
8
Inspection/maintenance
Inspection/maintenance work EDR..71 – 315, EDRN63 – 315 brakemotors
Operating Instructions – EDR..71 – 315, EDRN63 – 315
171
8.7.14
Changing the brake spring of BE05 – BE122 brakes
WARNING
Risk of crushing if the drive starts up unintentionally.
Severe or fatal injuries.
•
Disconnect the motor and all connected options from the power supply before
you start working.
•
Secure the motor against unintended power-up.
1. Remove the following:
•
Forced cooling fan and rotary encoder, if installed, see chapter
brake maintenance – preliminary work" (→
141).
•
Fan guard with encoder mount or fan guard [35], retaining ring [32]/[62], and
fan [36]
2. Remove the brake cable.
•
BE05 – 11:
Remove the terminal box cover. Remove the brake cable from the
rectifier.
•
BE20 – 122:
Loosen the locking screws of the brake plug connector [698]. Re-
move the plug connector.
3. Remove the clamping strap [157] and sealing strip [66].
4. Remove manual brake release if necessary.
•
Adjusting nuts [58], conical springs [57], studs [56], releasing lever [53], conical
seat [255], spherical washer [256]
5. Unfasten the hex nuts [61] and pull off the magnet body [54]
•
By approx. 50 mm (watch the brake cable!)
6. Replace or add brake springs [50/276/1312]
•
Arrange brake springs symmetrically
7. Assemble the brake parts again as described in the chapter
EDR..71 – 315, EDRN63 – 315 brakemotors" (→
•
Use the new hex nuts [61] and clean the contact surfaces of the nuts at the
magnet body of any residues of sealing compound.
•
Do so except for the fan [36] and the fan guard [35] because the working air
gap has to be set first, see chapter
"
Setting the working air gap of BE05 –
•
After having set the working air gap, make sure the areas at sealing strip [66]
and hex nuts [61] are correctly sealed.
8. In case of manual brake release: Use the adjusting nuts to adjust the floating
clearance "s" between the conical springs (pressed flat) and the adjusting nuts
(see chapter "Retrofitting the /HR, /HF manual brake release" (→
WARNING
No braking due to incorrectly set floating clearance "s".
Severe or fatal injuries.
•
Make sure the floating clearance "s" is correctly set, so that the pressure plate
can move up as the brake lining wears.
25896334/EN – 06/2019