
Operating Instructions – Explosion-Proof AC Motors DR63/eDR63, DVE250/280
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8
Changing the blocking direction for motors with backstop
Inspection / Maintenance
8
Inspection / Maintenance
Only SEW service staff, repair workshops or plants that have the necessary expertise
may repair or modify the motor.
Before re-startup of the motor, make sure that all regulations are complied with and doc-
ument this with a label on the motor or a written test report.
Always perform safety and functional tests following all maintenance and repair work
(thermal protection).
WARNING
Risk of crushing if the hoist falls or in the event of uncontrolled unit behavior.
Severe or fatal injuries.
• Secure or lower hoist drives (danger of falling)
• Safeguard and/or protect the driven machine against touching
• Before starting work, disconnect the motor and, if installed, the forced cooling fan
from the power supply safeguarding them against unintentional re-start.
• Only use genuine spare parts in accordance with the valid spare parts list.
CAUTION
The surfaces on the drive can be very hot during operation.
Danger of burns.
• Let the motor cool down before you start your work.
CAUTION
For assembly, the ambient temperature and the oil seals themselves may not be
colder than 0 °C, otherwise the oil seals might be damaged.
INFORMATION
Before mounting oil seals, apply grease to the lip of the oil seals, see chapter "Order
information for lubricants and anti-corrosion agents" in the corresponding detailed op-
erating instructions.