmonic factor, dependant only upon the number of vibration components in each revolution. 134 x Theory of Operation GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 143: Road Force® And Runout Measurement

    NOTE: It is important that the air pressure of the tire is set to specifications prior to the Road Force® Measurement. Incorrect tire pressure will affect the results. Theory of Operation x 135 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 144: Radial Force Variation (Rfv)

    Unlike balancing, there is often a small amount of RFV remaining in the tire/wheel assembly after ForceMatching and this is generally acceptable. 136 x Theory of Operation GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 145: What Is Road Force Measurement

    Road Force since the stiffness effect of the tire are not taken into consideration. OUT-OF-ROUND TIRE OUT-OF-ROUND Runout (Eccentricity) is the Only Part of the Vibration Measurement Needed Theory of Operation x 137 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 146 Locating non-balance related vibration issues might very well diminish to a “game of chance”. As a result the best possible ride quality is diminished and repair time will increase in frequency. 138 x Theory of Operation GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 147: Radial Force Variation Vs. Unloaded Run Out

    Most tire service professionals and factory service manuals agree that residual static imbalance should not exceed 0.30 oz. on average size wheels and 0.60 oz. on larger light duty truck wheels. Theory of Operation x 139 GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 148: Straighttrak® Lateral Force Measurement System

    When using StraightTrak® LFM, the basic machine cycle is the same as it has been for the standard GSP9720JLR, except that several additional tire revolutions have been added to the end of the cycle so that lateral force measurements can be taken.

  • Page 149: Theory

    The automotive service industry has long been aware of tire-related vehicle lateral force conditions; however, no quantifiable method for diagnosis has existed for the service shop. With the StraightTrak® Lateral Force Measurement (LFM) feature, the Hunter GSP9720JLR Series Road Force Measurement System can measure the primary...
  • Page 150 In most cases, a tire’s pull value is of little concern when placed on the rear axle and does not affect the straight-ahead stability of the vehicle. 142 x Theory of Operation GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 151 Tire pressure measurement is prompted with a pop-up screen before every load roller measurement. Theory of Operation x 143 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 152 144 x Theory of Operation GSP9720JLR Wheel Balancer Operation Instructions...

  • Page 153: Glossary

    The diameter of an imaginary circle drawn through the center of each lughole, and virtually always on the same centerline as the hub bore of the wheel. CenteringCheck Hunter feature that ensures the wheel is properly centered when mounted on the balancer. Couple Balance A procedure that corrects the imbalance in radial movement.
  • Page 154 Used to reduce the magnitude of a given vibration. Rubber is commonly used to isolate and dampen vibrations. ® Dataset The inner and outer electronic arms on the GSP9720JLR. By positioning the Dataset arms and entering data using the foot pedal, rim dimensions can be recorded for balancing. Dynamic Balance A procedure that balances the wheel assembly by applying correction weights in two planes so that up and down imbalance and side-to-side imbalance are eliminated.
  • Page 155 The accessory used to prevent the wing nut from contacting the wheel when on the balancer shaft. QuickMatch® Tire and wheel mounting and balancing method that matches the loaded runout of the tire in contrast to the runout of the rim to achieve vibration reduction. Glossary x 147 GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 156 SmartWeight measures the forces placed on a wheel and balances in an effort to reduce those forces, thus saving weight, time, and money. Source Component A component causing another object to vibrate, such as a tire/wheel assembly. 148 x Glossary GSP9720JLR Wheel Balancer Operation Instructions...
  • Page 157 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 x 149 GSP9720JLR Wheel Balancer Operation Instructions...

This manual is also suitable for:

Gsp9700 series

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