Snap-On EEWH329A Operation Instructions Manual

SWING TYPE AIR/ELECTRIC TIRE CHANGER

EEWH329A

OPERATION INSTRUCTIONS

Air-Electric tilt back tower tire changers for car, light commercial vehicle and motor-

cycle tires designed for one-piece rims. Dimensions based on OEM tires and wheels

only. This tire changer is designed for ease of operation, safe handling of rims, relia-

bility and speed.

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Snap-On EEWB329A

UPDATING GUIDE :

Release A January 2017

-

First publication -

Release B March 2018

- Accessories Chart updating -

Release B1 February 2019

- Max. wheel diameter capacity: 42” (Page 8).

Release C October 2019

-

Tool adjustment section: replaced picture 4.1-4

. PCN: 19G0142

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Snap-On EEWH329A

SAFETY INFORMATION

For your safety, read this manual thoroughly

before operating the EEWH329A Tire Changers

The

EEWH329A Tire Changers are intended for use by properly trained

automotive technicians. The safety messages presented in this section and

throughout the manual are reminders to the operator to exercise extreme care

when changing tires with these products.

There are many variations in procedures, techniques, tools, and parts for

changing 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 cannot 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 changed. It

is essential to use proper service methods and change tires 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 EEWH329A Tire Changers, the operator has

a thorough understanding of the wheels and tires being changed. In addition, it

is assumed he has a thorough knowledge of the operation and safety features

of the rack, lift, or ﬂ oor jack being utilized, and has the proper hand and power

tools necessary to service the vehicle in a safe manner.

Before using the EEWH329A Tire Changers, always refer to and follow the

safety messages and service procedures provided by the manufacturers of

the equipment being used and the vehicle being serviced.

IMPORTANT !! SAVE THESE INSTRUCTIONS - DO NOT DISCARD !!

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Snap-On EEWH329A

Overinﬂ ated tires or tires mounted on the wrong sized rims can explode producing

hazardous ﬂ ying debris.

• Read Operator’s Manual before using this Tire Changer.

• Never mount tire on rim with different sized diameter.

• Never exceed maximum inﬂ ation pressure listed on tire sidewall.

• Always use safety restraint arm to hold wheel in place while

inﬂ ating.

• Always use attached air hose to inﬂ ate tires.

Exploding tires can cause death or serious injury.

Risk of electrical shock.

• Do not operate equipment with a damaged power cord or if the

equipment has been dropped or damaged, until it has been

examined by a qualiﬁ ed service person.

• If an extension cord is necessary, a cord with a current rating equal

to or greater than that of the equipment should be used. Cords

rated for less current than the equipment can overheat.

• 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.

• Do not expose the equipment to rain. Do not use on wet surfaces.

• Plug unit into correct power supply.

• Do not remove or bypass grounding pin.

Contact with high voltages can cause death or serious injury.

Risk of electrical shock. High voltages are present within the base unit.

• There are no user serviceable items within the unit.

• Service on the unit must be performed by qualiﬁ ed personnel.

• Do not open any part of the base cabinet.

• Unplug the unit before servicing.

Contact with high voltages can cause death or serious injury.

Risk of crushing. Stand clear of bead breaker arm during operation.

• Read and understand the operation instructions before using this tire changer.

• Become familiar with all controls before proceeding with operation.

• Stand away from the bead breaker arm when in operation.

• Apply air to breaker in bursts if necessary to control arm depth.

• Keep all persons clear of tire changer.

Contact with moving parts could cause injury.

SAFETY INSTRUCTIONS

IMPORTANT!! SAVE THESE INSTRUCTIONS!!

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Snap-On EEWH329A

Risk of pinching or crushing hands and ﬁ ngers when mounting and demounting.

• Read and understand the operation instructions before using this tire changer.

• Keep hands and ﬁ ngers clear of rim edge during demounting and mounting

process.

• Keep hands and ﬁ ngers clear of mount/demount head during opera tion.

• Keep hands and other body parts away from moving surfaces.

• Do not use tools other than those supplied with tire changer.

• Do not bypass any safety features.

• Use proper tire lubricant to prevent tire binding.

Contact with moving parts could cause injury.

Risk of eye injury. Flying debris, dirt, and ﬂ uids may be discharged during bead

seating and inﬂ ation process.

• Remove any debris from tire tread and wheel surfaces.

• Remove excess tire lubricant before inﬂ ating.

• Wear approved safety glasses during mount and demount

procedures.

Debris, dirt, and ﬂ uids can cause serious eye injury.

Risk of injury. Tools may break or slip if improperly used or maintained.

• Read and understand the operation instructions before using this tire changer.

• Use only the mount/demount tire tool supplied with the tire changer.

• Frequently inspect, clean, and lubricate (if recommended) where designated.

• Follow procedures when instructed in this manual.

Tools that break or slip can cause injury.

Collision and dragging hazard:

• Do not rotate the turntable without a wheel.

• Do not approach the ﬂ ange if it is moving.

• Pay attention to the claws when they project from the ﬂ ange.

• Do not place projecting objects on the ﬂ ange.

• Do not place projecting objects close to the ﬂ ange.

Contact with moving parts can cause injuries.

IMPORTANT !! SAVE THESE INSTRUCTIONS — DO NOT DISCARD !!

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Snap-On EEWH329A

Tires and rims that are not the same diameter are mismatched.

• NEVER attempt to mount or inﬂ ate any tire and rim that are mismatched.

• ALWAYS check to see that tire and rim diameters are the same.

A mismatched tire and rim could explode causing death or serious personal injury.

Over-pressurized tires can explode causing ﬂ ying debris.

• Read and understand Operator’s Manual before operating.

• Keep bystanders away from work area.

• ALWAYS wear Safety Goggles.

• ALWAYS check to see that tire and rim diameters are the same.

• NEVER attempt to mount or inﬂ ate any tire and rim with different diameters.

• Inspect tires. NEVER inﬂ ate tires that are damaged, rotten or worn.

• NEVER inﬂ ate ‘Split Rim Wheels’ on this tire changer or remove them and use only

an approved safety inﬂ ation cage designed for this purpose.

• Lock turntable clamp on inside of rim before attempting to inﬂ ate tire.

• Use approved tire bead lubricant before removing or installing tire on rim.

• ALWAYS position the “Safety Restraint Arm” over the wheel to hold it to the

turntable while inﬂ ating if so equipped.

• If a tire explodes on this tire changer, STOP using it until the “Safety Restraint

Arm” has been replaced, which must be done even if no damage is seen.

• NEVER place head or body over a tire during inﬂ ation process.

• Use short bursts of air to seat tire beads. Check tire air pressure

frequently. NEVER exceed tire manufacturer’s pressure limits.

• NEVER attempt to bypass or alter the built-in air pressure limiter. Only inﬂ ate tire

with air hose supplied with tire changer. NEVER use shop inﬂ ation hose to inﬂ ate a

tire.

• Tire Changer must be anchored to concrete ﬂ oor if equipped with a “Safety

Restraint Arm”.

Exploding tires can cause serious injury.

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Snap-On EEWH329A

Table of contents

SAFETY .................................................................................................................Page 3

TABLE OF CONTENTS

......................................................................................... Page 7

1.0 INTRODUCTION ........................................................................................... Page 8

1.1 SPECIFICATIONS ......................................................................................... Page 8

1.1.1 FEATURES .................................................................................................. Page 9

1.2 MACHINE DIMENSIONS .............................................................................. Page 10

1.3 NOMENCLATURE......................................................................................... Page 10

1.4 ACCESSORIES ............................................................................................ Page 11

1.5 GENERAL CAUTIONS .................................................................................. Page 12

2.0 INSTALLATION ............................................................................................. Page 12

2.1 ELECTRIC INSTALLATION ........................................................................... Page 12

2.2 BEAD BREAKER INSTALLATION ................................................................ Page 12

2.3 AIR INSTALLATION ...................................................................................... Page 13

3.0 CONTROLS .................................................................................................. Page 13

3.1 PRESETTING OF CLAMPING JAWS ........................................................... Page 14

4.0 MOUNTING AND DEMOUNTING PRECAUTIONS ...................................... Page 15

4.1 DEMOUNTING TUBELESS TIRES ............................................................... Page 15

4.2 MOUNTING TUBELESS TIRES .................................................................... Page 17

4.3 IF THE TOP TIRE BEAD IS DIFFICULT TO MOUNT ...................................Page 18

4.4 INFLATION OF TUBELESS TIRES ............................................................... Page 19

5.0 DEMOUNTING TUBE TYPE TIRES ............................................................. Page 20

5.1 MOUNTING TUBE TYPE TIRES .................................................................. Page 20

5.2 INFLATING TUBE TYPE TIRES ...................................................................Page 21

5.3 OPERATING THE PNEUMATIC BEAD ASSIST ........................................... Page 21

5.4 MOUNTING AND DEMOUNTING MOTORCYCLE TIRES ........................... Page 22

6.0 MAINTENANCE ............................................................................................ Page 23

7.0 DISPOSING OF THE UNIT ...........................................................................Page 24

7.1 INSTRUCTIONS FOR DISPOSAL

................................................................ Page 24

WARRANTY .................................................................................................. Page 26

--------------------------- EN ---------------------------

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Snap-On EEWH329A

1.0 INTRODUCTION

Congratulations on your purchase of the Snap-on

EEWH

329A air-electric tire changer. This tire changer

is designed for ease of operation, safe handling of rims,

reliability and speed. This combination of features

means more proﬁ t and added versatility for your shop,

enabling you to work with aluminum or magnesium

alloy wheels with reduced risk of damage. With a

minimum of maintenance and care your Snap-on

EEWH329A Tire Changer will provide many years of

trouble-free operation.

Please read this manual thoroughly before operating

the unit. 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

1.1 SPECIFICATIONS

Operation temperature range: +41/+122 F (+5/50 C)

A

ir-

Electric tire changers for car, light commercial

vehicle and motorcycle tires designed for one-piece

rims.

EEWH329A

• Outside clamping rim diameter capacity: 10” to 24”

• Inside clamping rim diameter capacity: 12” to 26”

• Rim Width Maximum: 14”

• Tire Diameter Maximum: 42”

• Bead Breaking Force: 3300 lbs. at 150 psi air supply

• Electric Requirements: 110V, 60Hz, 20 amp

• Shipping Weight: 620 pounds

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Snap-On EEWH329A

1.1.1 TURNTABLE & CABINET FEATURES

EEWH329A

INTEGRATED BEAD SEATING JETS - Air inﬂ

ation jets

are integrated into the turntable clamping jaws to insure full

bead seating force directly into the tire cavity regardless

of tire diameter.

ADJUSTABLE BEAD BREAKER OPENING - Simple two-

position bead breaker pin adjustment allows for readjusting

breaker to ﬁ t larger OD tires.

TWIN CYLINDER CLAMPING POWER - Two 3” clamping

cylinders provide uniform clamping pressure throughout

the stroke (regardless of rim sizes) as well as providing

25% more clamping power than most single clamping

cylinder tire changers. Additionally these two smaller

cylinders reduce the critical turntable to cabinet distance,

reducing the stress on the transmission.

WHEEL CLAMPS

UNIQUE SIX POINTS CONTACT CLAMPS

Provide better gripping capability

regardless from dirt and

moisture.

REDUCED ANGLE CLAMPS

Increases clamping contact area with rim insuring no

slippage.

NYLON INSERT SOFT TOUCH CLAMPS

Single sided nylon insert in the clamping jaws provides

Nonmetal touch in critical customer visible areas.

VALVE CORE/TIRE TOOL STORAGE CABINET

On tire changer storage area for valves, tools, caulk, etc.

INCOMING AIR PRESSURE GAUGE

Ergonomically located air gauge allows easy operator

monitoring of incoming air pressure.

INTEGRATED PRESSURE LIMITER

Integrated safety pressure limiter stops air ﬂ ow once tire

pressure has reached approximately. 55 PSI preventing

accidental tire over-inﬂ ation.

MOUNT/DEMOUNT ARM ASSEMBLY

SURGE TANK IN THE TOWER - Space-saving design

integrates

the air storage surge tank in the tower allowing

for ﬂ ush to wall tire changer installation.

ADJUSTABLE SLIDEWAY - Unique adjustable vertical

mount/demount hex shaft slideway allows for easy

operator adjustment to compensate for any cumulative

wear in the slideway causing mount/demount head

movement.

NON-SCRATCH NYLON INSERT - Integrated into the

mount/demount head is a replaceable scratch resistent

nylon insert protecting against accidental rim contact.

SAFETY RESTRAINT ARM (Optional)

TIRE/RIM ASSEMBLY RESTRAINT - S

afety Restraint Arm

restrains tire and rim assembly to the tire machine during

the inﬂ ation process reducing potential for injury caused

by the unlikely event of catastrophic tire or rim failure.

SIMPLE SWING ARM DESIGN - SRA arm easily swings

to the left when not in use allowing the technician to quickly

and safely perform the inﬂ ation process without disrupting

the tire changing procedure.

GRAVITY LOCK - SRA lock mechanism operates without

any mechanical cam system eliminating the possibility of

system deterioration or mis-adjustment from mechanical

wear.

POSITIONING SAFETY INTERLOCK SWITCH -

Integrated switch insures that SRA arm is centered on the

tire/rim assembly before the inﬂ ation process can begin.

ANTI-ROTATION LOCK - Prevents SRA from rotating

horizontally during inﬂ ation process.

CONSTRUCTION DESIGNED FOR DURABILITY

RUST PROOF VALVES AND CYLINDERS - Cr

itical bead

breaking cylinder is lined with rustproof polyﬁ ber liner for

years of rust free operation. Non-lined cylinders will pit

causing bead breaker power loss.

LIFETIME LUBRICATED POLYMER VALVES - Critical

footvalves fabricated from glass/fiber self-lubricating

material providing years of maintenance free operation.

WATER SEPARATOR AND AUTOMATIC OILER -

Lubricates all air used for machine operation, does not

lubricate air used for tire inﬂ ation, as do some competitive

models.

HIGH TORQUE 1HP MOTOR - (air-electric models)

Industrial strength high torque turntable drive motor

eliminates tire remount stalling on low profile high

performance tires (UL/CSA approved ).

3-YEAR TRANSMISSION WARRANTY - Designed

for extremely heavy use, the critical motor to turntable

transmission linkage carries a full three (3) years

replacement warranty.

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Snap-On EEWH329A

PNEUMATIC BEAD ASSIST ARM

Up/Down Control Switch - Toggle

switch allows single

ﬁ nger operation of all pneumatic PBA functions, with or

without gloves.

Top Bead Roller - Provides easily controlled pneumatic

power to drive upper beads down into the wheel drop

center (while tire is turning) for easy lubrication prior to

dismounting. Also provides pneumatic power assistance

for safely remounting second bead on extremely low proﬁ le

and Run Flat design tires.

Bead Depressor - Provides easily controlled pneumatic

power to depress the tires sidewall during the remount

cycle. This will prevent premature bead seating before the

entire bead has been reinstalled on the wheel. Provides

an added level of safety by keeping the technicians hands

away from the bead area during this potential pinch point

procedure. Additionally the Bead Depressor “follows” the

tire around while turning to guarantee successful remount

ﬁ rst time everytime.

Bottom Bead Roller - Provides easily controlled

pneumatic power to unseat stubborn lower beads which

may have accidentally reseated after the original bead

breaking procedure. Also allows a technician to raise and

hold wider tires up, to assist in safely and easily getting the

second bead up onto the mount/demount head.

Wheel Centering Depressor - Provides downward

pressure on a rim when working to clamp a low proﬁ le

tire/rim combination. Will assist the technician in correctly

seating the rim clamps between the tire and the rim when

clamping from outside in where it is difﬁ cult to depress the

tire sidewall enough to expose the rim edge.

1.3 NOMENCLATURE

Before installing and using the Snap-on EEWH329A

T

ire Changer it is suggested that you become familiar

with the nomenclature of the machine’s components.

Figure 1.2-1

1 Vertical Hex Shaft

2 Swing Arm

3 Rim Diameter Adjustment

4 Mount/Demount Head Lock lever

5 Mount/Demount Head

6 Tower or Column

7 Turntable

8 Clamping Jaws

8a Inﬂ ation Jets

9 Rim Clamps

10 Bead breaker arm

11 Bead breaker blade

12 Bead breaker pads

13 Foot pedal controls

14 Bead seater/inﬂ ator pedal

15 Inﬂ ation gauge

16 Tire tool lever

17

Tool grip Quick Exchange

18 T

ools storage areas

19 Stop button

PNEUMATIC BEAD ASSIST DEVICE (PBA)

20 Tower Raise/Lower Control Lever

21 Top Bead Roller

22 Bead Assist Arm

23 Lower Bead Assist Roller

24 Movable Tower

25 Top Bead Depressor

26 Depressor Shoe

1.2 MACHINE DIMENSIONS

Figure 1.3-1

Dimensions W=

48” x D=67” x H=73” 1/4

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Snap-On EEWH329A

1.4 ACCESSORIES AND CONSUMABLES

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12

Snap-On EEWH329A

1.5 GENERAL CAUTIONS

A. DURING THE USE AND MAINTENANCE OF THE

MACHINE IT IS MANDA

TORY TO COMPLY WITH

ALL LAWS AND REGULATIONS FOR ACCIDENT

PREVENTION.

B. THE ELECTRICAL POWER SOURCE MUST HAVE

A GROUND CABLE AND THE GROUND CABLE OF

THE MACHINE MUST BE CONNECTED TO THE

GROUND CABLE OF THE POWER SOURCE.

C. BEFORE ANY MAINTENANCE OR REPAIRS

ARE ACCOMPLISHED THE MACHINE MUST BE

DISCONNECTED FROM THE AIR AND ELECTRICAL

SUPPLY.

D. NEVER WEAR TIES, CHAINS OR OTHER

LOOSE ARTICLES WHEN USING, MAINTAINING

OR REPAIRING THE MACHINE. LONG HAIR IS

ALSO DANGEROUS AND SHOULD BE KEPT

UNDER A HAT. THE USER MUST WEAR PROPER

SAFETY ATTIRE - GLOVES, SAFETY SHOES AND

GLASSES.

2.0 INSTALLATION

Your new Snap-on EEWH329A T

ire

Changer requires

a simple installation procedure requiring only a few

moments.

Follow these instructions carefully to insure proper

and safe operation.

The Tire Changer is delivered mounted to a wooden

skid. Remove tire changer from its mounts carefully,

taking care to avoid any back strain.

Place Changer where proper operation will be

unobstructed to all sides. Install the machine in a

covered and dry place.

Once placed in the desired location the tire changer

must be bolted to the ﬂ oor using only the rear two

mounting holes. Mounting anchors are provided with

machines.

TIRE CHANGER MUST BE ANCHORED TO

CONCRETE FLOOR.

2.1 ELECTRICAL INSTALLATION

BUILDING ELECTRICAL INSTALLATION MUST BE

MADE BY A LICENSED ELECTRICIAN.

Check that the electrical speciﬁ cations of the power

source are the same as the machine. The machine

uses 110v, 60 hz, grounded single phase 20 amp

source. Electric speciﬁ cations are clearly marked on

a label at the rear of the machine.

FAILURE TO PROVIDE PROPER ELECTRICAL

SUPPLY AND GROUNDING WILL CREATE A

SHOCK HAZARD TO THE OPERATOR.

540

2.2 BEAD BREAKER INSTALLATION

The side mounted Bead Breaker could be shipped from

the factory dismounted for a more compact shipping

package.

A. Cut the plastic tie strap, which secures the Breaker

Arm to the cabinet pivot.

B. Remove the self locking ring nut from the top of the

pivot pin, slip the pin out of the hole.

C. Place the Breaker Arm into position and insert the

pivot pin through the holes from the top.

D. Replace the “C” clip retainer onto the pivot pin.

E. Locate the spring located at the rear of the pivot

mount. Place the free end of the spring onto the “ear”

located on the Breaker Arm just forward of the pivot.

HINT: You may tie a small rope or cord onto the free

end of the spring then run the cord through the hole.

Pull the spring end toward the ear and loop free end

over the ear tab.

13

Snap-On EEWH329A

3.0 CONTROLS

889

Figure 3.0-1

Before operating the machine, take the time to

familiarize yourself with the operation and function of

all the controls.

A Press down and release the ﬁ rst pedal from the left:

the jaws of the turntable will retract. Do it again:

the jaws will expand. If you press the pedal prior

to the end of the stroke and release, the jaws may

be stopped in any position.

B Open the bead breaker arm. Press down and hold

the middle pedal: by doing this you operate the

bead breaker blade and the arm will move towards

the machine. Release the pedal: the bead breaker

blade will retract.

WARNING!

ALWAYS KEEP ARMS AND LEGS AWAY FROM THE

BEAD BREAKER STROKE!!

C Press down the right pedal: the turntable turns

clockwise. Placing your foot under the pedal and

lift, the turntable turns counterclockwise.

D Lower the Lock Lever (3) to unlock the vertical

slide; lift the Lock Lever to lock.

2.3 AIR INSTALLATION

THE AIR INSTALLATION MUST BE MADE ONLY BY

QUALIFIED PERSONNEL.

EXCESSIVE AIR PRESSURE CAN SERIOUSLY

INJURE PERSONNEL AND DAMAGE THE MACHINE.

Ensure that the line pressure is within the limits

required by the machine. If the pressure exceeds

170 psi (12 bar) it is mandatory to install a pressure

regulator before the air inlet of the machine.

If the air pressure is lower than the minimum required of

110 psi (8 bar) the clamping power of the turntable and

the bead breaker power may be insufﬁ cient for certain

tires and substantially reduces tire changer performance.

It is suggested that the shop air supply be equipped

with a water separator/dryer type modiﬁ cation for

maximum performance.

After ensuring all the above proceed as follows:

A. Connect the machine to the air supply with a rubber

hose (rated for the pressure) with an internal diameter

of no less than 1/2” (12.5mm).

WARNING! BEFORE CONNECTING THE MACHINE

TO THE AIR SUPPLY BE SURE ALL PERSONNEL

ARE CLEAR OF THE MACHINE AND NO ITEMS

ARE LEFT ON THE TURNTABLE.

B.

It is strongly recommended that an air valve shut-off be

installed between the shop air supply and the tire changer

for routine maintenance and in case of an emergency.

C. Should you install any optional accessories, please

refer to the relevant instructions.

D.

Ensure the functional ability of the air lubricator by

ensuring that the glass sight bowl is ﬁ lled with air lubricant.

14

Snap-On EEWH329A

3.1 PRESETTING OF CLAMPING JAWS

MAKE SURE ALL FOUR CLAMPING JAWS ARE

POSITIONED IDENTICALLY (FIG. 3.1-1, ITEMS

1 OR 2). OTHERWISE THE RIM MIGHT NOT BE

CLAMPED PROPERLY, COME OFF THE CHUCK

AND HURT THE OPERATOR!

A

Depress ﬁ rst pedal from the left smoothly up to the

centre position. If the pedal is released the clamping

jaws stop in the position they have reached at the time.

B Set the clamping diameter according to the

dimensions of the rim.

Rim diameters are shown in inches on the turntable

(A, Fig. 3.1-1). The setting diameter (scale on the jaw

-B- corresponding to the scale on the turntable -A-)

depends on the position of the jaws (1, or 2, Fig. 3.1-1).

1115

Fig. 3.1-1

C

To reposition the jaws free the lock pin by applying

pressure on the lever (C) on the right side of each

jaw. Slide the jaws towards the required position and

release the lever: make sure the jaw is now locked

ﬁ rmly. Repeat the procedure on all the turntable jaws.

With the jaws in position 1 (1, Fig. 3.1-1), the operative

diameter is exactly as indicated by the scale (A-B) on

the turntable.

With the jaws in position 2 (2, Fig. 3.1-1), add 4” to the

value represented by the scales to obtain the effective

setting diameter.

D Position wheel and press it down by hand on the

turntable.

E Depress pedal through the ﬁ rst position and release.

The wheel is clamped.

E Turn Swing Arm Adjustment Knob (4) for

positioning mount/demount head slightly away

from rim diameter.

F Lift upward on the restraint-positioning knob (2) to

position over tire/wheel assembly for inﬂ ation, at

the same time push down on the Anti-rotation Lock

Arm to release lock. (1) You may now swing the

safety restraint arm to position on the center of the

wheel. Lower the restraint until the rubber pad on

the restraint disc is resting on the rim center. The

SRA is a gravity lock that will automatically lock if

any force other than the restraint position knob is

lifted. You are now ready for the inﬂ ation process.

NOTE: the turntable inﬂ ation will not function until the

safety arm is centered over the turntable.

G Press bead-seater pedal on left side of the machine

(5, Fig. 3.0-1 / 1, Fig. 3.0-2) halfway down: This

will allow activate the tire inﬂ ation line.

Figure 3.0-2

H Press bead-seater pedal (1, Fig. 3.0-2) swiftly all

the way down to get air blast from the inﬂ ator jets

in the clamping jaws. Air simultaneously comes

out of inﬂ ator hose.

WARNING!!

WHEN OPERATING THE BEAD SEATER IT IS

MANDATORY TO WEAR SAFETY GLASSES TO

PROTECT EYES.

15

Snap-On EEWH329A

4.1 DEMOUNTING TUBELESS TIRES

A. Remove all wheel-weights from the rim. Remove

the valve stem

or valve stem core and deﬂ ate the tire

(Fig. 4.1-1).

535a

Fig. 4.1-1

B. Break both beads.

Hold open the Bead Breaker, roll the tire/rim into the

Breaker area (Fig. 4.1-2). Ensure that the tire/rim

assembly is ﬂ at against the rubber breaker pads on the

side of the machine. Make certain that the bead breaker

blade is not over the top of any portion of the rim. Now

activate the bead breaker pedal. As soon as the bead

dislodges from the rim, release the breaker foot pedal.

It may be necessary to rotate the tire 90 degrees and

repeat the above procedure to dislodge all beads.

Pay extra attention during this operation, as it is easy to

mistakenly keep your foot on the bead-breaking pedal

too long. This could potentially result in bead or rim

damage (Fig. 4.1-2)

536

Fig. 4.1-2

NOTICE !

ON RUN FLAT TIRES WITH THE OPTIONAL LOW

PRESSURE SENSOR INSTALLED, BREAK THE

BEAD AT 90 DEGREES OFFSET FROM THE VALVE

STEM. DAMAGE TO THE WHEEL AND/OR SENSOR

MAY RESULT IF THE BEAD IS BROKEN AT ANY

OTHER POINT ON THE RIM.

4 . 0 M O U N T I N G A N D

DEMOUNTING PRECAUTIONS

IMPORTANT! BEFORE MOUNTING A TIRE ON A

RIM, PAY ATTENTION TO THE FOLLOWING:

A. THE RIM MUST BE CLEAN AND IN GOOD

CONDITION: IF NECESSARY CLEAN IT AFTER

REMOVING ALL WHEEL-WEIGHTS INCLUDING

‘TAPE WEIGHTS’ INSIDE THE RIM.

B. THE TIRE MUST BE CLEAN AND DRY, WITHOUT

ANY DAMAGE TO THE BEAD.

C. REPLACE THE RUBBER VALVE STEM WITH

A NEW ONE OR REPLACE THE ‘O’ RING IF THE

VALVE STEM IS MADE OF METAL.

D. IF THE TIRE REQUIRES A TUBE, MAKE SURE

THE TUBE IS DRY AND IN GOOD CONDITION.

E. LUBRICATION IS NECESSARY TO MOUNT

THE TIRE CORRECTLY AND GET A PROPER

CENTERING. BE SURE YOU ARE USING APPROVED

LUBRICANT ONLY.

F. MAKE SURE THE TIRE IS THE CORRECT SIZE

FOR THE RIM.

16

Snap-On EEWH329A

Angular tool adjustment (Fig. 4.1-4a)

The tool is adjusted at the factory with an optimal an-

gle for most wheels used today. However, the angle

can be optimised for wheels with a diameter that

differs considerably from the standard.

T

o adjust the tool angle, proceed as follows:

1 Mount the rim for which the adjustment is required.

2 Loosen the lower screw (1).

3 Adjust the tool with the screws shown (2a and

2b). Unscrew the screw 2a or 2b to rotate the tool,

respectively clockwise or counterclockwise.

4 Screw in the opposite screw to block the tool in the

desired angular position.

5 Tighten the lower screw (1) with a torque of 35 Nm.

Ø 17"

1/25" (1 mm)

2/3" (17 mm)

Ø 20"

Fig. 4.1-4a

NOTE:

YOUR MACHINE IS SHIPPED WITH SEVERAL

REPLACEMENT PLASTIC INSERTS (INSIDE STANDARD

EQUIPMENT PACK). THE PLASTIC INSERTS WILL

HELP AVOID DAMAGE FROM ACCIDENTAL CONTACT

BETWEEN THE MOUNT/DEMOUNT HEAD AND THE

RIM. THE PLASTIC INSERTS WILL NEED TO BE

PERIODICALLY REPLACED.

MAINTENANCE NOTE:

IF THE MOUNT/DEMOUNT HEAD NYLON INSERTS

ARE WEARING OUT PREMATURELY, THE CAUSE

IS THE OPERATOR’S FAILURE TO CORRECTLY

SET THE RIM DIAMETER ADJUSTMENT KNOB,

CAUSING THE INSERT TO INCORRECTLY

CONTACT THE RIM.

NOTE: ONCE THE MOUNT/DEMOUNT HEAD IS

POSITIONED PROPERLY, IDENTICAL WHEELS

MAY BE CHANGED WITHOUT HAVING TO RESET

THE HEAD.

F. Insert the mount/demount tool between the bead

and the mount/demount head. Pry the bead onto the

mount/demount head using the mount/demount head

C. Set the rim clamps to the proper position: retract

clamps to clamp the wheel from the outside and expand

clamps to clamp from the inside.

When clamping small wheels (14” or smaller) from

the outside, set the clamps at a diameter nearly equal

to the rim diameter before placing the wheel on the

clamps. This will help avoid the possibility of pinching

the tire as the clamps retract.

NOTICE !

TO MINIMIZE THE RISK OF SCRATCHING ALLOY

OR CLEAR COATED RIMS, THESE RIMS SHOULD

BE CLAMPED FROM THE OUTSIDE.ô:

D. Liberally lubricate both beads. Place the wheel

WITH DROP CENTER UP (Fig. 4.1-3a) on the

turntable, and clamp in position. It may be necessary to

hold the tire and wheel down while clamping to insure

contact between rim and clamp as shown in 4.1-3a.

331

Fig. 4.1-3 Fig. 4.1-3a

E. Gently position the mount/demount head in contact

with rim edge, now manually push the lock lever up

and lock it into place. The mount/demount head

automatically moves vertically up and away from

the rim edge. Turn the swing arm adjustment knob

clockwise until the mount/demount head moves

horizontally away from the rim ﬂ ange by approximately

1/16” (2mm): this is necessary to avoid any rim contact

during the changing process. (Fig. 4.1-4).

332a

Fig. 4.1-4

17

Snap-On EEWH329A

4.2 MOUNTING TUBELESS TIRES

A. Clean entire rim surface (Fig. 4.2-1).

336

Fig. 4.2-1

Liberally lubricate both beads of the tire with approved

tire lubricant (Fig. 4.2-2).

337

Fig. 4.2-2

NOTICE!

THESE LUBRICATION OPERATIONS ARE

NECESSARY TO MOUNT THE TIRE CORRECTLY

AND GET A PROPER ASSEMBLAGE ON THE

RIM. BE SURE YOU ARE USING APPROVED

LUBRICANT ONLY.

441

DANGER!!

Keep hands and ﬁ ngers clear of mount/demount

head during operation.

as the leverage point. To make this operation easier,

insure that the bead of the tire, 180º across from the

mount/demount head, is in the drop center of the wheel.

Push the tire into the drop center with your hand or

bead depressor tool if necessary.

It is suggested that the mount/demount tool be

removed after lifting the bead onto the mount/demount

head (Fig. 4.1-5), however, you may remove the tool

after the bead has been removed.

333

Fig. 4.1-5

G. Rotate the turntable clockwise (pedal down) and, at

the same time, push down on the tire sidewall to move

the bead into the drop center of the rim (Fig. 4.1-6).

334

Fig. 4.1-6

H. Repeat the process for removing the lower bead.

This time, lift the bead opposite to the mount/demount

head to keep it in the drop center (Fig. 4.1-7).

I. Pivot the swing arm to the right and remove the tire.

335

Fig. 4.1-7

18

Snap-On EEWH329A

4.3 IF THE TOP TIRE BEAD IS

DIFFICULT TO MOUNT

Follow these instructions using the Bead Holding

Clamp (Fig. 4.2-4).

• After installing the bottom bead, inserts the

tire tool to the left of the bead head as shown

(Fig. 4.3-1). To protect decorative rims use

protective sleeve #EAA0247G04A (S).

Fig. 4.3-1

• Step on the foot pedal to rotate the turntable

clockwise until the tire lever is tight against the bead

head.

• Using your right hand push and hold the tire bead

opposite the bead head into the rim drop centre.

• Position the bead clamp #EAA0247G70A to hold

the tire bead into the rim drop centre (Fig. 4.2-4).

• As the turntable is turning use the tire tool in your

left hand to raise and guide the tire bead onto the

bead head (Fig. 4.3-2).

Fig. 4.3-2

• Continue to rotate the turntable until the top bead

is mounted.

Do not remove the tire tool or bead clamp until the foot

pedal is released.

NOTICE!

SOME TIRES HAVE A COLOR DOT THAT IS TO

BE KEPT ON THE OUTSIDE OF THE WHEEL AND

IS TO BE ALIGNED WITH THE VALVE STEM. IF

THIS IS THE CASE BE SURE TO ATTAIN PROPER

ALIGNMENT PRIOR TO TIRE INFLATION.

B. Lock the rim to the turntable and rotate it so that

the valve is at the 2 o’clock position. Place the tire

to be mounted on the rim. Swing the mount/demount

arm in so that the mount/demount head is in the

working position. (Fig. 4.2-3) Position the lower bead

on top of the mount/demount head and UNDER the

mounting ﬁ nger of the mount/demount head (Fig. 4.2-

3). Turn the wheel clockwise (right pedal down) while

simultaneously pushing the tire down into the drop

center, opposite to the mount/demount head.

338

Fig. 4.2-3

C. Mount the upper bead following the directions

in section B. With low proﬁ le tires the bead holding

clamp (option EAA0247G70A Fig. 4.2-4) can help to

prevent the top bead from prematurely seating during

the mounting cycle.

NOTE: Bead Holding Clamp must be removed prior to

coming full circle and impacting the mount/demount head.

896

Fig. 4.2-4

19

Snap-On EEWH329A

C. Lift the tire with both hands so that the upper bead

is sealed to the rim edge (Fig. 4.4-1).

NEVER STAND OVER TIRE WHEN ATTEMPTING

TO SEAT BEADS OR DURING INFLATION

340a

Fig. 4.4-1

D. Press the inﬂ ation pedal down swiftly to the end of its

travel to activate the bead seater jets. (Fig. 4.4-1 item 1).

The top bead is already seated by the lifting motion.

Therefore, the air from the bead seater jets will enter

the tire impacting on the top sidewall and rebound into

the bottom sidewall driving it into place and seating the

bead, creating an air seal.

WHEN OPERATING THE BEAD SEATER, ALWAYS

WEAR SAFETY GLASSES TO AVOID INJURY TO EYES.

E. Install valve core, if removed. Complete inﬂ ation to

manufacturer’s suggested pressure. Never exceed

pressure listed on tire sidewall.

4.4 INFLATION OF TUBELESS TIRES

Make sure that both beads are properly lubricated.

BEAD SEATING IS THE MOST DANGEROUS PART

OF MOUNTING A TIRE.

NEVER STAND OVER TIRE WHEN ATTEMPTING

TO SEAT BEADS OR DURING INFLATION

IT IS POSSIBLE TO INCORRECTLY MOUNT TIRES

THAT ARE 1/2” SMALLER IN DIAMETER THAN

THE RIM THAT THEY ARE MOUNTED ON. WHILE

THESE BEADS WILL SEAL, IT IS IMPOSSIBLE TO

GET THEM TO SEAT IN THEIR PROPER POSITION.

EXPLOSION OF A TIRE MAY CAUSE SEVERE

INJURY

SAFETY RESTRAINT ARM (OPTIONAL) MUST BE

IN PLACE PRIOR TO ATTEMPTING BEAD SEATING

OR INFLATION.

NEVER EXCEED THE MAXIMUM PRESSURE

ALLOWED BY THE TIRE MANUFACTURER.

IF YOU CLAMPED THE RIM FROM THE OUTSIDE

IT MUST BE UNCLAMPED WHEN INFLATING BUT

ONLY AFTER THE SRA IS IN PLACE.

THE OPERATOR MUST STAND CLEAR FROM THE

WHEEL WHEN INFLATING, AND PRESSURE MUST

BE MONITORED FREQUENTLY TO AVOID OVER

INFLATION.

BEFORE INFLATING A TIRE, CHECK THE

CONDITION OF THE TIRE AND THE RIM.

In fl at e ti r e a cc ord in g t o ma nu fa c tur er ’s

recommendations.

Due to unusual conﬁ gurations or the stacking of tires

the inﬂ ation process may be difﬁ cult. To assist with

this problem the Tire Changers are equipped with bead

seater jets integrated into the tabletop.

To utilize the bead seater proceed as follows:

A. Position the safety restraint arm (optional) over

center of wheel assembly. The safety arm is lifted

upward by grasping the safety restraint position knob

and lifting upward while simultaneously depressing

the anti-rotation lock arm. Swing SRA arm assembly

so the rubber retainer is centered over the rim. Note

that air pressure to the inﬂ ation hose will not ﬂ ow until

the arm is centered over the rim.

B. Connect the inﬂ ation hose to the valve stem.

20

Snap-On EEWH329A

C. Inﬂ ate the tube slightly: if held with the index ﬁ nger

it should bend a little (Fig. 5.1-2).

342

Fig. 5.1-2

D. Mount the ﬁ rst bead as described in section 4.2,

point B. Put the tube inside the tire and connect the

inﬂ ation air line to the tube valve to hold the tube in

place. (Fig. 5.1-3). Mount the top bead following the

directions above.

Fig. 5.1-3 343

5.0 DEMOUNTING TUBE-TYPE

TIRES

A. For breaking the bead operate as described for the

tubeless tires in section 4.1, point A to F

.

In this case the valve is part of the tube.

NOTICE!

BE CAREFUL NOT TO DAMAGE THE TUBE

DURING THE BEAD-BREAKING OPERATION. THE

VALVE SHOULD BE OPPOSITE TO THE BLADE OF

THE BEAD BREAKER.

B. To demount the ﬁ rst bead, place the valve at 2

o’clock position.

NOTICE!

BE CAREFUL NOT TO CATCH THE TUBE WITH

THE MOUNT/DEMOUNT TOOL, WHEN LIFTING THE

BEAD ON THE MOUNTING FINGER.

After demounting the ﬁ rst bead carefully, remove the

tube before demounting the second bead, as described

in section 4.1.

5.1 MOUNTING TUBE-TYPE TIRES

A.

Perform steps described in section 4.2.A. DO NOT

lubricate

the tube. Talc can be used to assist with tire

positioning if necessary.

B. Conﬁ rm that the tube is the correct size for the tire

to be mounted. (Fig. 5.1-1).

341

Fig. 5.1-1

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Snap-On EEWH329A Operation Instructions Manual

Snap-On EEWH329A Operation Instructions Manual

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