1601 J. P. Hennessy Drive, LaVergne, TN USA 37086-3565 615/641-7533 800/688-6359 Manual Part No.: 8111812 08
HENNESSY INDUSTRIES INC. Manufacturer of AMMCO
®
, COATS®and BADA®Automotive Service Equipment and Tools. Revision: 06/08
850 Solid State
WHEEL BALANCER
®
Installation Instructions
Operating Instructions
Safety Instructions
Maintenance 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.
ii • COATS 850SS Wheel Balancer
Direct Drive
COATS 850SS Wheel Balancer • iii
Table of Contents
Operator Protective Equipment . . . . . . . . .iv
Owner’s Responsibility . . . . . . . . . . . . . . . . .v
Definitions of Hazard Levels . . . . . . . . . . . . .v
Important Safety Instructions . . . . . . . . . . .vi
Before You Begin
Receiving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Standard Accessories . . . . . . . . . . . . . . . . . . . . . .1
Optional Accessories . . . . . . . . . . . . . . . . . . . . . . .1
Electrical Requirements . . . . . . . . . . . . . . . . . . . . .1
Assembly and Setup
Floor and Space Requirements . . . . . . . . . . . . . . .2
Unpack and Setup the Unit . . . . . . . . . . . . . . . . .2
Connecting Power . . . . . . . . . . . . . . . . . . . . . . . . .4
Initial Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Mounting Wheels
Back Cone Mounting . . . . . . . . . . . . . . . . . . . . . . .5
Front Cone Mounting . . . . . . . . . . . . . . . . . . . . . .5
Protruding Outer Hub . . . . . . . . . . . . . . . . . . . . . .5
Determining Wheel Measurements
Distance - A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Wheel Width - W . . . . . . . . . . . . . . . . . . . . . . . . . .6
Wheel Diameter - D . . . . . . . . . . . . . . . . . . . . . . .6
Measuring and Entering A, W, & D . . . . . . . . . . . .6
Determining Balancing Mode
Dynamic Balancing . . . . . . . . . . . . . . . . . . . . . . . .7
Static Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Alloy Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Balancing a Wheel
Balance Checking . . . . . . . . . . . . . . . . . . . . . . . . .8
After Balancing Vibration Checklist . . . . . . . . . . . .9
Extended Functional Capability . . . . . . . . . . . . . . .9
Maintenance and Calibration
Preventative Maintenance . . . . . . . . . . . . . . . . . .10
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Error Messages and Function Codes
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . .11
Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . .11
Contents
iv • COATS 850SS Wheel Balancer
Safety
Operator Protective
Equipment
Personal protective equipment helps make tire servicing safer. However, equipment does not take the
place of safe operating practices. Always wear durable
work clothing during tire service activity. Loose fitting
clothing should be avoided. Tight fitting leather gloves
are recommended to protect operator’s hands when
handling worn tires and wheels. Sturdy leather work
shoes with steel toes and oil resistant soles should be
used by tire service personnel to help prevent injury in
typical shop activities. Eye protection is essential during tire service activity. Safety glasses with side
shields, goggles, or face shields are acceptable. Back
belts provide support during lifting activities and are
also helpful in providing operator protection.
Consideration should also be given to the use of hearing protection if tire service activity is performed in an
enclosed area, or if noise levels are high.
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
WARNING
Do it Now
Make sure the instruction and warning decal is clean and clearly visible
to operator.
✓
NOTICE
Read entire manual before assembling,
installing, operating, or servicing this
equipment.
COATS 850SS Wheel Balancer • v
Owner’s Responsibility
To maintain machine and user safety, the responsibility of the owner is to read and follow these instructions:
• 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.
• Carefully check the unit for correct initial function.
• Read and follow the safety instructions. Keep
them readily available for machine operators.
• Make certain all operators are properly trained,
know how to safely and correctly operate the unit,
and are properly supervised.
• Allow unit operation only with all parts in place
and operating safely.
• Carefully inspect the unit on a regular basis and
perform all maintenance as required.
• Service and maintain the unit only with authorized
or approved replacement parts.
• Keep all instructions permanently with the unit
and all decals/labels/notices on the unit clean and
visible.
• Do not override safety features.
Definitions of Hazard
Levels
Identify the hazard levels used in this manual with
the following definitions and signal words:
DANGER
Watch for this symbol:
It Means: Immediate hazards, which will result in
severe personal injury or death.
WARNING
Watch for this symbol:
It Means: Hazards or unsafe practices, which could
result in severe personal injury or death.
CAUTION
Watch for this symbol:
It Means: Hazards or unsafe practices, which may
result in minor personal injury or product or property
damage.
Watch for this symbol! It means BE ALERT! Your
safety, or the safety of others, is involved!
CAUTION
WARNING
DANGER
Safety
vi • COATS 850SS Wheel Balancer
Safety
IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE 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. ALWAYS WEAR SAFETY GLASSES.
Everyday glasses only have impact resistant
lenses, they are not safety glasses.
2. Do not disable hood safety interlock system, or in
any way shortcut safety controls and operations.
3. Be sure that wheels are mounted properly, the
hub nut engages the arbor for not less than four
(4) turns, and the hub nut is firmly tightened
before spinning the wheel.
4. Read and understand this manual before operating. Abuse and misuse will shorten the functional
life.
5. Be sure the balancer is properly connected to the
power supply and electrically grounded.
6. Do not operate equipment with a damaged cord
or if the equipment has been dropped or damaged
– until it has been examined by a qualified serviceman.
7. Do not let cord hang over edge of table, bench, or
counter or come in contact with hot manifolds or
moving fan blades.
8. If an extension cord is necessary, a cord with a
current rating equal to or more than that of the
equipment should be used. Cords rated for less
current than the equipment may overheat. Care
should be taken to arrange the cord so that it will
not be tripped over or pulled.
9. Keep guards and safety features in place and in
working order.
10. Wear proper clothing. Safety toe, non-slip
footwear and protective hair covering to contain
hair is recommended. Do not wear jewelry, loose
clothing, neckties, or gloves when operating the
balancer.
11. Keep work area clean and well lighted. Cluttered
and/or dark areas invite accidents.
12. Avoid dangerous environments. Do not use power
tools or electrical equipment in damp or wet locations, or expose them to rain.
13. Avoid unintentional starting. Be sure the balancer
is turned off before servicing.
14. Disconnect the balancer before servicing.
15. Use only manufacturer’s recommended accessories. Improper accessories may result in personal injury or property damage.
16. Repair or replace any part that is damaged or worn
and that may cause unsafe balancer operation. Do
not operate damaged equipment until it has been
examined by a qualified service technician.
17. Never overload or stand on the balancer.
18. Do not allow untrained persons to operate
machinery.
19. To reduce the risk of fire, do not operate equipment in the vicinity of open containers or flammable liquids (gasoline).
20. Adequate ventilation should be provided when
working on operating internal combustion
engines.
21. Keep hair, loose clothing, fingers, and all parts of
body away from moving parts.
22. Use equipment only as described in this manual.
23. Use only manufacturer’s recommended attachments.
COATS 850SS Wheel Balancer • 1
Before You Begin
Receiving
The shipment should be thoroughly inspected as
soon as it is received. The signed bill of lading is
acknowledgement, by the carrier, of receipt in good
condition of the shipment covered by our invoice.
If any of the goods called for on this bill of lading are
shorted or damaged, do not accept them until the carrier makes a notation of the shorted or damaged goods
on the freight bill. Do this for your own protection.
NOTIFY THE CARRIER AT ONCE if any hidden loss or
damage is discovered after receipt and request him to
make an inspection. If the carrier will not do so, prepare an affidavit to the effect that you have so notified
the carrier (on a certain date) and that he has failed to
comply with your request.
IT IS DIFFICULT TO COLLECT FOR LOSS OR DAMAGE AFTER YOU HAVE GIVEN THE CARRIER A CLEAR
RECEIPT.
File your claim with the carrier promptly. Support your
claim with copies of the bill of lading, freight bill,
invoice, and photographs, if possible.
Although COATS responsibility ceases upon delivery
of the shipment to the carrier, we will gladly assist in
tracing lost shipments. Our willingness to assist in
every possible manner does not make COATS responsible for collection of claims, or replacement of lost or
damaged materials.
Features
• Exclusive Direct Drive System (No Belts or Pulleys)
• Single-Spin Balancing
• Vertical Wheel Mounting
• Hood Safety Interlock Switch
• Graduated Cone Assortment for Back Cone Mounting
• Self Calibrating
• Removable Stub Shaft for Closed Center Wheel
Mounting on Optional Combi-Adapter
• Extended Face Plate Flange for Deeper Wheels
• “No Bolt-Down” Installation
• Adjustable Control Panel
–Scratch and Solvent Resistant
–Large, Bright Digital Displays
–Easy-to-Read Indicators
–Large Keypad for Data Entry
–Easily Repositioned for Best Visibility
–Memory and Program Checks
–Distance and Diameter Entry
–Dynamic, Static, Alloy, & RV Balancing Modes
Specifications
• Cycle time . . . . . . . . . . . . . . . . . . 10 seconds (avg.)
• Outside Tire Diameter. . . . . . . . . . . . . . . . 40" max.
• Wheel Diameter Range . . . . . . . 10 to 24"/1016mm
• Tire Weight . . . . . . . . . . . . . . . . . . 90 pounds max.
• Wheel Diameter Range . . . 10 - 19.5"/254 - 505mm
• Wheel Width Range . . . . . 2.7 to 18.6"/68 - 472mm
• Balancing Increments . . . . . . 1/4 ounce or 5 grams
• Resolution
. . . . . . . . . . . . . . . . . . . . . . +/- 0.01 ounce (weight)
. . . . . . . . . . . . . . . . . . . . +/- 2.8 degrees (position)
• Modified High Torque Motor
. . . . . . . . . . . . . 1 HP, 180 RPM, Forced Air Cooling
• Large Housing for Heat Dissipation (Motor)
• Shipping Weight. . . . . . . . . . . . . . . . . . 437 pounds
Standard Accessories
• Graduated Cone Assortment
• Cone Spring
• Hub Nut
• No-Mar Ring
• Rim Width Calipers
• Wheel Weight Pliers
Optional Accessories
• Combi-Adapter for bolt hole mounting
• Extra Large Truck Cone Kit
• 3, 4, and, 5 Lug Universal Adapters
• Escort/Lynx Adapter
Electrical Requirements
The balancer requires a 110 VAC, 60Hz, single-phase
power supply with 20 amp fuse or circuit breaker.
This single-phase balancer is equipped with an
approved cord and a 3-prong grounding plug to fit a
Hubbell 2320 or Bryant
grounding receptacle (not
included). See figure 1.
A qualified electrician
should install the receptacles in accordance with
state and local codes.
Direct Drive
Figure 1 - Outlet Wiring
Diagram
Installation and Setup
A factory trained COATS®Service Technician must perform the
install, setup, and initial test procedures on your 850 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
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 will produce inaccurate balance readings.
Do not operate the balancer when it is still bolted down or
while it is on the pallet.
Select a location for the balancer that provides a level, solid
floor, and adequate clearance around and above the balancer
(Figure 2). Make sure the location selected has enough room
above and behind the unit so the hood can be raised completely.
The location must also provide working room for mounting and
removing wheels.
Unpack and Setup the Unit
1. Remove the carton from the pallet.
2. Remove the shipping bolts in the three support feet.
3. Cut the strap holding the hood in shipping position.
Do not use the control pod, control pod arm, faceplate, hood or stub shaft to lift the balancer.
Use help to remove the balancer from the pallet. The
unit is heavy and the weight is not evenly distributed. Dropping the unit may cause personal injury or
equipment damage.
4. Lift the balancer off the pallet.
5. Open the accessory box and remove the hood assembly
hardware and hood spring.
6. Install the hood stop if not already pre-assembled.
Improper hood assembly installation may result in
mechanical switch damage causing the balancer not
to operate. Use help and carefully follow the hood
assembly installation instructions as described
below.
CAUTION
CAUTION
CAUTION
Direct Drive
2 • COATS 850SS Wheel Balancer
Figure 2 - Space Requirements
6 Ft.
6 Ft.
7 Ft.
7. Locate the hood assembly.
8. Slide one flanged bearing onto the stationary hood bar;
flange to cam (figure 3).
9. Locate the slot on the hood bracket labeled "Install Pin
Here". The slot is covered by Styrofoam to separate and protect
the mechanical switches, shown in figure 4, that are located
inside the hood bracket. During installation the switch actuator
rod (figure 5) located on the hood assembly can damage these
switches if you are not careful.
10. Next, install the hood assembly to the hood bracket.
Carefully line up the switch actuator rod so that it contacts the
Styrofoam in the middle of the slot and remains centered as the
stationary hood bar is pushed in. As the stationary hood bar is
pushed in, the actuator rod must push the Styrofoam in. Refer
to figure 6. Be sure the Styrofoam is pushed clear. If not, use a
small screwdriver to push it in and out of the way.
11. Slide the other flanged bearing into position followed by
the washer, retainer and cap plug (figure 3).
12. Raise the hood all the way and verify that the hood stop
bracket on the side of the hood contacts the rubber hood stop
solidly. Lower the hood and verify that the other end of the hood
stop bracket contacts the rubber hood stop solidly.
13. Raise the hood and hold it up.
Use help to hold the hood while attaching the hood
spring. Attaching the spring without holding the
hood in place may cause it to snap open suddenly,
resulting in personal injury.
14. Connect the hook end of the hood spring to the hood
cam stud.
15. Hook the other hook end of the hood spring under the
balancer.
16. Raise and lower the hood to verify proper operation.
17. Install any accessory items at this time. Contact your
Hennessy Representative to order additional accessory items.
CAUTION
Direct Drive
COATS 850SS Wheel Balancer • 3
Figure 6 - Slot on the Hood Bracket
Styrofoam Separating
Hood Switches
Switch Actuator Rod
must Contact Styrofoam
at Center of Slot
Figure 4 - Mechanical Hood Switches inside the
Hood Bracket
Figure 3 - Hood Assembly Installation
Figure 5 - Actuator Rod on the Hood Bar Assembly
Mechanical Hood Switches
Hood Switch
Actuator Rod
Hood
Bracket
Stationary
Hood Bar
Hood Switch
Actuator Rod
Center in Slot
Flanged
Bearing
Flanged
Bearing
Washer,
1-1/2 ID
Retainer
Cap Plug
Connect to Power
Your factory trained COATS®Service Technician should do the
final check to verify the power installation before connecting the
balancer to a power supply. Failure due to improper power connection will void the warranty.
Connect the balancer to an appropriate electrical receptacle.
Refer to Electrical Requirements on page 1.
Note:
If pedestrian or equipment traffic might damage the
standard power cord, power outlets must be enclosed in a raceway on the floor or in an overhead drop.
Note:
Electric outlets must be solidly connected. There should
be less than 1 Ω electrical resistance between the ground pin
and earth ground. The installer or electrical inspector must verify the outlet installation before connecting the balancer. Failure
due to improper power connection will void the warranty.
Note:
The green wire in the cord is the grounding wire. Never
connect the green wire to a live terminal.
Initial Testing
This should be performed by your factory trained COATS
(r)
Service Technician.
1. POWER - Turn on the power to the outlet circuit breaker.
Plug the balancer into the outlet. Turn the balancer ON/OFF
switch to the on position.
An electronic BEEP will be heard when the balancer is turned
on.
Note:
The balancer should be left on all day to maintain the
proper operating temperature.
2. DISPLAYS - The inner and outer weight displays will read
the current revision level for the computer software when the
balancer is first turned on.
Two LEDs will flash alternately inside the inner and outer
weight displays.
The Dynamic LED and Ounce LED will illuminate.
3. OPERATION - Mount a wheel on the shaft, lower the hood,
and push the START button. The arbor faceplate should rotate
clockwise (figure 7).
Important:
If an ERROR 4 message appears, the wheel is
rotating counter-clockwise. Turn the machine off and refer to
service instructions. Disregard a short spin cycle with an inner
display reading of HUB during this initial testing.
Direct Drive
4 • COATS 850SS Wheel Balancer
Figure 7 - Slot on the Hood Bracket
Figure 8 - Back Cone Mounting
Figure 9 - Front Cone Mounting
Important:
To be sure the wheel centers properly, rotate the
wheel on the arbor while tightening the hub nut.
Back Cone Mounting
This mounting method places the spring and cone between
the arbor faceplate and the wheel. The cone centers the wheel
from the back side (figure 8).
1. Place the spring on the arbor with the large end towards
the arbor faceplate.
2. Select the cone that best fits the center hole.
3. Slide the cone onto the arbor large end first.
4. Place the wheel onto the arbor and center it on the cone.
5. Screw the pressure cup/hub nut assembly onto the arbor
and against the wheel. Securely tighten the assembly.
Front Cone Mounting
This method should be used only when the inner surface of
the wheel center hole does not provide an accurate surface for
centering (figure 9)
1. Remove the pressure cup from the hub nut (if attached).
2. Select the cone that best fits the wheel center hole.
3. Position the wheel onto the arbor and push it back against
the arbor faceplate.
4. Slide the selected cone onto the arbor, small end first, and
push it into the center hole on the wheel. Center the wheel on
the cone.
5. Screw the hub nut onto the arbor. Tighten it securely so
that it pushes the wheel squarely against the faceplate.
Protruding Outer Hub
For wheels with a protruding outer hub which will not permit
the use of the pressure cup, or the cup will not permit the hub
nut to engage the arbor threads at least four full turns (fig. 10).
1. Remove the pressure cup from the hub nut (if attached).
2. Place the spring on the arbor, large end first.
3. Select the appropriate cone for the wheel and slide it onto
the arbor, large end first.
4. Position the wheel on the arbor and center it on the cone.
5. Place the no-mar ring onto the hub nut and screw the
assembly onto the arbor. Tighten it securely against the wheel.
Direct Drive
COATS 850SS Wheel Balancer • 5
Wheel Mounting
The inner side of the wheel hub usually has the most
uniform surface for wheel centering. For an accurate
balance, always center the wheel by using the most
uniform surface of the wheel hub. There are three
ways to mount the tire onto the balancer. Review
them before mounting the wheel to determine the
appropriate mounting method.
Be sure the wheel is forced firmly against
the arbor faceplate and the hub nut
engages the arbor threads for at least four
full turns.
CAUTION
Figure 10 - Protruding Center Hub/No-Mar Ring
Determining Wheel
Measurements
Before a wheel can be balanced, the computer balancer must
know where the wheel weights will be placed in relation to the
arbor shaft. The operator must enter into the computer three different wheel measurements (figure 11).
Distance - A
The first measurement is the distance of the inside of the
wheel rim from the balancer. This location is called the inner
plane. The inner plane tells the computer where the inside
weight will be placed along the shaft.
Wheel Width - W
The second measurement is the wheel width. When entered
by the operator, the computer adds the measurement to the
inner plane distance to establish the outer plane. The outer
plane tells the computer where the outside weight will be
placed in relation to the shaft.
Wheel Diameter - D
The third measurement is the wheel diameter. This measure
tells the computer how far the wheel weight will be placed from
the center of the shaft.
Measuring and Entering A, W, & D
1. Measure the inner plane (A) distance by pulling the dis-
tance arm out of the balancer until it touches the rim( figure 12).
Place the small end of the handle against the recessed portion
of the inside flange of the wheel. Read the last number visible
where the distance arm exits the balancer cabinet.
2. Press A on the control panel, then enter the number read
on the distance scale.
Example:
If the number read on the scale was 7.2, you would
press A, then press 7 and then 2 on the numeric key pad. The
display should read 7.2
3. Place the calipers over the wheel; measure the width of
the wheel. Refer to Figure 13.
4. Press W on the control panel, then enter the width meas-
urement from the calipers.
Example:
If the number read on the calipers was 7.5, you
would press W, then press 7 and then 5 on the numeric key pad.
The display should read 7.5.
5. Locate the tire size specifications on the tire sidewall. Find
the diameter in that specification.
6. Press D on the control panel, then enter the diameter as
read on the tire.
Example:
If the diameter measurement is 15, you would press
D, then press 1 and 5 on the numeric key pad. The display
should read 15.0.
Direct Drive
6 • COATS 850SS Wheel Balancer
Figure 11 - Wheel Measurements
Figure 12 - Inner Plane Measurement
Figure 13 - Using the Calipers to Measure Wheel
Width
Cutaway of Tire
and Wheel
Balancer
Arbor
Inner Plane - A
Outer Plane - W
Wheel Width
Diameter - D
Steel Wheels
Alloy Wheels
Figure 14 - Static Weight Positioning
Figure 15 - Alloy Weight Positioning
Figure 16 - Top-Dead-Center Weight Positioning
Determining Balancing
Mode
Dynamic Balancing
This is the default mode for the balancer.
This mode places weights on both the inner and outer plane of
the wheel.
Static Balancing
This mode determines the position for a single adhesive
weight along the centerline of the wheel. Wheels balanced in
this mode may wobble if the imbalance mass is large enough
and off the centerline of the wheel width. Wobble caused by an
off center imbalance can only be corrected by dynamic balancing of the wheel.
When this mode is selected, the computer automatically calculates the middle of the wheel and the proper weight position.
When attaching the weight, it is important that it be positioned
as accurately as possible at the centerline (figure 14).
Attach the adhesive weight according to the top-dead-center
positioning LEDs as described in the Balancing a Wheel section
on page 8.
Important:
After balancing the wheel, it is necessary to verify
that the weight will clear the brake caliper when the wheel is
mounted on the vehicle. The weight must not contact the brake
caliper, or any other brake components when the wheel is
mounted.
Note:
It is advisable to cover the adhesive weight with a strip
of duct tape to help prevent deterioration of the weight adhesive. Adhesive backed aluminum foil may also be used. Smooth
out the covering to eliminate air pockets and bubbles, and
smooth down all edges and corners.
Alloy Balancing
Balance specialty wheels with adhesive weights in this mode.
The computer automatically calculates the outer weight position
as the centerline of the wheel, and the inner weight position
under the rim flange (figure 15).
Position the weights at top-dead-center as described in the
Balancing A Wheel section. Make sure the outer weight is
placed as accurately as possible to the centerline on a horizontal surface. Cover the weights with duct tape or adhesive
backed aluminum foil as describe in Static Balancing (figure 16).
Direct Drive
COATS 850SS Wheel Balancer • 7
8 • COATS 850SS Wheel Balancer
Direct Drive
Balancing a Wheel
1. Mount the wheel using the appropriate mounting
method.
2. Enter the A, W, and D measurements as
described in Determining Wheel Measurements section.
Note:
These measurements must be entered into
the balancer before attempting to balance a wheel. If
any of the measurements remain at zero, the balancer
will display the appropriate letter (A, W, or D) for the
missing measurement in the left display. The right display will read ERR.
3. Select a balancing mode. Press the MODE but-
ton until the LED next to the desired balancing mode
is illuminated.
4. Lower the hood. The hood interlock will not allow
the wheel to spin with the hood raised.
5. Press START. The wheel will spin and brake to a
stop. The necessary weight amounts will be displayed.
6. Lift the hood.
7. Rotate the wheel until the outer weight position-
ing LEDs flash. This indicates that the weight should
be attached at top-dead-center on the outer plane with
the wheel in this position.
8. Attach the appropriate weight to the outer plane.
9. Repeat steps 6 and 7 for the inner plane, if
weights are to be attached to that plane. Your selected
balancing mode will determine where the weights are
attached.
10. After weights are attached, lower the hood and
press START.
11. The wheel will brake to a stop after a full spin
cycle, and the displays should read 0.00.
If the displays indicate additional weights are
needed, consult the Balance Checking section for possible causes and corrective action.
Balance Checking
After balancing the wheel, the wheel should be respun to check for accuracy. These steps, when followed carefully, will produce a highly accurate wheel
balance.
1. Lower the hood and press START.
2. If the displays indicate additional weight is
required in the same location as the first weight, the
first weight was too small. Replace the weight with
the correct weight and re-spin.
3. If the additional weight position on the re-check is
directly opposite the first, the first weight was too
large. Replace the weight with the correct weight and
re-spin.
4. If the balancer indicates an additional weight
should be applied at an angle to the first weight, the
first weight was not applied at the correct position. To
correct, move the first weight toward the indicated
second position, or add the second weight where indicated.
5. Be sure all the weights are securely attached to
the wheel.
Figure 17 - Flashing Positioning LEDs
COATS 850SS Wheel Balancer • 9
After Balance Vibration Checklist
Drive the vehicle on a smooth road after balancing
the wheels. If vibration is still present, remove the
wheels and re-balance. If a wheel is out of balance,
the cause may be:
1. A weight has come off the wheel. Remove the
weights from the wheel and rebalance. If the balancer
still indicates the wheels are balanced with 0.5 ounce
on both inner and out displays, the problem is not in
the balance of the wheel.
2. Tire pressure may be wrong. Bring all tires up to
the manufacturer's recommended pressure.
3. Radial or lateral runout in the tire or wheel.
Replace the damaged part.
4. Foreign material inside the tire. Demount the tire
and remove the material. Remove the wheel weights
and rebalance the tire and wheel.
5. Imbalanced wheel covers or trim rings. Remove
the covers or rings and test drive. If vibration is gone,
remove the threaded arbor from the balancer faceplate and use the optional Combi-Adapter to mount
and balance each wheel with the cover or ring
attached.
6. Incorrectly mounted wheel. Remount correctly.
7. Damaged wheel bolt holes. Replace wheel.
8. Worn universal joints. Replace joints.
9. Drive shaft imbalance or damage. Balance, repair,
or replace the shaft.
10. Imbalanced brake rotor(s) or drum(s).
11. Suspension out of alignment. Align the vehicle,
replace damaged or worn parts.
12. Tire slippage on the wheel. Demount the tire
and remount using tire lubricant and inflate to the
proper PSI. Rebalance the tire.
Extended Functional Capability
The balancer will re-evaluate the data it derives from
the spin cycle when one or all of the A, W, or D values
are changed, or when a new balancing mode is
selected. The new weights and positions will be displayed without re-spinning the wheel.
If, after the spin cycle has been completed, you discover that the A, W, or D measurements were entered
incorrectly, simply press the appropriate key (A, W, or
D) and enter the correct number. The weight displays
and positioning will change as required.
If, after the spin cycle has been complete, you
decide to change balancing modes, simply press the
MODE key until the desired mode is selected. The
weight displays and positioning will change as
required.
Gram/Ounce Selection - To change from ounce to
gram, or gram to ounce, press the CODE key, then 0
on the numeric key pad, then 5, and then A. The
appropriate LED will illuminate (OUNCE of GRAM).
The displays continue to function in the same manner
whether ounce or gram is selected.
Direct Drive
10 • COATS 850SS Wheel Balancer
Direct Drive
Maintenance and
Calibration
Preventative Maintenance
1. Keep adapters, faceplate, threaded arbor, and
hub nut clean. Grease and dirt build-up will result in
premature wear and inaccurate balancing. Clean at
least once a day with a vaporizing solvent.
2. Keep the balancer clean, remove all trash, old
weights, and other items from the balancer and the
operating area.
3. Only use approved standard and optional acces-
sories with the balancer.
Calibration
After positioning the balancer in the shop and connecting it to the power supply, it should be calibrated
before attempting to balance a wheel. Once calibrated, the balancer will automatically measure the
imbalance and positions sensed from the spinning
wheel with extreme accuracy. The balancer does not
require daily calibration, and no further adjustments
should be needed.
Calibration requires a tire/wheel assembly that
meets the following criteria:
1. The inner flange of the wheel, A measurement,
must be between 5 and 8 inches from the balancer
cabinet when mounted on the arbor.
2. The width, W measurement, must be between
5.5 and 7 inches.
3. The tire/wheel must be a 14, 15, or 16-inch diam-
eter by 6 to 6-1/2-inch wide steel wheel with tire
mounted and properly inflated.
Perform the calibration procedure this way:
1. Securely mount an appropriate calibration wheel
on the balancer arbor.
2. Enter the A, W, and D measurements for the
wheel.
3. Remove all weights from the wheel.
4. Press CODE on the key pad, and then press 9,
then 1, then A. This places the balancer in the calibration mode.
5. Lower the hood.
6. Press START to cycle the balancer.
7. After the wheel has stopped, rotate it until the 2
LEDs next to the outer weight display flash alternately.
8. Attach a 4 ounce calibration weight if in ounce
mode or 100 gram calibration weight if in gram mode
to the outer plane of the wheel at top-dead-center.
Accurate placement is essential to achieving an accurate calibration.
9. Lower the hood.
10. Press START to cycle the balancer.
11. When the wheel comes to a stop, the balancer
is calibrated. Remove the wheel from the balancer,
and remove the calibration weight from the wheel.
COATS 850SS Wheel Balancer • 11
Error Messages and
Function Codes
Error Messages
The following codes may appear in the weight dis-
plays to indicate a problem with the balancer.
A ERR - The distance from the balancer to the inner
rim of the wheel was not entered.
W ERR -The width of the wheel was not entered.
D ERR - The diameter of the wheel was not
entered.
ERR 1 - Wheel moved, but stopped for some
reason.
ERR 2 - Wheel did not come up to speed in 26
seconds.
ERR 3 - Wheel did not turn when the START button
was pushed. Alternatively, no optical
signals.
ERR 4 - Wheel rotates counter-clockwise.
ERR 5 - Cycle did not complete within 26 seconds.
ERR 6 - No power to optical encoder.
ERR 7 - Overspeed.
ERR 8 - Time to set gain is too long.
ERR 9 - Measurement time is too long.
ERR 10 - Measurement speed is too slow.
HOOD - Hood up during wheel motion.
HUB - Wheel reached speed too quickly.
Function Codes
CODE 9 1 A - Perform Calibration
CODE 0 3 A - Clear
CODE 0 4 A - Toggle High Resolution Mode on/off
CODE 0 5 A - Toggle Gram/Ounce Mode on/off
CODE 3 7 A - Adjust top-dead-center position error
Direct Drive
12 • COATS 850SS Wheel Balancer
Direct Drive
Notes
COATS 850SS Wheel Balancer • 13
Notes
Direct Drive
8111812 08 06/08 © Copyright 1995, 1999, 2000 Hennessy Industries and COATS All Rights Reserved Printed in USA
Loading...