Snap-On EEWH312A User manual


EEWH312A
Air/Electric Tire Changer
FORM ZEEWH312A Rev B
Operation Instructions

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EEWH312A
Air/Electric Tire Changer
Operation Instructions
Print History
First Edition Form ZEEWH312A
COPYRIGHT NOTICE
The information contained in this document is property of Snap-on Incorpo-
rated. It or any of the information contained within shall not be used, copied,
or reproduced without express written consent of Snap-on Incorporated.
TRADEMARK NOTICE
Snap-on is a registered trademark of Snap-on Incorporated.
Snap-on Equipment
309 Exchange Ave.
Conway, AR 72032
Ph: 501-450-1500
Fax: [phone]

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EEWH312A Tire Changer Operation Manual
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SAFETY INFORMATION
For your safety, read this manual thoroughly
before operating the EEWH312A Series Tire Changer
TheEEWH312ASeriesTire Changersareintendedfor use byproperlytrainedautomo-
tive 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 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 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 EEWH312A Series Tire Changers, the operator
has a thorough understanding of the wheels and tires being changed. In addition, it is
assumedhe has athoroughknowledge of theoperationand safety featuresofthe rack,
lift, or floor jack being utilized, and has the proper hand and power tools necessary to
service the vehicle in a safe manner.
Beforeusingthe EEWH312ASeriesTire Changers,alwaysrefertoandfollow 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 !!

EEWH326A Tire Changer Operation Manual
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Overinflated tires or tires mounted on the wrong sized rims can explode produc-
ing hazardous flying debris.
 Read Operator’s Manual before using this Tire Changer.
 Never mount tire on rim with different sized diameter.
 Never exceed maximum inflation pressure listed on tire sidewall.
 Always use safety restraint arm to hold wheel in place while
inflating.
 Always use attached air hose to inflate 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 qualified 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 qualified 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.
SAFETY INSTRUCTIONS
IMPORTANT!! SAVE THESE INSTRUCTIONS

EEWH312A Tire Changer Operation Manual
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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.
Risk of pinching or crushing hands and fingers when mounting and demounting.
 Read and understand the operation instructions before using this
tire changer.
 Keep hands and fingers clear of rim edge during demounting and
mounting process.
 Keep hands and fingers 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 lubricate to prevent tire binding.
Contact with moving parts could cause injury.
Risk of eye injury. Flying debris, dirt, and fluids may be discharged during bead
seating and inflation process.
 Remove any debris from tire tread, wheel surfaces.
 Remove excess tire lubricant before inflating.
 Wear approved safety glasses during mount and demount
procedures.
Debris, dirt, and fluids 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.
IMPORTANT !! SAVE THESE INSTRUCTIONS -- DO NOT DISCARD !!
Warning !
Warning !

EEWH326A Tire Changer Operation Manual
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Tires and Rims that are not the same diameter are mismatched.
 NEVER attempt to mount or inflate 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 flying 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 inflate any Tire and Rim with different
diameters.
 Inspect tires, NEVER inflate tires that are damaged, rotten or worn.
 NEVER inflate ‘Split Rim Wheels’ on this tire changer, remove them and
use only an approved safety inflation cage designed for this purpose.
 Lock turntable Clamp on inside of rim before attempting to inflate 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 inflating 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 inflation 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
inflate tire with air hose supplied with tire changer. NEVER use shop
inflation hose to inflate a tire.
 Tire Changer must be anchored to concrete floor if equipped with a
“Safety Restraint Arm”
Exploding Tires can cause serious injury.

EEWH312A Tire Changer Operation Manual
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TABLE OF CONTENTS
SAFETY STATEMENTS Page 5-8
TABLE OF CONTENTS Page 9
1.0 INTRODUCTION Page 10
1.1 SPECIFICATIONS and FEATURES Page 10
1.2 NOMENCLATURE Page 10
1.3 DIMENSIONS OF THE MACHINE Page 12
1.4 STANDARD ACCESSORIES Page 12
1.5 OPTIONALACCESSORIES Page 13
1.6 GENERAL PRECAUTIONS Page 14
2.0 INSTALLATION Page 14
2.1 ELECTRIC INSTALLATION (AIR-ELECTRIC MODELS) Page 14
2.2 BEAD BREAKER INSTALLATION Page 15
2.3 AIR INSTALLATION Page 15
3.0 CONTROLS Page 16
4.0 MOUNTING AND DEMOUNTING-PRECAUTIONS Page 17
4.1 DEMOUNTING TUBELESS TIRES Page 17
4.2 MOUNTING TUBELESS TIRES Page 20
4.3 INFLATING TUBELESS TIRES Page 21
5.0 DEMOUNTING TUBE TYPE TIRES Page 23
5.1 MOUNTING TUBE TYPE TIRES Page 23
5.2 INFLATING TUBE TYPE TIRES Page 24
6.0 MOUNTING/DEMOUNTING MOTORCYCLE TIRES Page 24
7.0 MAINTENANCE Page 25

EEWH326A Tire Changer Operation Manual
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1.0 INTRODUCTION
Congratulations on purchasing the Snap-on EEWH312A
Series air, or 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 profit and added versatility for your shop, enabling you
to work with aluminum or magnesium alloy wheels without
damagingcustomer’srims. Withaminimumof maintenance
andcare your Snap-onEEWH312ASeriesTireChanger will
provide many years of trouble-free operation.
Pleasereadthismanualthoroughly before operating the unit.
Instructions on use, maintenance and operational require-
ments of the machine are covered in this manual.
1.1 SPECIFICATIONS
Operation temperature range +41/+122 F (+5/50 C)
Air and Air-Electric tire changers for car, light commercial
vehicle and motorcycle tires designed for one-piece rims.
EEWH306A
Weight: EEWH306A 450 lbs (204 kg)
Air pressure required 110-170 psi (8-12 bar)
Bead breaker force 3300 lbs (kN 15)
Max. wheel diameter 40” (mm 1016)
Max. wheel width 12” (305mm)
Rim diameter outside locking 10”-18”(254-457mm)
Rim diameter inside locking 12”-20”(305-508mm)
Motorcycle wheels with adapters 15”-27”(381-584mm)
Motor 110 VAC 60Hz (air/electric models) 1 Hp (kw .75)
EEWH312A Series
Weight: EEWH312A 530 lbs (204 kg)
Air pressure required 110-170 psi (8-12 bar)
Bead breaker force 3400 lbs (kN 15)
Max. wheel diameter 40” (mm 1016)
Max. wheel width 12” (305mm)
Rim diameter outside locking 10”-20”(254-508mm)
Rim diameter inside locking 12”-22”(305-558mm)
Motorcycle wheels with adapters 15”-27”(381-686mm)
Motor 110 VAC 60Hz (air/electric models) 1 Hp (kw .75)
1.2 NOMENCLATURE
Beforeinstalling and usingtheSnap-on EEWH312A Series
Tire Changer it is suggested that you become familiar with
the nomenclature of the machine’s components.
1 Vertical slide
2 Swing arm
3 Swing Arm Adjustment knob
4 Lock lever
5 Mount/demount head
6 Tower or column
7 Turntable
8 Clamping Jaws
9 Bead breaker arm
10 Bead breaker blade
11 Bead breaker pads
12 Foot pedal controls
13 Inflation gauge
14 Bead seater/inflator pedal
15 Inflation jets
16 Safety restraint arm (Standard Models Only)
17 Safety restraint positioning knob
(Standard Models Only)
18 Inflation hose
19 Lube bottle
20 Mount/Demount Tool
21 Safety Restraint Arm Anti-rotation Lock
(Standard Models Only)
912
Figure 1