Maintenance; Inspection And Overhaul; Brake Adjustment - ABB Contrac LME620-AI Operating Instruction

Maintenance

6 Maintenance
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.
6.1

Inspection and overhaul

• Only use original spare parts for components such as ball bearings and gaskets when
overhauling the actuators.
• Maintenance activities should be performed once the remaining calculated time has expired.
• Inspection or maintenance is due after the time specified in the table.
Overhaul intervals:
Interval
1 x per year
Max. every 10 years, preferably once the
calculated time before the next maintenance
operation has expired
Make sure that no chippings or other material get into the gearbox during the maintenance
work.
6.2

Brake adjustment

Warning - risk of injury!
Note that the actuator position may be changed accidentally by the repelling power of the
valve when the brake is released!
Make sure that process forces are not exerted on the thrust rod.
Since the brake is permanently released in AUT mode it is not exposed to mechanical wear.
Any readjustment is not necessary. Enables users to test the configuration software of the
brake.
20
Measures
Visual check of the gaskets for leaks, change
if necessary
Change, roller bearings and gaskets on motor
and gearing.
Check gear wheels for wear; replace if
necessary.
LME620-AI/-AN (Contrac) 42/68-273-EN