The operations which must be carried out periodically in order to ensure the correct functioning of the MGM
brake motor are listed further on. The frequency of inspection depends on the particular motor duty (number of
start/stop, applied moment of inertia, environment conditions and so on). Generally it's advisable to proceed to
the first inspection after few weeks of working and to draw up a periodical maintenance plan. Anyway it's
recommended to provide inspections at least twice a year. For specific information please contact the M.G.M.
motorielettriciS.p.A.organization.
- Periodically check that the motor properly operates without abnormal noise or vibrations which could mean
deterioration of bearings. Bearings mounted on MGM motors are of life-lubricated double-screen waterproof
type.
-Checkthatthemotoristightlyfixedthroughflangeandfeet.
-Checkthatthecurrentdoesnotexceed thevaluewrittenonthenameplate.
-Checkthattheairopeningsforventilationarenotobstructed.
-Checkthatthefeedingcablesandearthgroundingarecorrectlytightened.
- As a result of normal wear of the brake disc lining, check that the air gap does not exceed the values shown on
table 1. Please note that the brake linings wear is greater during the run-in. (few thousands stops). For the air
gapadjustment,followtheinstructionsgivenintotheparagraph"AirGapAdjustment".
-Check the wear on both friction surfaces of the brake disc to be sure that the brake disc thickness is not less
thanthevalueindicatedonthetable1. (Forreplacement,refertotheparagraph"BrakeDiscReplacement").
- Verify periodically that the braking torque is suitable. If needed, proceed to its adjustment as stated in the
paragraph"Brakingtorqueadjustment".
- All brake assembly components are subject to wear. In consideration of safety it's needed to replace them
periodically as preventive action. The replacement frequency comes from the motor duty (number of start/stop,
appliedmomentofinertia,environmentconditionsandsoon), we recommend however to replace them at least
every18months.
Loosen the end cover screws (82) of the end cover (76) and remove it. After removing the fan snap ring(72), slid
the fan (71), remove the elastic washer and the hand release - if they are present - loosen the connecting
screws (77), unscrew the fixing screws (79) and draw out the brake coil - brake moving element group (74-75).
Take off the old brake disk (73) and insert the new one. For re-assembling, proceed backwards and remember to
adjust the air gap. It is advisable to handle the new brake disk with clean hands, as even a small trace of grease
willdecreasethebrakingperformanceandincreasethenoise.
Disconnectthetwo terminals of the brake coilinsidetheterminal box. Unscrew the end coverscrews(82)of the
end cover (76) and remove it. After removing the fan snap spring (72), slide the fan (71), remove the elastic
washer and the hand release if they are present, loosen the fixing screws (79) and take out the brake coil (75).
Insert the new brake coil, hence proceed backwards with the operations described for motor reassembly.
Remembertoadjusttheairgap.
Theairgapbetweenthebrakemovingelement(74) and the brake coil (75), which can be surveyed by means of a
thickness gauge, must be as shown on table 1. In order to set the air gap back to the required value, operate on
theconnecting screws (77), byturning the fixing screws (79)in order to movethe brake coil (75)forwards closer
to the rear cover (84).With a constant air gap at the fixing screws, operate on the connecting screws again
clockwise so to block the brake coil in the new position. Once the operation is completed, check the air gap
againand,ifnecessary,repeattheoperation.
On BM56 motors and BML motors and on motors with IP56 protection degree it'isn't possibile to adjust the
airgap. When the airgap exceeds the maximum value indicated on table 1 it's necessary to replace the brake
Brake Disc Replacement
Brake Coil Replacement
Air GapAdjustment
The operations which must be carried out periodically in order to ensure the correct functioning of the MGM
brake motor are listed further on. The frequency of inspection depends on the particular motor duty (number of
start/stop, applied moment of inertia, environment conditions and so on). Generally it's advisable to proceed to
the first inspection after few weeks of working and to draw up a periodical maintenance plan. Anyway it's
recommended to provide inspections at least twice a year. For specific information please contact the M.G.M.
motorielettriciS.p.A.organization.
- As a result of normal wear of the brake disc lining, check that the air gap does not exceed the values shown on
table 1. Please note that the brake linings wear is greater during the run-in. (few thousands stops). For the air
gapadjustment,followtheinstructionsgivenintotheparagraph"AirGapAdjustment".
-Check the wear on both friction surfaces of the brake disc to be sure that the brake disc thickness is not less
thanthevalueindicatedonthetable1. (Forreplacement,refertotheparagraph"BrakeDiscReplacement").
- All brake assembly components are subject to wear. In consideration of safety it's needed to replace them
periodically as preventive action. The replacement frequency comes from the motor duty (number of start/stop,
appliedmomentofinertia,environmentconditionsandsoon), we recommend however to replace them at least
every18months.
