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Wheel & Rim Safety Manual
Oversized tires on the vehicle
Demounting rims with or without 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.
Tool Required:
Hydraulic demounting tool.
1
1. Attach the tool frame assembly to the outer
rim flange by slipping the clamping jaws over
the outer edge of the flange.
2
2. Securely tighten adjusting screws at bottom
of jaws. Set hand screw against lock ring and
adjust until jaw assembly is in a right angle
position to the plane of the flange.
3
3. With spade tip down and ram in retracted
position, insert spade and ram assembly
between open sides of frame. Place spade
tip between tire bead and rim flange.
4
4. Lift ram until trunnion engages frame shoulder
and move stop screw into support ram. Apply
pressure to ram and spade by means of pump
until spade has moved tire bead toward center
of rim assembly far enough to permit the
placing of a bead wedge between bead and
flange on each side of the tool.
