8 Maintenance and repair
Danger! Electric voltage! Operations in the vi-
cinity of live parts are extremely dangerous.
Any work required on the electric system may be carried out only by
skilled electricians. Tools for electricians (VDE tools) are absolutely
necessary.
Prior to commencing work:
1. Isolate (even auxiliary circuits).
2. Secure against reactivation.
3. Ensure de-energization.
4. Ground and short-circuit.
5. Cover or shield any adjacent live parts.
Personal and material damage during mainte-
nance work in operation!
● Do not carry out any maintenance measures while the machine is
running.
● While carrying out maintenance work, secure the machine such that
it cannot restart or be used by unauthorized persons.
Hot surfaces with temperatures over 70 °C may
cause burns!
● Allow the motors to cool down prior to commencing work.
● Wear safety gloves.
● Do not work on hot surfaces.
8.1 Maintenance
Motors
Excessive dirt, chips or dust can negatively influence the motor functions. In ex-
treme cases lead to motor loss. Clean the cooling fins of the motors at regular
intervals (after one year at the latest) to reach a sufficiently high heat emission
surface. If the cooling fins are partially covered with dirt, sufficient heat dissipa-
tion via the ambient air is no longer ensured.
An insufficient heat radiation may have undesired consequences. The bearing
lifetime is reduced by operation at impermissibly high temperatures (the bearing
MS2N Synchronous Motors
Bosch Rexroth AG
Maintenance and repair
DOK-MOTOR*-MS2N*******-IT03-EN-P
79/95
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