6
Inspection and Maintenance
Inspection and maintenance intervals
32
Operating Instructions – Explosion-Proof VARIMOT
®
Variable Speed Gear Units and Accessories
6
Inspection and Maintenance
6.1
Inspection and maintenance intervals
Strict adherence to the inspection and maintenance intervals is absolutely neces-
sary to ensure safe working conditions and explosion protection.
• Strictly observe the safety notes in the individual sections.
• All maintenance work must be carefully performed by qualified personnel.
•
Work on the gear unit only when the machine is not in use. Prevent the drive
unit from unintentionally starting up (for example, by locking the keyswitch or
removing the fuses from the power supply). Place an information sign by the
on-switch to warn that the gear unit is being worked on.
•
Use only OEM spare parts from the appropriate and valid spare parts list;
otherwise, the explosion rating of the variable speed drive becomes void.
Unit/unit part Interval
What to do?
Details on page ...
VARIMOT
®
As required
Eliminate dust accumulation
> 5 mm by cleaning
VARIMOT
®
Weekly
Pass through speed range
VARIMOT
®
Every
3000
operating
hours, at least
every
6 months
•
Check torsional play
•
Checking the bearings
•
Check oil seals and
replace with original SEW-
EURODRIVE spare parts
in case of heavy wear
(do not install in the same
track)
•
Check running noise/
temperature of anti-friction
bearing
Interior of the variable speed
gear unit:
•
Check for dust
accumulation
•
Remove existing dust
deposits
See "Checking torsional
play" (see next page)
See "Measuring tempera-
ture of anti-friction
bearing" on page 36
VARIMOT
®
Every
6000
operating
hours
Replace the friction ring
See "Replacing the
friction ring" on page 35
