Siemens 1FT Series Safety And Operating Instructions Manual page 16

3.6 Removing / Fitting the motor rotor
including bearing replacement
Removing (see Fig. 109.1, 109.2)
- Mark position between endshields on housing
- Remove nuts (1.97) or screws in the case of 1FT5 13. (1.49) from D-
end endshield (1.40)
- Carefully pull motor rotor (3.10) together with D-end endshield out of
motor stator (4.00)
NOTE: When rotor is removed, protect from contamination with magnetic
waste (plastic bag)
- Release screws (1.48) and remove D-end endshield
- Pull off D-end bearing (1.60) and sleeve (1.41) with suitable tool (see
Fig. 109.2), heat sleeve to approx. 180°C to reduce the effect of the
adhesive
- Pull off N-end bearing
Fitting
- Fit new D-end and N-end bearings on motor shaft, making sure that the
D-end bearing fits in the centring hole of the bearing cover (1.44)
NOTE: We recommend that the roller bearings be heated evenly to
approx. 80-100°C for fitting purposes; never strike the bearings violently
(e.g. with a hammer)
- Apply adhesive (e.g. Loctite 243) to the inside of the sleeve (1.41) and
push onto the shaft as far as the shoulder - on motors with safety rating
IP 67, the adhesive must form a sealIf fitting a radial shaft seal (IP 67),
refer to Fig. 110
We recommend that the sleeve (1.41) is replaced on motors with a radial
shaft seal (1.42)
- Fix bearing cover with screws (1.48), tighten to specified torque (see
Fig. 109.1)
- Insert motor rotor with D-end endshield into the motor stator and fix to
stator
3.7
Removing/Fitting motor rotor including
bearing replacement on motor with brake
NOTE: In principle it is possible to replace or fit a fail-safe brake at a later
date, however, the modification should only be done by a SIEMENS
Service Center.
3.7.1 Removing the brake connections
Terminal box
- Remove terminal box cover
- Release brake connecting leads from terminal box. Cut off end lug on
brake connecting lead
Connector size 1 (see Fig. 109.2)
- Unscrew connector (5.100)
- By releasing the catch (V) and pressing towards the insulator at the
same time, remove insulator from housing
- Remove pin contacts for pins 4 and 5 for brake connections using
removing tool (see SIMODRIVE accessories)
- Cut off brake connecting leads at the contacts
Connector sizes 2 and 3
- Unscrew connector cover
- Release screws for brake connections and cut off lugs
10
ENGLISH
3.7.2 Removing/Fitting motor rotor with D-end
and N-end bearings
Removing (see Fig. 109.1, 109.2)
- Mark position between endshields on housing
- Remove nuts (1.97) or screws in the case of 1FT5 13. (1.49) from D-
end endshield (1.40)
- Carefully pull motor rotor (3.10) together with D-end endshield out of
motor stator (4.00) - be careful not to damage brake connecting leads
NOTE: When rotor is removed, protect from contamination with magnetic
waste (plastic bag)
- Release screws (1.48) and remove D-end endshield
- Pull off magnet body and brake connecting leads together with D-end
bearing (1.60) and sleeve (1.41) with suitable tool (see Fig. 109.2), heat
sleeve to approx. 180°C to reduce the effect of the adhesive
NOTE: Before pulling off the magnet body, the brake must be energized
(24 V DC ± 10%, check for correct polarity) so that the brake is released
and the diaphragm springs are not overstressed
- Pull off N-end bearing
Fitting
- Energize magnet and fit magnet to armature plate
- Fit new D-end and N-end bearings on motor shaft making sure that the
D-end bearing fits in the centring hole of the magnet body
NOTE: We recommend that the roller bearings be heated evenly to
approx. 80-100°C for fitting purposes; never strike the bearings violently
(e.g. with a hammer)
- Disconnect power source
- Apply adhesive (e.g. Loctite 243) to the inside of the sleeve and push
onto the shaft as far as the shoulder - on motors with safety rating IP67,
the adhesive must form a sealIf fitting a radial shaft seal (IP67):
We recommend that the sleeve (1.41) be replaced on motors with a
radial shaft seal (1.42)
- Fix magnet and D-end endshield with screws (1.48), tighten to specified
torque (see Fig. 109.1) and maintain specified clearance!
- Feed brake connecting leads into the slot on the outside of the stator
- Insert motor rotor with endshield and brake into the motor stator and at
the same time feed through the brake connecting leads to the power
connector or terminal box
- Fix D-end endshield to stator
3.7.3 Connecting the brake leads
Terminal box
- Fix lugs to ends of wires and connect to to terminals
- Close terminal box
Connector size 1
- Crimp pin contacts for pins 4 and 5 to brake connecting leads (for details
of crimping pliers see SIMODRIVE accessories) and insert into insulator
as per circuit diagram
- Snap insulator into position in the connector
- Screw on connector
Connector sizes 2 and 3
- Fit lugs to ends of leads and screw to pin contacts as per circuit diagram
- Screw on connector cover
3.8 Adjustments
3.8.1 Tachogenerator + pos. encoder