9.1.2 MTTR
Note
The operating conditions can vary greatly. For that reason, the following table only states
general intervals for inspections and service during fault-free operation.
Table 9-1 MTTR in fault-free operation
Measure Interval Time limit
Initial inspection After 500 operating hours After a half year at the
latest
Regreasing After 1000 to 16 000 operating hours (depending on
bearings and operating mode)
After three years at
the latest
Cleaning Dependent on local degree of pollution or when brush‐
es are replaced
Follow-up inspection 2,000 operating hours after the previous inspection After a half year at the
latest
General inspection Approximately every 16 000 operating hours After two years at the
latest
9.1.3 Main inspection
The main inspection of the machine should be carried out after approximately 16000 operating
hours, but no later than after two years of operation.
DANGER
Rotating or live parts
Rotating or live parts are dangerous. Death, serious injury, or material damage can result if
the required covers are removed.
If no inspection windows are fitted and, as a result, the appropriate covers need to be removed
to allow inspection of the commutating performance, these covers may only be dismounted
by specially qualified personnel. This ensures that there is no contact with live or moving
parts. Wear safety goggles when working.
Checking the motor when in operation
● The relevant technical data are observed: power consumption, temperature of windings,
bearings, coolants, etc.
● There should be no oil, grease, or water leakages.
● The smooth running characteristics and motor running noise have not deteriorated.
● No impermissible brush sparking occurs in operation.
Maintenance
9.1 Inspection and maintenance
SIMOTICS DC 1GG6
86 Operating Instructions 02/2016
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