7
Inspection/maintenance
Inspection/maintenance work for DR..71 – 315, DRN63 – 315, DR2..56 – 80 brakemotors
Operating Instructions – AC Motors
165
7.6.18
Changing the magnet body of BE05 – BE122 brakes
1. Disconnect the motor and all mounted options from the power supply before start-
ing to work, and secure the motor against unintentional power-up.
2. Remove the following:
•
Forced cooling fan and rotary encoder, if installed, see chapter "Motor and
brake maintenance – preliminary work" (→
123).
•
Fan guard with encoder mount or fan guard [35], retaining ring [32]/[62] and fan
[36]
3. Remove the rubber sealing collar [66] and the manual brake release:
•
Setting nuts [58], conical coil springs [57], studs [56], releasing lever [53], paral-
lel pin [59].
4. Remove the brake cable
•
BE05 – 11:
Loosen the terminal box cover and unfasten the brake cable from
the rectifier.
•
BE20 – 122:
Loosen locking screws of the brake plug connector [698] and re-
move plug connector.
5. Loosen hex nuts [61], remove complete magnet body [54], remove brake springs
[50]/[276]/[1312].
6. Install new magnet body with brake springs. For the possible braking torque steps,
refer to chapter "Technical data" (→
191).
7. Brake parts are installed as described in chapter "Working steps for inspecting
DR..71 – 315, DRN63 – 315, DR2..63 – 80 brakemotors" (→
148).
•
Except for the fan and the fan guard, because the working air gap has to be set
first, see chapter "Setting the working air gap of BE05 – BE122
brakes" (→
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.
9. Put the sealing strip [66] in place and re-install the dismantled parts.
10. Replace the brake control in the event of an interturn short circuit or a short circuit
to frame.
INFORMATION
Replace the setting sleeves [58] if the removal procedure is repeated.
25851535/EN – 02/2019
Содержание DR 315 Series
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