Demounting Tubeless Tires; Locking Rims; Removing The Tires; Tool Positioning - Hofmann monty 1270 Manual Del Operador

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5.1-1
5.1-2
5.1-3
5.1-4
5.1

Demounting tubeless tires

• Remove all wheel-weights from the rim. Remove
the valve stem or core and deflate the tire (Fig.
5.1-1).
• Break outer bead starting from opposite the valve
position. lubricate the bead and rim with a tire
lube only. Break inner bead. Do not hold the foot
pedal depressed longer than necessary since this
could damage the bead. Liberally lubricate bead
and rim (Fig. 5.1-2).
WARNING!
ON RUN FLAT WHEELS WITH THE OPTIONAL LOW
PRESSURE SENSOR INSTALLED, BREAK THE BEAD
AT 90 DEGREES OFFSET FROM THE VALVE STEM.
DAMAGE TO THE WHEEL WILL RESULT IF THE BEAD
IS BROKEN AT ANY OTHER POINT ON THE RIM.
5.1.1

Locking Rims

• Set the rim clamps to the proper position: retract
clamps to clamp the wheel from the inside and
expand clamps to clamp from the outside. When
clamping small wheels (14" or smaller) from the
outside, set the clamps at diameter nearly equal to
the rim diameter, before placing the wheel on the
clamps. This will avoid the risk of pinching the tire.
WARNING!
TO MINIMIZE THE RISK OF SCRATCHING ALLOY
RIMS, THESE SHOULD BE CLAMPED FROM THE
OUTSIDE.
• Liberally lubricate bead and rim.
• Place the wheel WITH DROP CENTER
UPWARDS (Fig. 5.1-3) on the turntable, and
clamp in position.
5.1.2

Removing the tires

BEFORE PROCEEDING WITH THE TYRE
EXTRACTION, CHECK THAT BOTH BEADS ARE
COMPLETELY BROKEN.
5.1.2.1 Head positioning
5.1.2.1 Head positioning
Procedure:
Procedure:
• Position the mount/demount head in contact
• Position the mount/demount head in contact
with the rim edge and lock it into place: Turn the
with the rim edge and lock it into place: Turn the
adjustment knob until the mount/demount head
adjustment knob until the mount/demount head
clears from the rim flange about 1/25" (1 mm):
clears from the rim flange about 1 mm (1/25"):
this is necessary to avoid rim damage (Fig 5.1-4).
this is necessary to avoid rim damage (Fig 5.1-4).
Operator Manual

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