TECO Electric Motor AEHE

Inspect the check valve for any signs of wear or damage

Inspect the stop valve for any signs of wear or damage

Ensure the check valve is protecting the pump from reverse flow and excessive backpressure

Ensure the stop valve is functioning correctly during priming, starting, and shutdown of the pump

Close the stop valve before stopping the pump

Check for any unusual noises or vibrations when the pump is operated against a high static head

Record any issues found during the inspection

Inspect ratchet pins for deformation

Inspect check valve and stop valve

Verify normal function of valves

2.6 Bearing protection — sleeve bearings

Ensure the following conditions are met for sleeve bearings

Rotate the motor shaft several revolutions to keep bearing journals well oiled and prevent rusting

Ensure the shaft does not come to rest in its original position after rotation

Push the shaft to both extremes of the endplay while rotating

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

Is the 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?

Adjust brush pressure using adjusting screw, pressure adjusting pin, or pressure adjusting plate as necessary

Re-measure brush pressure after adjustment

Are the wedges in their original position?

Is the binding at the coil end in its normal position?

Insulation resistance measurement

Refer to section 4.1.2 for insulation resistance measurement standards