Snap-On EEWB304B User manual

EEWB304B
COMPUTER WHEEL BALANCER
FOR:
PASSENGER CAR & LIGHT TRUCK WHEELS
OPERATION INSTRUCTIONS
Form ZEEWB304B
®®
®®
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SAFETY INFORMATION
For your safety, read this manual thoroughly
before operating the EEWB304B Wheel Balancer
The Model EEWB304BWheel Balancer isintended foruse by properlytrained automo-
tive technicians. The safety messages presented in this section and throughout the
manual are reminders to the operator to exercise extreme caution when servicing tires
with these products.
There are many variations in procedures, techniques, tools, and parts for balancing
tires, as well as the skill of the individual doing the work. Because of the vast number
of wheel and tire applications and potential uses of the product, the manufacturer can-
not possibly anticipate or provide advice or safety messages to cover every situation.
It is the automotive technician's responsibility to be knowledgeable of the wheels and
tires being serviced. It is essential to use proper service methods in an appropriate and
acceptable manner that does not endanger your safety, the safety of others in the work
area or the equipment or vehicle being serviced.
It is assumed that, prior to using the Model EEWB304B Wheel Balancer, the operator
has a thorough understanding of the wheels and tires being serviced. In addition, it is
assumed he has a thorough knowledge of the operation and safety features of the
rack, lift, or floor jack being utilized, and has the proper hand and power tools neces-
sary to service the vehicle in a safe manner.
Before using the Model EEWB304B Wheel Balancer, always refer to and follow the
safety messages and service procedures provided by the manufacturers of the equip-
ment being used and the vehicle being serviced.
IMPORTANT !! SAVE THESE INSTRUCTIONS -- DO NOT DISCARD !!
WARNING
· Wheel balancers can cause flying particles
Wear safety glasses. (user and bystanders)
Flying material can cause injury.
WARNING
·Moving components.
Keep self and tools clear of moving parts.
Moving components can cause injury.

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IMPORTANT SAFETY INSTRUCTIONS
When using this equipment, basic safety precautions should always be followed,
including the following:
1. Read all instructions.
2. Donotoperateequipmentwithadamagedpowercordoriftheequipmenthasbeen
damaged - until it has been examined by a qualified authorized service technician.
3. Always unplug equipment from electrical outlet when not in use. Never use the
cord to pull the plug from the outlet. Grasp plug and pull to disconnect.
4. To reduce the risk of fire, do not operate equipment in the vicinity of open
containers of flammable liquids (gasoline).
5. Keephair,loosefittingclothing,fingersandallpartsofthebodyawayfrommoving
parts.
6. Adequate ventilation should be provided when working on operating internal
combustion engines.
7. To reduce the risk of electric shock, do not use on wet surfaces or expose to rain.
8. Do not hammer on or hit any part of the control panel with weight pliers.
9. Do not allow unauthorized personnel to operate the equipment.
10. Do not disable the hood safety interlock system or bypass the intended operation.
11. Use only as described in this manual. Use only manufacturer’s recommended
attachments.
12. Always securely tighten the wing nut before spinning the shaft.
13. ALWAYS WEAR SAFETY GLASSES. Everyday eyeglasses only have impact
resistant lenses, they are NOT safety glasses.
14. Balancer is for indoor use only.
SAVE THESE INSTRUCTIONS

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Snap-onEEWB304B OperatorsManual
TABLE OF CONTENTS
General Safety Instructions Page 2
1.0 Introduction Page 4
1.1 Safety Notice Page 4
1.2 Balancer Application Page 4
1.3 Specifications Page 5
1.4 Balancer Features Page 5
1.5 Standard Accessories Page 6
1.6 Optional Accessories Page 6
1.7 Dimensions Of The Machine Page 7
1.8 Installation Area Page 7
1.9 Installation Instructions Page 7
2.0 Balancer Assembly Page 7
2.1 Shaft Adapter Installation Page 7
2.2 Wheel Guard Installation Page 8
2.3 Electrical Installation Page 8
3.0 Terminology Page 9
4.0 Balancer Operation Page 10
4.1 Inspection Check list Page 10
4.2 Wheel Mounting Page 10
4.2.1 Mounting of Standard Wheels Page 10
4.2.2 Mounting of Light Truck Wheels Page 11
4.3 Mode Selection Page 11
4.3.1 Weight Placement Modes Page 11
4.4 Selecting Operator Preferences Page 12
4.4.1 FineBalance Mode Page 12
4.4.2 Ounce /Grams Conversion Page 12
4.4.3 Inch/MillimeterConversion Page 12
4.4.4 OperatorA/B Selection Page 12
4.5 Entering Rim Parameters Page 13
4.5.1 Distance and Diameter Entry Page 13
4.5.2 Rim Width Entry Page 13
4.5.3 Manual Parameter Entry Page 13
4.6 Correcting the Imbalance Page 14
4.7 Verifying Results Page 14
4.8 Vibration Problems Page 14
5.0 Matching Program Page 15
6.0 Optimization Program Page 17
7.0 Alu-S Program Page 18
8.0 SpokeMode Page 19
9.0 Split Weight Mode Page 20
10.0 UserCalibration Page 21
11.0 Calibration of the SAPE Page 22
11.0 Explanation of “P” Codes Page 23
12.0 Maintenance Page 23
13.0 TroubleShooting Page 22

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1.0 INTRODUCTION
Congratulations on purchasing the EEWB304B computer wheel balancer. This wheel balancer is de-
signed 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
TheSnap-onwheelbalancermodelEEWB304B isintendedtobeusedasadevicetobalancecar, and
light truck wheels within the following range:
Maximum wheel diameter : 44” (1117mm)
Maximum wheel width : 16” (530mm)
Maximumwheelweight : 130lbs (58.5 kg)
This device is to be only used in the application for which it is specifically designed.
Any other use shall be considered as improper and thus not reasonable.
The manufacturer shall not be considered liable for possible damages caused by improper, wrong or
non reasonable use.

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Snap-onEEWB304B OperatorsManual
1.3 EEWB304B SPECIFICATIONS
Computerized digital wheel balancer for car, light truck
wheels.
Weight Imbalance Accuracy .10 oz / 2 grams
Weight Placement Resolution ± .7 degrees
Weight Imbalance Resolution:
Roundoff Mode .25 oz / 5 grams
Non-Roundoff Mode .05 oz / 1 gram
Max. Shaft Weight Capacity 133 lbs / 60 kg
Max.Tire Diameter 44" / 1117 mm
Rim Width Capacity 3.0"-25" / 76 mm - 508 mm
Max. Tire Width 20” / 508 mm
Rim Diameter Capacity 8"-25" / 152 mm-635 mm
Balancing Cycle Time. 7 seconds or less
Shaft Speed at calculation <100 RPM
Electrical 115V, 1ph, 50-60Hz, 15A
Required Work Area 62” x 64.5” (1575 x1638
mm)
Shipping Weight, complete 325 lbs/147kg
ShippingDimensions 52.75”h 41.5”w 37”d
Machine Dimensions 39”h 39”w 22”d
Actual Weight with Accessories 251 lbs / 113 kg
Operating Temperature Range 32-122F / 0-50C
1.4 FEATURES
ACCURACY
• Weight placement accuracy to as low as ± .7°
• Weight imbalance accuracy to 2 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/diameter entry. Simply touch the
distancearm to the wheel, the distance anddiameter
parameters are automatically entered.
• Quickclamp speednut reduces wheelmounting time.
• Capturedback spring eliminateshavingto handle the
backing spring.
• Quick cycle time.
• Automatic recalculation if weight positions are
changed. No need for re-spinning the wheel.
• Common40 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.
• MatchBalance program forreducing weight required.
• Built-in spin counter for monitoring balancer
productivity.
• Service code access to all Balancer electronic func-
tions for fast, easy diagnosis.
• Operator selectable roundoff mode.
• 5 Aluminum Modes
• Alu-S mode
• Hidden Weight (Spoke) mode
• Split weight mode

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1.5 STANDARD ACCESSORIES
Centering Cones and Accessories
For centering of wheels with center holes
1 EAM0003J08A Cone,85-132 mm /3.36”-5.2”
2 EAM0003J07A Cone, 71-91mm/2.8”-3.6”
3 EAM0003J06A Cone, 56-84mm/ 2.18”-3.3”
4 EAM0003J05A Cone, 43-64 mm / 1.7” - 2.5”
5 EAM0058D07A Cup- Pressure
6 EAC0058D15A RubberRing Protector
7 EAA0263G66A Quick Nut
7A EAC0058D08A Disk - Small Pressure
8 EAM0005D40A Weight- Calibration
9 EAM0021D90A 40 mm Stub Shaft
10 EAA0247G21A Caliper - Rim Width
11 EAC0060G02A Flange -Cover,Hook
12 EAM0006G01A Pin - Accessory
* EAM0005D34A FasteningRod for shaft
* notshown
Figure 1
Figure 2
1.6 OPTIONAL ACCESSORIES
Weight Pliers P/N WWPR13A (Figure3).
Versatile weight hammer/plier. In addition to ham-
mering on weight and used weight removal, the
WWPR13A canbe used to reshape worn weight clips
and trim weight to size.
PRE-INSTALLATION CONSIDERATIONS
Figure 3

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Snap-onEEWB304B OperatorsManual
1.7 DIMENSIONS OF THE MACHINE
Figure 4 - Footprint dimensions.
1.8 REQUIRED INSTALLATION AREA
Makesure that from the operatingpositionthe 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 cre-
ate potential hazards.
Themachineshould 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.
Theinstallationof the machine requires a working area
of at least 62” x 64.5” (1575 x 1638 mm) (Figure5).
Figure5- Recommended workarea
1.9 INSTALLATION INSTRUCTIONS
CAUTION! CAREFULLY REMOVE THE BALANCER
FROM THE PALLET.
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 IN-
JURY OR EQUIPMENT DAMAGE.
2.0 BALANCER ASSEMBLY
2.1 MOUNTING THE SHAFT ADAPTER
A. Mount the threaded shaft onto the arbor of the bal-
ancer. Tighten firmly using the supplied wrench. (Fig-
ure 6).
IMPORTANT! - CHECK THAT THE SURFACES ARE
PERFECTLY CLEAN AND NOT DAMAGED. AN IN-
CORRECT MOUNTING MAY RESULT IN SIGNIFI-
CANTIMBALANCE.
Figure 6

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B. Remove the hardware that secures the machine to
thepallet andslide the balanceronto thefloorwhere itis
to be installed.
C. Install the accessory pins (Figure 7).Tighten firmly.
Figure 7
D. Place cones and other accessories onto the acces-
sory pins.
2.2 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
(1) 3/8” - 16 x 2” HHCS
(1) 3/8” x 16 Keps
Position the hood guard in the raised (up) position.
Slide the hood guard support tube over the frame pivot
shaftprotruding from the rightsideof the balancer cabi-
net.
Line up the mounting holes in both the pivot shaft and
theguardsupporttube. Securethe guardwith 3/8”hard-
ware.
Figure 8
2.3 ELECTRIC INSTALLATION
ANY ELECTRICAL WIRING MUST BE PER-
FORMED BY LICENSED PERSONNEL.
ALL SERVICE MUST BE PERFORMED BY AN
AUTHORIZED SERVICE TECHNICIAN.
Check on the plate of the machine that the electrical
specifications of the power source are the same as the
machine. The machine uses 115VAC, 50-60Hz, 1Ph,
8.0 Ampere. 230VAC units are available if required.
NOTE:
Any electrical outlet installation must be verified
by a licensed electrician before connecting the bal-
ancer.
NOTE:
This machine performs a self-test routine on start-
up. There will be a delay of several seconds before
the display is activated.