Lenze 13.7xx Motors-Geared motors - Manual (Page 41)

Maintenance/repair
Inspection intervals
Inspection intervals of the GN motors
7
l
41 BA 13.0009 − EN 2.1
7.1.2.1 Wear control of the carbon brushes
K13.530−26
Fig. 13
4.03 Carbon brush
Subject the carbon brushes to the following wear control:
1. Remove fan cover,
2. Remove tightening strap on the B−bearing shield,
3. Remove, exhaust and vacuum the carbon debris in the interior of the motor using a
brush or similar,
4. Remove the carbon brushes (see Fig. 13) from the guide sleeves,
5. Measure the length (see Tab. 6) with a caliper gauge.
)
Note!
If the minimum length for the carbon brushes is reached (see Tab. 6), 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.
Dimensions of the carbon
brushes Motor type Length "r" new Minimum length "r
min.
"
[ mm ] [ mm ]
13.53 L.55 16 7.5
13.53 L.63/65 5.5
13.53 L.75/83 22 7.0
13.53 L.85/86 20 6.5
Tab. 6 Specifications regardingthe carbon brushes