9 Maintenance/repair
M aintenance operations
Holding brake
9.2.3 Holding brake
The brakes need to be checked on a regular basis to ensure safe and trouble-free
operation.
The necessary m aintenance intervals prim arily depend on the stress to which the brake
is subjected in an application. W hen a m aintenance interval is being calculated, all
causes of wear must be taken into account (see notes ”W ear on spring-applied brakes”).
In the case o f brakes which are subjected to low levels of stress, e.g. holding brakes w ith
em ergency stop function, regular inspections at a fixed tim e interval are recommended.
In order to reduce the am ount of w ork involved in maintenance, perform the inspection
at the same tim e as other maintenance w ork carried out cyclically on the machine if
possible.
If the brakes are not properly serviced, operating faults, production outages or damage
to m achinery can occur. A maintenance concept adapted to the operating conditions
and the stresses to which the brakes are subjected must therefore be drawn up for every
application. For brakes, the m aintenance intervals and servicing w ork listed in the
follow in g table are necessary.
Maintenance interval for holding brake with
emergency stop
Maintenance work
At least every 2 years
Inspection of the brake integrated in the motor:
After 1 million cycles at the latest
• Check ventilation function and
Shorter intervals in the case of frequent emergency
stops!
activation/deactivation
The brakes o f the MCS, M CA, M Q A, and MDDKS m otors cannot be accessed from the
outside! (Maintenance w ork on the brakes m ust be carried out by Lenze Service staff
only!)
9.3 M aintenance operations
@ Stop!
• M ake sure th at no foreign bodies can enter the inside of the motor!
• Do not remove plugs when voltage is being applied!
А Danger!
• O nly w ork on the drive system when it is in a deenergised state!
• Hot m otor surfaces o f up to 150 °C. Observe cooling tim es!
• Rem ove loads acting on motors or secure loads acting on the drive!
9.3.1 Blower
If the m otor is equipped w ith a dust protection filter, this filter must be cleaned or even
replaced at regular intervals depending on the am ount o f dust (if necessary, daily).
For m otors equipped w ith a dry filter, the dust must be shaken out com pletely. If the
dust is w et, the filte r m at m ust be replaced.
40
Lenze • BA 33.0006 • 3.0
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