R745 Swing-Arm Tire Changer
8
P/N 5900171 — Rev. C — Dec. 2019
Frequently Asked Questions
Question
: What does a Tire Changer do?
Answer
:
A Tire Changer takes Tires off of Wheels (called demounting), puts Tires onto Wheels
(called mounting), and inflates Tires.
Q
: What is the difference between a Tire, Wheel, and Rim?
A
: A Wheel is the round
metal
piece that attaches to the Vehicle’s axle. A Tire is the round
rubber
piece that surrounds the Wheel. The outer edge of the Wheel, where the Tire attaches to the
Wheel, is called the Rim. Some people use Wheel and Rim interchangeably.
Q
: What are the steps in the process of demounting a Tire and then mounting a new Tire?
A
: The steps are: Deflate the Tire, break the Bead on both sides of the Tire, secure the Wheel on the
Turntable, demount the Tire, mount the new Tire, inflate the new Tire, then remove the Wheel
from the Turntable.
Q
: What does “break the Bead” mean?
A
: A Tire is held on the Rim of a Wheel by the Tire Bead sitting between the Rim Lip and the Bead
Retainer of the Rim (this location is called the Bead Seat). The air pressure in the Tire holds it in
place once the Bead is seated (during mounting). When you “break the Bead”, you move the Tire
Bead out of Bead Seat, which is required to demount the Tire.
Q
: Can I break the Bead without fully deflating the Tire?
A
: No, do not do this.
Always
fully deflate
a Tire before attempting to break its Bead
. The air
pressure energy in a Tire, even if not fully inflated, can be considerable. If you were to attempt to
break the Bead of a Tire not fully deflated, that air pressure energy would be released all at once,
possibly injuring or, in rare cases, killing the Operator or bystanders.
Q
: What thing should I always do when working with the Tire Changer?
A
: You must identify and correctly match the Tire and Wheel/Rim diameters of the Tires you are
mounting; they must match exactly. If they do not match exactly, this is called a tire mismatch.
The result of a mismatch is that the Tire could literally explode off the Wheel when you inflate it or
while the Vehicle is being driven. In both cases, people could be injured or killed. Note that the
phrase “tire mismatch” is also used to mean Tires on a single vehicle with different tread patterns
or from different manufacturers. This is not what we are talking about here. BendPak Ranger
recommends getting and reading OSHA standard 29 CFR 1910.177 (Servicing Multi-Piece and
Single Piece Rim Wheels) for additional information.
Q
: Where should I put my Tire Changer?
A
: What you want is a flat Concrete floor with room around it that is also near where you work on
Tires. Ideally, you want it a little off the beaten path, as you must – for safety – keep everyone
away from the Tire Changer while it is in use. No one other than the Operator should be within 30
feet of the Tire Changer while it is in use.
Q
: Why is there a 110 VAC plug on the Power Cord; I want to use a 220 VAC power source?
A
: The Tire Changer comes configured from the factory for 110 VAC. However, it is switchable to
220 VAC. Refer to
for complete instructions for switching. Short
version: there’s a switch on the side that needs to be changed and you need to have an
Electrician put a 220 VAC Plug on the end of the Power Cord. Pay careful attention to the
instructions for switching; if done wrong, you can damage the Tire Changer.
Summary of Contents for R745
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Page 67: ...R745 Swing Arm Tire Changer 67 P N 5900171 Rev C Dec 2019 Maintenance Log ...
