Snap-On EEWB331B User manual

EEWB331B
MOTORIZED WHEEL BALANCER
OPERATOR’S MANUAL

ii EEWB331B

3
EEWB331B
IMPORTANT SAFETY INSTRUCTIONS
•Basic safety precau•ons should always be followed.
Wear safety goggles.
Read and follow all Instruc!ons and safety messages.
Wear appropriate clothing; keep hair and loose "#ng clothing, your hands
and all parts of your body away from moving parts.
Eye injury or other bodily injury can result from flying par•cles or entanglement with
moving parts.
•Electric powered wheel balancer can cause shocks, fire or explosion.
Do not operate the wheel balancer with a damaged power cord or plug.
Do not use on wet surfaces, outdoors or expose the balancer to rain.
Unplug the power cord when the balancer is not in use.
If an extension cord is used, make sure that it is in good condi!on and that the cur-
rent ra!ng is 10 Amps or higher.
Use only in well ven!lated areas.
Do not operate the balancer in the vicinity of $ammable liquids (gasoline) or below
grade or in an explosive atmosphere.
Electric shock, fire or explosion can cause serious injury or death.
•Misuse of this wheel balancer can result in accidents.
Do not allow untrained or unauthorized personnel to operate the balancer.
Do not disable or bypass the hood safety interlock system.
Always securely !ghten the quick nut that holds the wheel in place during the
moun!ng procedure.
Improperly balanced wheels can cause damage to the vehicle or automo•ve acci-
dents. Personal injury can result from altera•on to the balancer or improper use.

4EEWB331B
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS.......................................................................................3
1.0 INTRODUCTION...........................................................................................................................5
1.1 SAFETY NOTICE..........................................................................................................................5
1.2 BALANCER APPLICATION ..........................................................................................................5
1.3 EEWB331B SPECIFICATIONS ...................................................................................................6
1.4 FEATURES ................................................................................................................................... 6
1.5 STANDARD ACCESSORIES........................................................................................................7
1.6 OPTIONAL ACCESSORIES .........................................................................................................7
1.7 DIMENSIONS OF THE MACHINE................................................................................................8
1.8 REQUIRED INSTALLATION AREA...............................................................................................8
1.9 INSTALLATION INSTRUCTIONS .................................................................................................8
2.0 BALANCER INSTALLATION......................................................................................................... 9
2.1 HOOD GUARD INSTALLATION ...................................................................................................9
2.2 ELECTRIC INSTALLATION ..........................................................................................................9
3.0 TERMINOLOGY..........................................................................................................................10
3.1 THE INPUT PANEL..................................................................................................................... 10
4.0 OPERATION OF THE BALANCER.............................................................................................12
4.1 CHECK LIST - INSPECTION...................................................................................................... 12
4.2 WHEEL MOUNTING...................................................................................................................13
4.2.1 STANDARD WHEELS (BACK CONE MOUNT).........................................................................13
4.2.2 CENTERING LIGHT-TRUCK WHEELS .....................................................................................13
4.2.3 WHEEL MOUNTING REQUIRING SPECIAL TOOLING ............................................................14
4.3 MODE SELECTION....................................................................................................................14
4.3.1 WEIGHT PLACEMENT MODES.................................................................................................14
4.3.2 SAPE ARM POSITIONS FOR ALU WEIGHTS PLACEMENT....................................................15
4.4 SELECTING OPERATOR PREFERENCES...............................................................................16
4.4.1 FINE BALANCING MODE .......................................................................................................... 16
4.4.2 OUNCE/GRAMS CONVERSION................................................................................................ 16
4.4.3 RIM DIAMETER IN MILLIMETERS ............................................................................................ 16
4.5 ENTER RIM PARAMETERS ......................................................................................................16
4.5.1 RIM DISTANCE AND DIAMETER (OFFSET) ............................................................................16
4.5.2 MEASURE/ENTER RIM WIDTH (MANUAL) ............................................................................. 16
4.5.3 MANUAL PARAMETER ENTRY .................................................................................................17
4.5.3.1 MANUAL RIM DIAMETER ENTRY............................................................................................. 17
4.5.3.2 MANUAL DISTANCE ENTRY .....................................................................................................17
4.6 Easy Alu FUNCTION...................................................................................................................17
4.6.1 AUTOMATIC RIM DIMENSION READING/SETTING AND ALU MODE ....................................17
4.7 CORRECTION OF THE IMBALANCE ........................................................................................18
5.0 ALU 2P AND 3P BY GAUGE ARM..............................................................................................20
6.0 SPOKE BALANCING MODE ......................................................................................................21
6.1 SPLIT WEIGHT MODE (SWM) ...................................................................................................21
7.0 USER CALIBRATION .................................................................................................................22
8.0 USER FUNCTIONS ....................................................................................................................23
8.1 DATA RECALL ............................................................................................................................23
8.2 WEIGHT UNIT TOGGLE MODE.................................................................................................23
8.3 DIMENSION UNIT TOGGLE MODE........................................................................................... 24
8.4 ANTI-SLIP FUNCTION................................................................................................................24
9.0 OPTIMIZATION/WEIGHT MINIMIZATION. ................................................................................. 25
10.0 TROUBLE SHOOTING ............................................................................................................... 33
10.1 SYSTEM MESSAGES ................................................................................................................34
10.1.1 C CODES.................................................................................................................................... 34
10.1.2 E-CODES.................................................................................................................................... 36
10.1.3 H CODES - WARNING ...............................................................................................................38
11.0 MAINTENANCE .......................................................................................................................... 38

5
EEWB331B
1.0 INTRODUCTION
Congratulations on purchasing the EEWB331B motorized wheel balancer. This wheel balancer is designed
for ease of operation, accuracy, reliability and speed. With a minimum of maintenance and care your wheel
balancer will provide many years of trouble-free operation.
Instructions on use, maintenance and operational requirements of the machine are covered in this manual.
STORE THIS MANUAL IN A SAFE PLACE FOR FUTURE REFERENCE.
READ THIS MANUAL THOROUGHLY BEFORE USING THE MACHINE.
1.1 SAFETY NOTICE
This manual is a part of the balancer product.
Read carefully all warnings and instructions of this manual since they provide important information concerning
safety and maintenance.
1.2 BALANCER APPLICATION
The Snap-on wheel balancer model EEWB331B is intended to be used as equipment to balance car and light
truck wheels within the following range:
Maximum wheel diameter : 42” (1067mm)
Maximum wheel width : 20” (508mm)
Maximum wheel weight : 120 lbs / 54.4 kg
This equipment is to be only used in the application for which it is specifically designed.
Any other use shall be considered as improper and abusive.
The manufacturer shall not be considered liable for possible damages caused by improper, wrong, or abusive
use of this equipment.

6EEWB331B
1.3 EEWB331B SPECIFICATIONS
Motorized digital wheel balancer for car, light truck
wheels.
Weight Imbalance Accuracy 0.10 oz. / 2.8 grams
Weight Placement Resolution ± 0.7 degrees
Weight Imbalance Resolution:
Roundoff Mode 0.25 oz. / 5 grams
Non-Roundoff Mode 0.05 oz. / 1 gram
Max. Shaft Weight Capacity 120 lbs / 54.4 kg
Max.Tire Diameter 42” / 1067 mm
Rim Width Capacity 3”-20” / 76 mm - 508 mm
Rim Diameter Capacity 8”-30” / 203 mm-762 mm
Balancing Cycle Time. 6-8 seconds
Shaft Speed at calculation 200 RPM
Electrical Requirements 115vac, 1ph, 60Hz, 10A
Required Work Area 100” x 67” (2540 x1702 mm)
Shipping Weight, complete 325 lbs/147 kg
Shipping Dimensions (HxWxD) 52.75” x 41.5” x 37”
Machine Dimensions (HxWxD) 70” x 59” x 45”
Actual Weight with Accessories 309 lbs (140 kg)
Operating Temperature Range 32-122F (0-50C)
1.4 FEATURES
ACCURACY
• Weight placement accuracy is ± 0.7°
• Weight imbalance accuracy to 2.8 grams.
• Self test check with every power up cycle.
• Fast operator calibration.
• Pre-programmed Error Codes indicate procedural
errors or safety concerns.
SPEED and DURABILITY
• Automatic distance and diameter entry. Simply
touch the SAPE arm to the wheel, the distance and
diameter parameters are automatically entered.
• Quick clamp speed nut reduces wheel mounting time.
• Captured back spring eliminates having to handle
the backing spring.
• Quick cycle time of 6 to 8 seconds
• Automatic recalculation if weight positions are
changed. No need for re-spinning the wheel.
• Common 40 mm diameter mounting shaft.
• Weight pocket storage tray.
• Easy-to-Read Data display.
• Easy weight tray access.
SOFTWARE VERSATILITY
• Both dual weight Dynamic and single weight Static
capability.
• Match Balance program for reducing weight re-
quired.
• Built-in spin counter for monitoring balancer pro-
ductivity.
• Service code access to all Balancer electronic
functions for fast, easy diagnosis.
• Operator selectable round-off mode.
• Easy Alu enter the rim dimensions and automati-
cally select a “P” balancing mode.
• 5 Aluminum Modes
• 2 Alu-S modes
• Hidden Weight (Spoke) mode
• Ounce / Gram toggle from front panel
• Multiple operator feature allows several operators
to recall wheel parameters.

7
EEWB331B
1.5 STANDARD ACCESSORIES
Standard accessories ( Figures 1, 2, and 3,) included
with the EEWB331B are:
1 EAM0003J69A Cone, 87-137 mm / 3.4”-5.4”
2 EAM0005D25A Cone, 96-114 mm / 3.8”-4.5”
3 EAM0005D24A Cone, 71-99mm /2.8”-3.9”
4 EAM0005D23A Cone, 40-76mm / 1.6” -3.0”
5 EAC0058D07A Cup -Pressure
6 EAC0058D08A Disk -Pressure
7 EAA0263G66A Quick Nut
8 EAM0005D40A Weight -Calibration
9 EAM0021D90A Standard 40mm Stub Shaft
10 EAA0247G21A Caliper -Rim Width
11 EAC0060G02A Flange -Cover, Hook
12 EAM0006G01A Pin -Accessory
13 WWPR13A Weight Pliers
14 EAM0005D34A Fastening Rod
15 EAC0058D15A Soft Protector Ring
Figure 3 - Plier
Figure 1
Figure 2 - Rim width gauge
1.6 OPTIONAL ACCESSORIES
EEWB3-1A
Car, SUV and Lt Truck Pin Plate Set
EEWB3-5 Spacer EEWB3-4
9-pc Collet Set
EEWB3-1A Car, SUV and Lt Truck Pin Plate Set
EEWB3-4 9-pc Collet Set
EAK0309J20A Stand
Weight Pliers (Figure 3).
Versatile weight hammer/plier. In addition to hammering
on weight and used weight removal, the hammer/plier
can be used to reshape worn weight clips and trim
weight to size.

8EEWB331B
PRE-INSTALLATION CONSIDERATIONS
1.7 DIMENSIONS OF THE MACHINE
Figure 5 - Recommended Work Area
1.9 INSTALLATION INSTRUCTIONS
CAUTION! CAREFULLY REMOVE THE BALANCER
FROM THE PALLET.
Remove the hardware that secures the machine
to the pallet and slide the balancer onto the floor
where it is to be installed.
THE UNIT IS HEAVY AND THE WEIGHT IS NOT
EVENLY DISTRIBUTED.
DO NOT LIFT THE BALANCER BY THE SHAFT.
DROPPING THE UNIT MAY CAUSE PERSONAL
INJURY OR EQUIPMENT DAMAGE.
!!IMPORTANT!!!
Machines are shipped calibrated from the
factory. Do not attempt fi eld calibration
unless balance results deem calibration
as necessary.
62” 38”
67”
Figure 4 - Actual Hight.
1.8 REQUIRED INSTALLATION AREA
Make sure that from the operating position the user
can see all of the machine and the surrounding area.
The operator should prevent non authorized persons
and/or objects from entering the area which may create
potential hazards.
The machine should be installed on a stable level floor.
Do not install the machine on a uneven floor.
If the balancer is to be installed on a raised floor, the
floor must have a capacity of at least 110lbs per sq ft.
(5000 N/m² - 500 kg/m²).
It is not required to secure the machine to the floor.
Install the machine in a dry, covered area.
The installation of the machine requires a working area
of at least 100” x 67” (2540mm x 1702 mm) (Figure 5).
NOTE: Do not install the balancer below grade level
or in a pit.
70”

9
EEWB331B
2.1 HOOD GUARD INSTALLATION
The safety hood guard is standard equipment and
must be installed prior to use.
Refer to Figure 8 for hood guard installation.
Parts Required:
(1) Hood Guard Assembly
(2) 3/8” - 16 x 2” HHCS
(2) 3/8” x 16 Keps
Position the hood guard in the raised (up) position.
Slide the hood guard support tube over the frame pivot
shaft protruding from the right side of the balancer
cabinet.
Line up the mounting holes in both the pivot shaft
and the guard support tube. Secure the guard with
3/8” hardware (Figure 8).
Figure 6
2.0 BALANCER INSTALLATION
Mounting the Shaft Adapter
IMPORTANT!
CHECK THAT THE SURFACES ARE PERFECTLY
CLEAN AND NOT DAMAGED. AN INCORRECT
MOUNTING MAY RESULT IN SIGNIFICANT
IMBALANCE.
A. Mount the threaded shaft onto the arbor of the
balancer. Tighten !rmly using supplied rod. (Figure 6).
C. Place cones and other accessories onto the
accessory pins.
B. Install the accessory pins (Figure 7). Tighten !rmly.
2.2 ELECTRIC INSTALLATION
ANY ELECTRIC AL WIRIN G MUS T BE
PERFORMED BY LICENSED PERSONNEL.
ALL SERVICE MUST BE PERFORMED BY AN
AUTHORIZED SERVICE TECHNICIAN.
Check on the plate of the machine that the electrical
speci!cations of the power source are the same as
the machine. The machine uses 115VAC, 60Hz, 1Ph.
A 10 amperes power line capacity is recommended .
NOTE: Any electrical outlet installation must be
verified by a licensed electrician before connecting
the balancer.
NOTE: This machine performs a self-test routine on
start-up. There will be a delay of several seconds
before the display is activated.
Figure 7
Figure 8

10 EEWB331B
3.0 TERMINOLOGY
Before using the wheel balancer it is suggested that
you become familiar with the terminology and features
of the machine’s components. Refer to Figures from
13 to 14 for identi!cation and location.
Figure 13
Figure 13a
1
2
3
4
5
6
7
8
9
3.1 THE INPUT PANEL
INPUT PANEL - Figure 13a
1. Diameter key with indicator
Press to select “rim diameter” mode. The diameter
indicator will light up, the unit will beep. The current
value will be shown on the display and can be edited.
2. Width key with indicator
Press to select “rim width” mode. The width indicator
will light up, the unit will beep. The current value will
be shown on the display and can be edited.
3. Offset key with indicator
Press to select “offset” mode. The offset indicator
will light up, the unit will beep. The current value will
be shown on the display and can be edited.
Pressing the offset key in HWM enables the operator
to enter the plane reference points again.
4. + key
To increase an input value (e.g. rim diameter, offset,
rim width).
Hold down to change the value shown automatically.
5. Enter key
Press to con!rm input (dimension, mode) or save
“user” settings. The unit will beep.
6. - key
To decrease an input value (e.g. rim width, offset,
rim diameter).
Hold down to change the value shown automatically.
7. MODE key with indicator
Press to scroll along the special modes. The MODE
key indicator will light up, the unit will beep.
8. Fine key
Press to toggle the read-out accuracy between
roundoff mode (0.25 oz) and non-roundoff mode
(0.05 oz). The unit will beep. Combined with the
“MODE” key, it starts the calibration function.
9. ALU Weight Selection
Press to select the required weight application mode
(weight mode), the unit will beep. Combined with the
“MODE” key, it starts the “user” function.
10.Stop key
Press to stop a spinning wheel.
10
USER INTERFACE - Figure 13
1. Position Indicator LEDs - Displays the location for
wheel weight placement.
2. Inside Weight Amount and Function Display
Window Shows inside or left weight amount and
various operation messages.
3. Outside Weight Amount and Function Display
Window Shows outside or right weight amount and
various operation messages.
4. Function Indicator LEDs - indicating active functions
and weights placement positions. They allow to
check the applied selections.
5. Input panel - it allow the main user selections.
1
2 3
4
5

11
EEWB331B
Figure 14
12
13
14
15
16 18
CABINET - Figure 14
12. Display - Easy to read, user friendly display
featuring large LEDs and one button functions.
13. Weight Storage Tray - Generous storage for a
variety of weight pro!les and sizes as well as built
in storage pockets for the standard centering cones.
14. Accessory Storage - Four sturdy side mounted pegs
are supplied for storage of additional accessories.
15. Wheel Guard Assembly.
16. Semi-Automatic Parameter Arm - Rim distance
and diameter is automatically input with the SAPE.
The SAPE is also used in several procedures for
determining accurate rim pro!les and tape weight
placement.
17. Foot Operated Shaft Lock - A foot operated shaft
lock is used to lock the shaft during the weight
placement process.
18. Shaft Adapter - A common 40 mm size shaft is
used. The easily removable shaft can be replaced
for service or during use of certain wheel adapters.
17
1
2
Figure 14a
Figure 14b
MAIN SHAFT LOCK - Fig. 14a
This assists tightening or loosening of the clamping nut.
Note:
This lock is designed only to facilitate orientation
of the wheel and must not be used for braking the
main shaft spin.
SAPE PARAMETER ARM - Fig. 14b
SAPE arm for distance and rim diameter.
1 SAPE
arm, can be extended and hinged upwards.
2 SAPE disk to identify rrim dimensions on all types
of RIM pro!les.

12 EEWB331B
4.0 OPERATION OF THE BALANCER
WARNING: For operator safety please read and
follow the precautions outlined on pages 1 and 2
of this manual.
NOTE: Read all instructions before proceeding with
operation of the balancer.
All balancer functions are input into the main computer
through the large easy to read touch panel. Although
each wheel tire assembly differ in some ways all bal-
ancing jobs require basically the same procedure. The
order of events to take place are:
1. Inspection of the wheel/tire assembly
2. Mounting wheel onto shaft or adapter
3. Selection of Balancing Mode and Preferences
4. Entry of wheel parameters
5. Spinning the wheel
6. Applying the recommended weight
7. Check spin if desired
8. Dismounting the wheel
The following operation instructions will follow the basic
outline above.
4.1 CHECK LIST - INSPECTION
Observe Before Balancing Wheel
1. Check for proper air pressure. If not correct, inflate
to correct pressure.
2. Check for any foreign material inside tire. If present,
remove before balancing tire.
WATER IS FOREIGN MATERIAL!
3. Remove old weights — old weights may be improper
value or in wrong location.
4. Be sure tire and wheel are free of excessive dirt,
rust and large stones. Use wire brush on back side of
wheel if necessary.

13
EEWB331B
4.2 WHEEL MOUNTING
Nearly all standard wheels and many alloy wheels have
accurately machined center holes, and they should be
mounted with center cones. Accurate balancing depends
on accurate mounting of the wheel and correct seating of
the cone in the pilot hole. Insure that the wheel is centered
on the shaft exactly as it will be mounted to the vehicle.
Before starting any balancing procedure it is very
important that the wheel is mounted on the machine
with the proper adaptors. An incorrect centering of the
wheel will result in considerable imbalance.
There are many types of wheels and Snap-on supplies
adaptors of good quality and durability for the large
majority. However if you meet special wheels which may
require a speci!c adaptor, call your Snap-on distributor.
Rims may be divided into these major groups:
1. Car rims with a true center hole.
2. Car rims without a center hole.
3. Car rims with an untrue center hole.
4. Light truck rims.
5. Lug centric wheels
6. Clad wheels
4.2.1 STANDARD WHEELS (BACK CONE
MOUNT)
Mount the wheel as detailed below in Figure 15
Figure 15
1. Mount proper cone against spring plate.
2. Mount wheel on shaft in the same manner as you
would on the car.
3. Mount pressure cup on shaft and place against
outside of wheel, follow with the Quick-nut.
4. Tighten Quick-nut securely with both hands. To
operate the Quick-nut pull the lock-unlock lever
(Figure 16). Slide the Quick-nut on the threaded
shaft. When in contact with the rim, release the
unlock lever and tighten !rmly. To assist in cen-
tering the wheel properly, rotate the wheel on the
shaft while tightening the quick nut.
FAILURE TO TIGHTEN WING NUT SECURELY
MAY RESULT IN SERIOUS PERSONAL INJURY.
DO NOT USE A HAMMER TO TIGHTEN THE
QUICK NUT.
TO RELEASE THE QUICK NUT, UNSCREW
A FEW TURNS TO REDUCE THE AXIAL
PRESSURE, THEN PRESS THE UNLOCK
LEVER AND SLIDE AWAY FROM THE SHAFT.
5. Check that the wheel rotates true by turning the wheel
several revolutions while noting any excessive runout.
4.2.2 CENTERING LIGHT-TRUCK WHEELS
An optional offset spacer may be required for some
light truck wheels and reverse-offset wheels that must
be moved away from the balancer mounting "ange.
The extension adaptor is often used with the 5-1/4 inch
diameter light truck cone. (p/n EEWB-5)
Install the spacer on the mounting "ange, then mount
the wheel, using the front cone method (Figure 17)
Figure 17
#
Figure 16

14 EEWB331B
4.2.3 WHEEL MOUNTING REQUIRING
SPECIAL TOOLING
Clad wheels: A Clad Wheel is a wheel casting that is
balanced but the wheel face is not !nished. To !nish
the wheel face a plastic chromed face is bonded to
the casting.
A clad wheel must be centered properly from the back
side of the wheel using precision collets instead of a
centering cone. A precision collet is normally a dual
sided centering device with low tapers on each side
and has a length of approximately 1.5 inches.
The bene!t of a precision collet is it !ts very precisely
into the tapered machining on the back side of a cast
wheel and the collet does not protrude into the wheel
center. A cone also offers precision centering, but a
cone can have a length from the long to short end of
the taper of two inches or more. A taper cone unlike a
precision collet, will intrude into the wheel center.
On many clad wheels there are plastic tabs to hold the
cosmetic cover in place. It is also necessary to use a
pin plate in the front of the wheel.
The standard pressure cup may crack the plastic clad-
ding.
A centering cone can break off the tabs. See section
1.6 OptionalAccessories for tooling recommendations.
4.3 MODE SELECTION
The majority of balancing takes place in the default
2-plane dynamic mode which is displayed as “2 PL”
(location 1). Hammer-on clip weights will be placed
on both inside and outside of the rim edge. If required,
select an optional weight placement mode by pressing
the Mode button until the appropriate placement mode
is displayed.
4.3.1 WEIGHT PLACEMENT MODES
Before Spinning the wheel (although it may be done
afterwards) choose the appropriate balancing mode
for the wheel. To select the various placement modes
press the (9) Weight selection button;
until placement LEDs indicate desired placement
position.
A. DYNAMIC (two planes), suggested for all steel rims.
In this case the wheel weights must be clipped onto the
rim edges. This function is selected as a default and
the LEDs corresponding to the wheel weight location
are lit on (Figure 19)
Figure 19
B. STATIC (single plane - Figure 20). Suggested for
narrow rims (3” or less). Use a single corrective weight
placed in the center of rim as illustrated in Figure 20.
Figure 20
To select the STATIC Mode:
1. Touch the SAPE arm to the rim "ange.
2. Enter the rim width dimension.
3. Press Alu button (9) four times.
WEIGHT COMBINATION MODES USING THE
WEIGHT SELECTION BUTTON
See (Figure 21). Pressing the weight selection button
(9) will toggle the LED’s to the weight default selections
as shown. Balancing using a combination of hammer-on
and adhesive weights as shown in Figure 21.
Figure 21
9

15
EEWB331B
4.3.2 SAPE ARM POSITIONS FOR ALU
WEIGHTS PLACEMENT
Fig. 22 shows the corrected reading positions of the SAPE
arm (1), and the corresponding weight placement locations
(2); for both adhesive weights and clip-on weights.
Weight Placement illuminated indicators indicate the
weights placement positions on the rim.
—= SAPE arm application point (1).
= weight placement location (2).
Normal Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. This
mode requires the use of clip-on weights.
Alu 1 Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. Press
the Alu key (9) once. This mode requires tape
(or adhesive) weights.
Alu 2 Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. Press
the Alu key (9) twice. This mode requires tape
(or adhesive) weights.
Alu 3 Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. Press
the Alu key (9) three times. This mode requires
tape (or adhesive) weights.
Alu 4 Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. Press
on the Alu key (9) six times. This mode requires
tape (or adhesive) weights.
Alu 5 Touch the SAPE arm to the rim flange (a).
Manually input the rim width dimension. Press
on the Alu key (9) seven times. This mode
requires tape (or adhesive) weights.
Alu 1P Touch the SAPE arm to the rim flange (b). Press
the weight placement key (9) once.
Manually input the rim width dimension.
- Use the SAPE arm to apply adhesive weights
to the inside of the rim, and manually place the
weights on the outside of the rim.
Note: Make sure all entries are completed prior to
balancing spin.
Alu 2P Touch the SAPE arm to locations (b-c).
- Use the SAPE arm to place the weights in both
locations. The machine will beep during weight
placement when the exact location is achieved.
Alu 3P Touch the SAPE arm to locations (a-c).
- Use the SAPE arm to place the adhesive
weight in location (c). The machine will beep
during weight placement when the exact
location is achieved. The inside weight is
placed as a standard clip-on style weight.
9
Figure 22

16 EEWB331B
4.4 SELECTING OPERATOR PREFERENCES
4.4.1 FINE BALANCING MODE
This balancer measures with the maximum precision
available all the time, 1g / 0.05 oz, however values
below 5g / 0.25 oz are shown as zero while in the
normal operating mode. Values exceeding 5g / 0.25 oz
are rounded to the amount of the nearest commercial
wheel weight.
Press the FINE button to advance to the display
resolution between 5g / 0.25 oz and 1g / 0.05 oz.
4.4.2 OUNCE/GRAMS CONVERSION
When the machine is !rst turned on it is preset to display
the imbalance in ounces.
Press the MODE button to advance to select ounces
or grams.
Select Enter to save selection.
4.4.3 RIM DIAMETER IN MILLIMETERS
The rim diameter is normally displayed in inches,
however if the value in millimeters is desired. Press
the MODE button until “PAX/mm” is NOT illuminated
to display in inches, when lit the unit displays in mm.
4.5 ENTER RIM PARAMETERS
4.5.1 Rim Distance and Diameter (offset)
- Move the rim offset arm to the edge of the rim, touch
the pointer to the rim edge as illustrated in Figure 23a
and hold steady for about a second. The beeper will
sound when the distance and diameter values are cal-
culated and entered. Return the arm to its fully in and
down position on the balancer. Do not allow the mea-
surement arm to “dangle” down in front of the balance.
.
Figure 23a
4.5.2 Measure/Enter rim width (manual)
using rim width calipers.
Measure wheel where corrective clip-on weight would
be applied, Figure 23b. Press the Width entry key,
Figure 23-W, and enter the measured width by pressing
+/- keys until the desired value appears in the display.
.
Figure 23b
W
Figure 23

17
EEWB331B
4.5.3 Manual Parameter Entry
In the event of automatic gauge failure, the parameter
values can be input manually. See manual entry of rim
width in the previous paragraph.
D
W
O
Figure 24a
Figure 24b
Figure 24c
4.5.3.1 Manual Rim Diameter Entry
- Select the Manual Diameter button. Read the rim
diameter marked on the sidewall of the tire (Figure 24a
and 24b). Press the Diameter Button (D) and enter the
measured rim diameter by selecting the +/- keys until
the desired value appears in the display.
4.5.3.2 Manual Distance Entry
- Move the distance gauge arm to touch the inner edge
ofthe wheelwhereweightsaretobe placedandobserve
the reading on the scale of the distance gauge (See
arrow, Fig.24c). Press manual Wheel Offset button (O)
followedby selectingthe +/- keys until value is displayed
in the display window.
NOTE: The parameter arm must be in the Home rest
position when the balancer is powered up. This estab-
lishes the arm starting position.
Figure 25
4.6 Easy Alu FUNCTION
The Easy Alu function automatically recognizes the
desired weight location by placing the SAPE arm in
the correct locations.
Note: Alu Modes 4 and 5 are not operable in the Easy
Alu function. They require manual setting.
4.6.1 Automatic rim dimension reading
and setting and Alu Mode
Preparations:
— Compensation run carried out, if necessary.
— Wheel correctly clamped.
Important: The OK indication and recommendation
for optimization, as well as the optimization procedure
itself, will only be accurate if the rim width is correctly
entered (Manual Input).
Automatic rim distance and diameter reading with
an internal gauge arm
— Move the internal gauge arm into position on the
rim to select the initial weight application position
(internal rim side). Keep it in this position until an
audible signal is heard.
Only for Alu2P and Alu3P (Fig. 25):
— Position and hold the internal gauge in the second
position on the rim to select the application position
on the right side of the rim.
Shortly afterwards the machine emits an audible
signal to indicate that the machine automatically
saves the weight application coordinates.
— Move the gauge to the idle position.
— For Alu2P and Alu3P you can start the spin.
—
For all the other Alu, previously enter the rim Width.
At this point you can change the Alu mode suggested
by the machine, using the “Weight selection button”.
Do this by pressing the key once.

18 EEWB331B
4.7 CORRECTION OF THE IMBALANCE
The following weight types and application methods
are available:
•Clip-on weights: Always apply by hand
• Stick-on weights: Can be applied by hand or using
the SAPE for the Alu 2P, Alu 3P.
A
B
Figure 26
Hand applied weights MUST be applied exactly
perpendicular to the shaft (12 o’clock position). After
Spinning the wheel look at the rotation indicators for
the left plane of the wheel, Figure 26-A. As the correct
WheelAngle Position (WAP) gets closer more indicators
light up. When all the indicators are ON, the WAP
indicator will also light up, Figure 26-B. Follow same
procedure for placing weight in the right plane.
Note: When the correct angle is reached, all the
rotation indicators should be ON. If the
wheel has been pushed too far, only the
indicators of the other half will come ON.
If this happens, the wheel must be slowly
turned in the opposite direction until the
WAP position is reached. The weight
amount to be applied in that plane is
shown on the display.
Figure 27a
Figure 27b
Attaching a stick-on weight.
ALU or STATIC weight modes only: Refer to Figure 27b.
Apply the weight on the rim in the 12 o’clock position,
always by hand.
Attaching a clip-on weight.
Refer to Figure 27a. Clip-on weights must always be
applied in the 12 o’clock position. The lip should rest
on the rim edge. Use the weight pliers to position it. In
STATIC mode only the left hand display is used.

19
EEWB331B
To make the corrections,
—Select an adhesive weight of the indicated size and
adjust it to the wheel radius by bending.
—If necessary, index the wheel precisely into the
correction position for the left plane. When the
correction position is reached, all the rotation
indicators for the left plane light up.
—Press the pedal of the main shaft lock to hold the
wheel in this position.
•Clean the fitting position before attaching the
adhesive weights.
•Fit the balancing weight and firmly press the
adhesive weight onto the rim.
•Fit the second adhesive weight in the same manner.
Note: With STATIC weight modes, always apply
the weight at the rim center line. If not
possible, split the weights evenly and
apply on another surface of the rim
(symmetrical to the rim center line).

20 EEWB331B
Figure 28b
Figure 28a
A
B
CD
5.0 ALU 2P AND 3P WEIGHT MODES BY
GAUGE ARM
In case operator prefere to apply weights with the gauge
arm, we suggest to get in contact with the Technical
Support to set machine for this alternative feature.
The gauge arm is used to determine the desired weight
location. When Alu 2P or Alu 3P is selected, the Easy
Alu LEDs (Figure 28a-C) are lit.
Extend the gauge to the inner position and wait a few
seconds for the placement to register, the placement
LED will flash during this time. See figure 28a-D.
Extend the gauge arm to the outer position and wait
for the signal before to return the arm to home. Lower
the hood to spin the assembly.
Use the gauge arm to position the corrective weights
as indicated by the display. Rotate the wheel until all
position LEDs are lit (Figure 28a-A). If correcting the
left plane, the right amount window will display a series
of dashes while searching for the placement location.
While moving the arm, a beep indicates when the
correct application position has been reached. The
weight amount will then be displayed and flash and
the WAP indicator will lite up (Figure 28a-B). Press the
foot pedal to hold the wheel in this position. Apply the
weight to the correct point on the rim.
NOTE: Clean the area where the weight will be placed
before attaching the adhesive weights. In compliance
with the imbalance detected, approach at the gauge
head the suitable adhesive weight.(1, Figure 28b).
Remove the protective tape (2) from the stick-on weight
and apply it to the correct point on the rim.
Split Weight Mode or sometimes called Spoke Mode
can be invoked if desired. See chapter 6.0.
NOTE: Either left or right plane can be corrected first.
Rotate the wheel to the next position, put the stick-on
weight on the gauge arm and apply the weight for the
remaining position. After applying the balance weights
perform a Check Spin.
It is good practice to perform a check spin after applying
the weights. Spin the wheel. Having finished the Run,
if the wheel is balanced correctly, both the numerical
indicators should indicate 000. To check how much
imbalance is left: Select the FINE key. The operator
should decide if applying additional weight is required.
Results recalculation.After Spinning a wheel it is possible
to enter new rim data or select another weight mode.
The results are recalculated automatically. Selecting
another weight mode such as between NORMAL, ALU
and STATIC no additional steps required either.
1
2