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.

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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