R980 Series of Tire Changers
39
P/N 5900158 — Rev. F - March 2022
The Steps in Changing a Tire
Before you start working on a Tire, review the requirements in
Changing a Tire consists of multiple steps:
1.
Deflate the Tire
. There is a lot of energy stored in a Tire when it is inflated. You
must
fully
deflate the Tire before you can demount it. If you do not, that energy will be released when you try
to demount it, which could result in the Tire exploding, causing injury and even death to the
Operator or bystanders.
Never work on a Tire unless you have personally confirmed
that it is fully deflated
. The best way to do this is to make sure the Valve Core has been
removed from the Valve Stem.
2.
Break the Bead
. Tires stay in position because the Tire Bead is seated between the Bead
Retainer and the Rim Lip of the Wheel (called the Bead Seat). To demount a Tire, you must get the
Bead out of the Bead Seat all the way around both sides of the Tire. This is called Breaking the
Bead. Use care when Breaking the Bead of Wheels with a TPMS.
3.
Secure the Wheel on the Turntable
. It is important for the Wheel to stay in place on the
Turntable. The Tire Changer supports both Internal and External Clamping.
⚠
WARNING
Do not stand on the Tire Changer Frame, or Turntable while demounting or mounting a
Tire.
4.
Demount the Tire
. Once the Bead is broken, you still have to slide both Beads over the Rim Lip
of the Wheel to get it fully off. Once the Tire is demounted from the Wheel, you can move it out of
the way and then mount the new Tire.
5.
Mount the new Tire
. Mounting a Tire is basically the opposite of demounting. You first need to
get the Beads under the Rim (the opposite of demounting the Tire), get the Beads into position
in
the Bead Seats (the opposite of Breaking the Bead), and then inflate the Tire (the opposite of
deflating the Tire).
6.
Inflate the Tire
. Three separate stages: Bead Seal, Bead Seat, Inflate.
Bead Sealing
is
putting in a small amount of air pressure to push the Tire up against the Rim so that no more air
leaks out.
Bead Seating
is putting in more air pressure to “pop” the Beads into position in the
Bead Seats.
Inflation
is adding air pressure to the Tire manufacturer’s recommended pressure
after the Beads have been seated.
7.
Remove the Wheel from the Turntable
. Disengage the Clamps, then move the Wheel and
Tire off the Turntable and back onto the ground.
Summary of Contents for R980AT-L
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