Servicing
9.1 Inspection and maintenance
1FT7 synchronous motors
48 Operating Instructions, 04/2010, 610.40075.40b
9.1.2 Maintenance intervals
General information
Careful and regular maintenance, inspections, and overhauls are essential for detecting and
eliminating faults in good time before they can cause any consequential damage.
NOTICE
Inspection if there are faults or unusual conditions
Unusual conditions or faults that place undue electrical or mechanical stress on the three-
phase motor (e.g. overload, short-circuit, etc.) can cause consequential damage to the
machine.
If faults or any unusual conditions occur (e.g overload or short-circuit, etc.), the machine
must be inspected immediately.
Measures, inspection/maintenance intervals
Operating conditions and performance can vary widely. For this reason, only general
maintenance intervals for problem-free operation can be specified here.
● Maintenance intervals should therefore be scheduled to suit the on-site conditions
(fouling, switching frequency, load, etc.).
● Perform the following measures after the operation time or the interval specified in the
table below elapses.
Table 9- 1 Measures after operation times or intervals
Measures Operation times and intervals
Replace the bearings After the recommended bearing replacement intervals (see the
chapter titled "Bearing replacement intervals")
Replace the radial shaft sealing
rings
Approximately every 10,000 operating hours with oil lubrication
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