® 775/875 Wheel Balancer See Balancing Your First Tire on page 1. Installation Operating Safety Maintenance Instructions Instructions Instructions Instructions READ these instructions before placing unit in service KEEP these and other materials delivered with the unit in a binder near the machine for ease of reference by supervisors and operators. 1601 J. P. Hennessy Drive, LaVergne, TN USA 37086-3565 615/641-7533 800/688-6359 www.ammcoats.com HENNESSY INDUSTRIES INC.
ii • Important: Always read and follow the instructions.
Table of Contents Important Safety Instructions . . . . . . . . .iv - vi Owner’s Responsibility . . . . . . . . . . . . . . . . . . . . . .v Operator Protective Equipment . . . . . . . . . . . . . . . .v Definitions of Hazard Levels . . . . . . . . . . . . . . . . . .v Safety Notices and Decals . . . . . . . . . . . . . . . . . . .vi Standard Safety Devices . . . . . . . . . . . . . . . . . . . . .vi Balancing Your First Tire . . . . . . . . . . . . . . . .1 Principle Operating Parts . . . . . . . . . . .
IMPORTANT SAFETY INSTRUCTIONS READ ALL INSTRUCTIONS 1. Eye and face protection recommendations: “Protective eye and face equipment is required to be used where there is a reasonable probability of injury that can be prevented by the use of such equipment.” O.S.H.A. 1910.133(a) Protective goggles, safety glasses, or a face shield must be provided by the owner and worn by the operator of the equipment. Care should be taken to see that all eye and face safety precautions are followed by the operator.
Owner’s Responsibility Definitions of Hazard Levels To maintain machine and user safety, the responsibility of the owner is to read and follow these instructions: Identify the hazard levels used in this manual with the following definitions and signal words: • Follow all installation instructions. • Make sure installation conforms to all applicable Local, State, and Federal Codes, Rules, and Regulations; such as State and Federal OSHA Regulations and Electrical Codes.
Safety Notices and Decals WARNING Failure to follow danger, warning, and caution instructions may lead to serious personal injury or death to operator or bystander or damage to property. Do not operate this machine until you read and understand all the dangers, warnings and cautions in this manual. For additional copies of either, or further information, contact: Hennessy Industries, Inc. 1601 J.P. Hennessy Drive LaVergne, TN 37086-3565 (615) 641-7533 or (800) 688-6359 www.ammcoats.
Balancing Your First Tire 1. Turn the machine OFF then ON (resets machine). Note: The machine wakes up using standard clip-on wheel weight locations (c1 & c2) and wheel dimensions. 2. Mount a tire/wheel on the balancer that will use standard clip-on wheel weights. Use the most appropriate mounting method. 3. Always remove any weights already attached to the wheel. 4. Enter A & D wheel dimensions using offset arm.
Know Your Unit Principle Operating Parts Compare this illustration with the unit before placing it into service. Maximum performance and safety will be obtained only when all persons using the unit are fully trained in its parts and operation. Each user should learn the function and location, of all controls. Prevent accidents and injuries by ensuring the unit is properly installed, operated and maintained.
Note: Throughout this manual wheel weights are referred to as Clip-on or Tape-A-Weight™. Figure 3 shows an example of each weight. Power Switch The ON/OFF switch location is on the side of the balancer; below the weight tray. Model 775 Clip-on Weight Tape-A-Weight™ Corrective Weight Examples: For Best Results, use BADA Brand Wheel Weights. ON/OFF Power Switch ® Model 875 ON/OFF Power Switch On/Off Switch Important: Always read and follow the instructions.
Operating the Balancer Standard Back Cone Mounting Wheel Mounting Select the most appropriate mounting method for the wheel you are balancing. Using the proper method ensures secure mounting and safe balancer operation, and prevents damage to the wheel. On most wheels, the inner side of the wheel hub usually has the most uniform surface for wheel balancing. Always center the wheel by the most uniform shaped side of the hub to achieve the most accurate balance.
Standard Front Cone Mounting A wheel should be centered by the outer side of the hub only when the inner surface will not provide an accurate surface to center on. Rim Cone Hub Nut Front Cone Mounting 1. Select the cone that best fits the center hole in the wheel. 2. Lift the wheel onto the shaft and slide it back against the shaft faceplate. 3. Slide the cone onto the shaft and into the center of the wheel. You will need to lift the tire to seat the cone in the center hole. 4.
Control Panel And Display 775 Control Panel 1 2 3 18 5 6 10a 8 9 10 11 12 4 14 15 13 17 16 1-2 Digital readouts, AMOUNT OF UNBALANCE, inside/outside 3-4 Digital readouts, POSITION OF UNBALANCE, inside/outside 5 Push button, FUNCTIONS MENU 6 Menu selection confirmation push button 8 Push button, SPLIT (unbalance resolution) 9 Clip Mode selection button 10/10a Correction mode selection push buttons 11 12 13 14 15 16 17 18 CORRECTION MODE display push button Push button, unbalance reading <
Operation Functions Menu See optimization unbalance section diameter inch/mm CONFIRM inch/mm width CONFIRM hood start CONFIRM approx. 0.1 - 0.
875 - Entering Wheel Dimensions For clip-on weights, use gauge in the top position A. 875 -Sprung Counterweights c1-c2/STATIC/t1t3/c1-t3 Pos A Pull out the gauge as far as the inner edge of the rim. Hold it in this position until a “beep” is heard. Pos B For adhesive weights, use the gauge as preferred in top position A or bottom position B. Note: Always use the round part of the striker plate resting on the rim. Indication of dimensions acquired Return the gauge to rest position.
875 - t1-t2 and c1-t2 Rims FI FE 875 - Exact Positioning Of The Adhesive Weight By Means Of The Gauge With Clips In normal STATIC/t1-t2 and c1-t2 correction mode and with an inside clip-on weight, approximations in the application of the counterweights can be cancelled by operating as follows: • Press the button Slide out the gauge on the LH side, at the point where a weight is to be fitted. Wait for the “beep”. Slide it out further towards the RH side and wait for a second “beep”.
775 - Manual Presetting Of Wheel Dimensions 775 - t1-t2 Wheel d dt1 Standard Wheels c1-c2/STATIC/t1-t3/c1-t3 dt2 W At1 At2 A - Measure the dimensions as shown in the following diagram. D Presetting: W - Preset distance “A” for the inside of the wheel from the machine. nominal Hold down 3 seconds - Set the rated width, which is generally indicated on the rim, or measure width “W” using the calipers. Note: dt1 = d set + 1" when dt2 is not set, dt2 = d + 2" is automatic.
Result of Measurement 775 - c1-t2 Wheel dc1 Correction of outer side Correction of inner side dt2 Ac1 At2 - Measure the dimensions as shown in the following diagram Presetting: After performing a balancing spin, the amounts of unbalance are shown on the digital readouts. Digital readouts with LED’s 3 - 4 lit up indicate the correct angular wheel position to mount the counterweights (12 o’clock position).
Behind Spoke (Hidden Weight) The SPLIT function is used to position the adhesive weights behind the wheel spokes so that they are not visible. Input the wheel dimensions and do a spin. Start the SPLIT function as follows: Note: If error 24 is displayed, repeat the SPLIT function ensuring that the minimum distance between the spokes is greater than 18 degrees. If error 25 is displayed,repeat the split function ensuring that the maximum distance between the spokes is smaller than 120 degrees.
Match Mount - This function serves to reduce the amount of weight to be added in order to balance the wheel. - It is suitable for static unbalance exceeding 1.5 oz (30g). - Mark the two positions of the rim and tire, and turn the rim on the tire until the positions correspond in order to obtain the optimization on the display. Possible Tire Position = Rim Position - It improves the residual eccentricity of the tire.
Correction Modes To check the type of correction selected, hold the but- From the measurement screen, press or button to select the type required. If a spin has already been performed, the processor automatically recalculates, for each change of mode, the amounts of unbalance according to the new calculation. ton , while on the matrix display the rim symbol appears with the correction weights flashing in the right application position.
875 - Manual Dimension Presetting (Use only in particular cases or for test) 875- c1-c2/STATIC/t1-t3/c1-t3 Wheel Rims (use for setting dimensions in AUTO CALIBRATION) - Setting: W - Preset using indicated on the tire the nominal diameter “D” - Press the button for more than 2 seconds A - Preset using distance “A” for the inside of the wheel from the machine (measure from the first notch (1) to the reading point). D Press Note: This setting is also valid for the correction modes STATIC/t1-t3/c1-t3.
875 - t1-t2 Rims - Setting: 875 - c1-t2 Rims - Setting: dt1 dc1 dt2 dt2 At1 At2 Ac1 At2 To go to these functions: To go to these functions: - press one of the two buttons for more than 2 seconds (measure from the first notch) - Hold the button down for more than 2 seconds (measure from the first notch) - press one of the two buttons for more than 2 seconds (measure from the first notch) - press one of the two buttons for more than 2 seconds (measure from the first notch) - Hold the button down f
Self-Calibration For machine self-calibration proceed as follows: - Fit a wheel with steel rim of average dimensions on the shaft. Example 6" x 14" (± 1") - Preset the exact dimensions of the wheel mounted. Display Saver A display saver function can be enabled which allows temporarily replacing the information on the display with moving symbols.
Maintenance Instructions Diagnostic Procedures The balancer requires only minor maintenance to keep the unit operating properly. 1. Keep the display clean and clear. Use a damp cloth. Do not use cleaners or solvents which leave oily or filmy residues behind. After Balance Vibration Problems If vibration is still present after balancing the wheels and driving the vehicle on smooth pavement, remove the wheels and recheck the balance. If a wheel is out of balance the cause maybe: 2.
Installation Instructions Features A factory trained COATS® Service Technician must perform the install, setup, and initial test procedures on your wheel balancer. Do not attempt to install and setup the unit yourself. Accurate and reliable operation of your unit depends on proper installation. Please contact COATS® directly at 1-800-688-9240 for the Certified Service Partner nearest you.
Floor and Space Requirements Model 875 The balancer must be located on a flat floor of solid construction, preferably concrete. The balancer must sit solidly on its three feet. If the balancer is not level, does not sit solidly on its three feet, or is placed on an unstable floor, the balancer will not function properly and may produce inaccurate balance readings. Do not operate the balancer while it is on the pallet.
Unpacking the Unit 1. Remove the shipping carton from the pallet. 2. Remove all loose parts and accessories packed around the unit. Remove Balancer from Pallet 3. Remove the shipping bolts that hold the balancer to the pallet. CAUTION Do not use the control panel, control panel base, accessory storage, faceplate, hood or shaft to lift the balancer. CAUTION 7. Raise the hood. 8. Install hood spring. This attaches to the cam studs on the hood bar and mounting bracket. 9. Lower the hood. 10.
85008882 02 03/08 © Copyright 2007 Hennessy Industries and COATS All Rights Reserved Printed in USA
