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INTRODUCTION TOWHEEL REMOVAL
1, 3 and 5 pieces
In the case of earthmovers, for punctures or
tyre changing, in most cases, the wheels are not
removed. The tyres are removed directly from
the rims. There are different rim types, that often
take a long time to remove, and are very heavy
and difficult to handle.
WHEEL TYPES:
There are three main types of wheel:
• Single-piece hollow based wheels
• Three-piece wheels
• Five-piece wheels
SAFETY PRECAUTIONS
FOR ALL TYPES
OF ASSEMBLY
• Operators must wear protective clothes:
helmet, glasses, gloves, safety shoes,
ear muffs.
• The vehicle's engine must be turned off.
Make sure the locking rod is in position
(hinged vehicles).
• Choose the appropriate lifting material
considering the type and weight of the vehicle.
Always fix the lifted vehicle with a prop.
Always chock a lifted vehicle.
• Maintenance of metal parts should not be
done manually.
• Work in pairs and with lifting equipment to
guarantee safety.
• Tyres must always be entirely deflated
before any operation.
In the case of working on twin wheels,
both tyres must be deflated to prevent any
material falling which might be stuck between
the tyres.
Make sure that all parts of the rim are in good
shape and are compatible with each other.
• During the operation, the operator must
check the state of the rim and tyre to make
sure that no part needs to be scrapped
(ex, cracks).
• A tyre should not be reassembled until
wheel, rim, rings or flanges have been
properly cleaned and greased (neither the “O”
ring groove nor the flange groove must
be greased).
NEVER STAY CLOSE TO
A TOOL WHILE IT IS
IN USE
CHOICE OF DISMANTLING TOOLS
• With 1 or 3-piece rims, a beadbreaker is
used. This tool will grip the rim or the wheel
and push the bead wire.
• In the case of 5-piece rims, ringbreakers
are used to grip the notches of the conical
rings.
• In some cases, Schrader has developed a
special tool range.
• The tools are used with 700 bar air hydraulic
or manual pumps.
Boxes and tools are available from
SCHRADER for all possible requirements.
These have been extensively tested by a wide
range of manufacturers for many years and
have proved their reliability throughout
the world.
Tyre specialists should select the most
suitable toolbox or tool for their project
requirements and in accordance with
the machinery used.
O-ring groove
Rim Tapered bead
seat ring
Locking ring
O-ring groove
Rim
Tapered bead
seat ring
Locking
ring
Rim flanges
Drop centre 1-piece rim
Different elements of a 3-piece rim.
Different elements of a 5-piece rim.
Follow the tool’s user instructions.
(1)
(1)
(2)
(2) (2)
(3)
(4)
(5)
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