14.4
Maintenance
14.4.1
General information
MSK motors operate maintenance-free within the specified operating condi‐
tions and service life. Operation under unfavorable conditions can, however,
lead to restrictions in availability.
Increase availability with regular preventive maintenance measures. Observe
the information of the machine manufacturer in the machine maintenance
plan and the maintenance measures described in the following.
Danger! Electric voltage! Operations in the vi‐
cinity of live parts are extremely dangerous.
WARNING
Work required on the electric system may only be carried out by skilled elec‐
tricians. Tools for electricians (VDE tools) are absolutely necessary.
Prior to commencing work:
1. Isolate (even auxiliary circuits).
2. Protect the system or plant against restart.
3. Ensure de-energization.
4. Ground and short-circuit.
5. Cover or shield any adjacent live parts.
Before starting to work, check with an appropriate measuring device whether
parts of the system are still under residual voltage (e.g. caused by capacitors,
etc.). If yes, wait until these parts have discharged.
Combustions via hot surface with tempera‐
tures over 60 ℃
CAUTION
Let the motor cool down, before maintenance. The thermal time constant sta‐
ted in the technical data is a measure for the cooling time. A cooling time up
to 140 minutes can be necessary!
Use safety gloves.
Do not work on hot surfaces.
Personal and material damage during main‐
tenance work in operation!
WARNING
Never carry out maintenance work on running machines.
Before starting maintenance work, secure the machine against switching on,
operation and unauthorized use.
14.4.2
Cleaning
Excessive dirt, chips or dust can negatively influence the motor functions. In
extreme cases lead to motor loss. Clean the cooling fins of the motors at reg‐
ular 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 dissipation via the ambient air is no longer ensured.
Insufficient heat dissipation can have undesirable consequences. The bear‐
ing life is reduced by operation at inadmissibly high temperatures (bearing
grease decomposes). Overtemperature switch-off despite operation on the
basis of selected data, because the appropriate cooling is missing.
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
Bosch Rexroth AG
159/175
Synchronous Servomotors MSK For Potentially Explosive Areas
Commissioning, operation and maintenance
