Maintenance
42/68-167-EN RHDE250 ... 4000 (Contrac) 35
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7 Maintenance
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Important
All maintenance activities may only be performed by properly qualified persons.
Contrac actuators feature a robust construction. As a result, they are highly reliable and require
minimal maintenance. The maintenance intervals depend upon the effective load and are
therefore not specified here.
The built-in microprocessor evaluates the actual load factors (e.g. torques, forces,
temperatures, etc.) and derives the remaining operating time until the next routine maintenance
is required.
Use the configuration program to view this information.
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7.1 Inspection and overhaul
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• Only use genuine spare parts such as ball bearings, gaskets and oil may be used to
overhaul the actuators.
• Proceed acc. to table when performing maintenance activities.
• Inspection or maintenance is due after the time specified in the table.
Overhaul intervals:
Interval Measures
1 x per year Visual check of the gaskets for leaks, change
if necessary.
every 2 years Functional check: drive the actuator 2 x
through the entire stroke range and check for
correct speed reduction.
every 4 years Check oil level
Change oil, roller bearings and gaskets on
motor and gearing.
max. every 10 years, preferably after the
expiry of the calculated remaining service life
Check gear wheels for wear; replace if
necessary.
Don’t drive the actuator during the oil check.
Make sure that no chippings or other material get into the gearbox during the maintenance
work.
If the actuators are used within a II2D classified area, clean the surfaces regularly in order to
avoid dirt deposits of more than 5 mm (0.20 inch). In order to avoid electrostatic charging use a
damp cloth to clean the lacquered surfaces.
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