Lenze 13.7xx Motors-Geared motors - Manual (Page 42)

Maintenance/repair
Inspection intervals
Inspection intervals of the PM motors
7
l
42 BA 13.0009 − EN 2.1
7.1.3 Inspection intervals of the PM motors
(
Stop!
Permanent magnetic field!
During mounting and repair, ensure that no contaminants enter the interior of
the motor!
Carbon brushes and, to a limited extent also the collectors, are wearing parts in the case
of commutator machines.
As the wear of the carbon brushes to a great extent depends on the respective operating
conditions, we recommend the following inspection intervals:
– First inspection after approx. 100 operating hours
– Second inspection after 300 further operating hours
Subject the carbon brushes to the following wear control:
1. Remove the carbon holder covers on the B−bearing shield (pos. 5.05 Fig. 14).
2. Remove, exhaust and vacuum the carbon debris in the interior of the motor using a
brush or similar,
3. Remove the carbon brushes (see Fig. 14) from the guide sleeves,
4. Measure the length (see Tab. 7) with a caliper gauge.
K13.120−23
Fig. 14 Carbon covers
4.03 Carbon brushes
5.05 Cover for carbon brush holders
)
Note!
If the minimum length for the carbon brushes is reached (see Tab. 7), they
basically have to be replaced in sets!
ƒ Only use original replacement carbons or types approved by the manufacturer, (for
order, see chapter 7.3)!
ƒ Use carbon brushes so that they smoothly slide in the brush holders.
ƒ Install pigtails so that the carbons can unimpededly follow through if they are
shortened due to wear.
ƒ Support the running−in of the carbon brushes, if required by using sanding chalk.