TECO Electric Motor AEGHCF

Rotate the shaft a few revolutions

Pour in approximately one cup of oil

Confirm oil was poured and shaft was rotated

Refer to Table 1 for applicable interval in hours for your specific bearing number and RPM

Is the motor used in dirty or high ambient temperature or high humidity environments?

Select the type of grease used for the motor

Is the grease type identical to the one specified on the lubrication nameplate?

Ensure not to mix different kinds of grease

Calculate the amount of grease per replenishment using G = D*B*0.005 grams

Change the oil at regular intervals

Determine the time between oil changes based on operating conditions

Use good grade, oxidation-corrosion-inhibited turbine oils

Specify the viscosity of the oil based on bearing type, size, load, speed, ambient temperature, and cooling water

Is the ambient temperature near or below freezing?

Preheat the oil or use special oil if necessary

Ensure oil-metering hole is clear

5.7 Maintenance of slip ring — For Wound Rotor Motors only

Ensure motor is disconnected from power supplies

Verify there are no accessible moving parts before maintenance operation

5.7.1 Adjustment of carbon brush

Measure current brush pressure in psi

Enter brush cross sectional area in square inches

Calculate required tension using formula: 3.27 x brush cross sectional area in inches²

Is the current brush pressure within the normal operation range of 2.8 to 3.6 psi?

Is the brush area below 0.08 sq. in. (0.5 cm²) or are frequent vibrations evident?

Check for reverse shock load conditions

Inspect the frequency of pump starting and stopping

Evaluate the condition of ratchet pins for deformation

Listen for unusual noises from the ratchet pins

Replace ratchet pins if necessary

Inspect and maintain the check valve in the discharge line

Inspect and maintain the stop valve in the discharge line