KNF AC Motor M 43 Ex
Servicing
Translation of original Operating and Installation Instructions, english, KNF 121218-121646 01/13
14
8. Servicing
Servicing schedule
WARNING
Danger of explosion due to wear!
Î
Have motor bearings replaced by KNF Neuber-
ger according to servicing schedule
(see table 8).
Component
Servicing interval
Motor bearings
-
Have them replaced after 17,000
operating hours or 24 months at the
latest
Lead-through, con-
nection or lead-in
parts
-
Inspect regularly
-
In case of damage, the damaged parts
must be replaced by original spare
parts in perfect order.
Screws used for
attaching the end
plate, the bearing
flange and the termi-
nal box
-
Check regularly that the device is
mounted firmly, and that all parts are
in perfect order.
-
Replace any damaged screws
(for requirements regarding screws,
see Table 9).
Tab. 8
Mounting
place
Screw
Property
class
Tightening
torque
Bearing
flange
Cheese-head screw
DIN EN ISO 4762 (DIN
912) M 5x16
8.8 5.9
Nm
Bearing
shield
Cheese-head screw
DIN 6912 M 5x16
8.8 4.6
Nm
Terminal box Cheese-head screw
EN ISO 1207 (DIN 84)
M 4x30
4.8 28
Ncm
Tab. 9
WARNING
Danger of Explosion
Î
The machined bearing and locating surfaces on
the motor frame, the bearing shields, the bearing
flanges, and on the motor shaft must never be
re-machined or painted.
Î
No seals are allowed between the surfaces
essential for maintaining flame path resistance.
