Maintenance and servicing
21
1. Switch off NED, secure against switching on again and ensure that it
is volt-free.
2. Loosen screw (1) and remove unbalance covers (3).
3.
Disassemble unbalances type XL and
type XLs:
Screw a long screw with the same thread
into a tapped hole for the fastening
screws (1) of the unbalance cover. Put a
lever between the unbalance discs and this
long screw. After loosening the locking
nut (4), the unbalances can be removed
from the shaft.
4. Remove circlip (54).
5. Replace both bearings (13) with equivalent bearings.
6. Assembly is carried out in the reverse order.
7. Tighten locking nuts (4) to the specified tightening torque.
8. Before mounting the unbalance covers, replace the seals (5) with
equivalent seals and check for correct fit.
9. Mount unbalance covers.
