R80EX Tire Changer
42
P/N 5900087 — Rev. B — Jan. 2020
About Valve Stems
The following drawing shows a Valve Stem and its components.
This manual talks about Valve Cores and Valve Stems at multiple points:
•
When demounting a Tire
. Taking out the Valve Core lets the air out of the Tire, which
must
be done before you can demount a Tire.
It is very dangerous to do any service on a Tire if there is air in it.
There is a tool called a Valve Core Tool that makes it easy to remove a Valve Core.
•
When replacing the entire Valve
Stem
. Valve Stems are normally replaced when you mount
a
new
Tire on a Wheel.
When mounting a new Tire, BendPak Ranger recommends installing a new Valve Stem, but it is
not required. The process for replacing a Valve Stem is to cut out or pull out the old Valve Stem,
then install the new Valve Stem. This should be done after the old Tire has been demounted but
before the new Tire is mounted.
There is a tool called a Valve Stem Installer/Remover Tool (sometimes Valve Stem Puller/Remover
Tool) that can be used to both remove an old Valve Stem and install a new Valve Stem.
This tool is
not
the same tool as the Valve Core Tool.
•
When inflating a Tire
. Before starting the first stage of inflating a Tire (sealing the Beads),
remove the Valve Core.
Make sure to keep it
. Removing the Valve Core allows air to move
more easily into the Tire.
Once the
second
stage of inflating a Tire (seating the Beads) is complete, put the Valve Core back
in. Sealing and seating the Beads do not put too much air pressure into the Tires. Inflating the Tire,
the third stage, does. So you want the Valve Core in for the inflation stage, as that will keep the air
from coming back out of the Tire.
