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Motor Gearbox Inspection and Maintenance Instructions
Inspection of the motor brake, mechanical brake, motor gearbox and frequency drive are required
according to the indications below. Inspection and maintenance must be performed by an ETC trained/
authorized person.
WARNING:
Unit/Unit Part
• If used as a working brake:
Motor brake
• If used as a holding brake:
Mechanical brake
• Every 400 operating hours
Motor and Gearbox • Every 1000 operating hours
• The interval depends on outer
Variable Frequency
Drive
Maintenance Procedures
The following sections provide step-by-step maintenance instructions for different areas of the hoist.
Tail End (Onstage) Maintenance
•
Motor End (Offstage) Maintenance
•
•
Hoist Brake Adjustments
Loft Block Maintenance
•
30
Always disconnect and lock out the hoist main electrical connection from its
power supply before performing any maintenance work inside the motor
control box. Wait at least two minutes before opening the motor control box
to allow any residual energy of electrical components to dissipate.
Frequency
At least every 3000 operating
hours
Every 2 to 4 years, depending
on operating conditions
influences and can be very
short; e.g., in the event of high
dust concentration in the
environment.
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Inspect the brake:
• Measure the brake disc thickness
• Brake disc, lining
• Measure and set working air gap
• Pressure plate
• Driver/gearing
• Pressure rings
• Vacuum up the abraded matter
• Inspect the switch contacts and change
if necessary (e.g., in case of burn-out)
Inspect the brake:
• Check for signs of wear and/or fatigue
• Look for buildup of dust around the
brake mechanism
• Inspect the screw and bolt heads for
signs of fatigue
• While running the hoist, listen for
excessive brake noise
Test the brake in both static and dynamic
conditions
Inspect the motor:
• Check rolling bearings and change if
necessary
• Replace the oil seal
• Clean the cooling air passages
• Touch up or renew the surface/
anticorrosion coating
• Check and clean the air filter
• If applicable, clean condensation drain
hole at the bottom of the fan guard
• Clean clogged bores
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What to do?
Vortek NXT Hoist Installation Manual
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