Hofmann ATC 900, Service Manual

Page: 33 / 120

CTC-CEN Service Manual 07-13 Rev.E
33
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Disconnect the actuator M2 following par.5.5
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Proceed following the next steps.
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At the end adjust the actuator following par. 5.5.
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Perform the bead breaker arm calibration.
TO CHECK THE 3 TURNS MASTER POTENTIOMETER:

Turn the machine off.

Remove the electric cover.

Position the upper bead breaker arm to the inward end of stroke.
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Turn the machine on.
MACHINE UNDER TENSION DANGER OF ELECTRIC SHOCK

Take the multimeter and select it in VDC.

Position its terminals on the potentiometer wires green and white.
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Move the arm until end of stroke: the multimeter must display a value from -4.6 to -0.121 on 5K potentiometer
and -9.6 to -0.2 on 10K one.