Disassembly - Bosch Rexroth MAD Operating Instruction

DOK-MOTOR*-IDYN*A*EXPD-IB05-EN-P
Rexroth MAD and MAF Motors in EX px d Design acc. to ATEX Directive 2014/34/EU
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Disassembly

WARNING
● Work on machines is only allowed if they are secured and while they
are not running.
● Before accessing motors after having switched them off, allow them to
cool down for a sufficient period of time. A cooling time up to 140 mi‐
nutes can be necessary!
● Make sure that the motor is only dismantled in the de-energized state
and a non-explosive atmosphere.
● Before working on the system, always use a suitable measuring instru‐
ment (e.g. multimeter) to assure that the parts no longer have a residual
voltage (e.g. due to the residual energies of capacitors in filters, drive
devices, etc.). Wait for their discharging time.
● Before starting disassembly, secure the machine against unforeseeable
movements and against unauthorized operation.
● Before disassembling the motor and the supply lines, secure them
against dropping or moving and disconnect the mechanical connections
only thereafter.
● Observe the notes regarding dismantling in the documentation of the
motor purging control device.
In the case of malfunctions, maintenance, deactivation or disassembly of the
motors, proceed as follows:
1. Use the control commands to bring the drive to a controlled standstill.
2. Switch off the power and control voltage of the controller.
3. Switch off the motor protection switch for the motor fan (only for MAD).
Switch off the supply of the external cooling system (only for MAF).
4. Switch off the control device for motor purging (observe the notes of the
manufacturer regarding switch-off).
5. Switch off the main switch of the machine.
6. Secure the machine against accidental movements and against unau‐
thorized operation.
7. Wait for the cooldown times of the motor and the discharge time of the
electrical systems to elapse.
8. Disconnect all electrical connections. Disconnect the purge gas ducts at
the connection threads of the motor.
9. Before disassembling the motor and the supply lines, secure them
against dropping or moving and disconnect the mechanical connections
only thereafter.
10. Dismount the motor from the machine. At the MAF motor, also empty
the coolant channels.
11. Record all measures taken in the commissioning log.
Bosch Rexroth AG
Possible injuries due to errors during the acti‐
vation of motors or work on moving elements!
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Disassembly