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Wheel & Rim Safety Manual
Oversized tires on the vehicle
Demounting rims with pry bar pockets
CAUTION:
Always completely deflate tire by removing valve core before removing the tire from vehicle or
before attempting any other demounting operation. Check the valve stem by carefully running a piece of
wire through the stem to make sure it is not plugged.
See Safety Procedures & Standards for Servicing
Off-Highway Rim Wheels.
1
1. Be sure vehicle is safely raised and wheels
are chocked.
2
2. Remove valve core and deflate tire completely.
Check the valve stem by carefully running a piece
of wire through the stem to make sure it is not
plugged. Stand to the side of the rim.
Remove driver key.
3
3. Place the hook of the hydraulic demounting
tool into one of the pry bar pockets. Adjust
the ram adjusting screw to enable the tool to
be perpendicular to the wheel when under
pressure.
4
4. While applying pressure, always stand to one
side of the tool and hold it with one hand as
shown. Apply pressure and depress the flange
about ¾” (20 mm). If necessary, release the
pressure to readjust the tool. Place the end
of a pry bar between the flange and the lip of
the bead seat band and release the pressure.
Now place the hook of the bead-unseating
tool under the lip of the bead seat band and
continue the procedure around the rim, then
apply pressure until the tire bead is
COMPLETELY unseated.
