SEW eurodrive Electric Motor DT90L4

8.1 Inspection and maintenance intervals

Change the low-viscosity grease in the backstop

8.3 Inspection / maintenance on the motor — Lubrication of the backstop

Check the temperature range compatibility

Select the motor type for lubrication

Apply the specified amount of grease

8.2 Preliminary work for motor and brake maintenance

Isolate the motor and brake from the power supply before starting work

Remove the EV1. incremental encoder / AV1H absolute encoder

Remove incremental encoder ES1. / ES2. / EH1.

Remove the proximity sensor NV1. / NV2.

Inspection / maintenance of the BMG61/122 brake

Ensure the following conditions are met before starting maintenance

BMG61/122 brake without encoder mounting — set the working air gap

Isolate the motor and brake from the supply, safeguarding them against unintentional power-up

Remove the forced cooling fan, if installed, and the flange cover or fan guard [27]

Push the rubber sealing collar aside [5], releasing the clamping strap to do this if necessary, and extract the abraded matter

Measure the brake discs [6], [10] and record the thickness

Is the brake disc thickness < 12 mm?

Loosen the setting sleeve [9] by turning it towards the bearing end shield

Changing the braking torque for BR03 brake

Isolate the motor and brake from the supply, safeguarding them against unintentional power-up

Unscrew the hand lever, remove the fan guard and the fan

Loosen the screws and remove the complete brake with the releasing lever

Loosen the screws and remove the guide ring with friction plate, brake disc, pressure plate and damping plate

Remove the brake springs from the brake coil body and replace them with new ones

Position the new brake springs symmetrically

Slide the damping plate over the two studs attached to the pressure plate so the embossing pattern is located with the projecting side facing the pressure plate

Place the pressure plate on the brake springs together with the damping plate; guide the studs attached to the pressure plate through the holes in the brake coil body and ensure correct positioning

8.1 Inspection and maintenance intervals

Ensure the following safety precautions are taken

Inspect the following components for brake types BMG02, BR03, BMG05-8, BM15-62

BMG02 Brake Inspection (Sec. 8.4)

Isolate the motor and brake from the supply, safeguarding them against unintentional power-up

Unscrew the hand lever, remove the fan guard and the fan

Loosen the screws and remove the complete brake with the releasing lever

Measure the thickness 'd' of the brake disk

Is the brake disk thickness at or above the minimum value?