Baldor Reliance Electric Motor 8040-AF-TEFC

Section 3 – Checking Insulation Resistance

Check insulation resistance of the stator winding with an insulation resistance meter

Record the insulation resistance reading

Investigate significant changes in insulation resistance

Calculate minimum insulation resistance (RM) using the formula RM = KV + 1

Is the insulation resistance less than the calculated RM?

Bake in an oven at a temperature not to exceed 90°C until insulation resistance remains constant

With rotor locked, apply low voltage and gradually increase current through winding until winding temperature reaches 90°C

Section 3 – RENK Sleeve Bearing Replacement

Disconnect all electrical power from the motor windings and accessory devices before disassembly of the motor

Replace sleeve bearing without disturbing the setup and uncoupling from the driven equipment

Remove the top and bottom bearing liners as stated in RENK Sleeve Bearing Removal Instructions

Ensure shaft bearing shoulders and journal are free of nicks and burrs before replacing bearing

Dress shaft with emery cloth or stone as necessary

Clean the shaft and oil sump thoroughly

Apply a coating of oil to the bearing journal

Inspect the replacement bearing for nicks and damage

Section 3 – Semi-Annual Maintenance − 6 months

Perform all quarterly inspections (see 3 Monthly Motor Periodic Inspection task)

Inspect and clean rotor ends, windings and fan blades (Open Motors only)

Check electrical connections for tightness and absence of corrosion

Section 3 – Winding Maintenance

WARNING — Solvents can be toxic and/or flammable — follow manufacturer's safety procedures and directions — failure to observe this precaution could result in bodily injury

CAUTION — Do not use solvents containing trichloroethane to clean interior or exterior of motor — damage may occur to paint and insulation systems

Disconnect and lockout the power source

Ensure no power is applied to the motor

Section 3 – Sleeve Bearings (Oil Lubricated) – Severe and Extreme Conditions

Is the oil discolored or contaminated?

Follow the oil change procedure as per the standard Sleeve Bearing Oil Change task

Select oil viscosity and quality as per Table 3-4 and Section 3 Sleeve Bearings (Oil Lubricated)

De-energize the motor by opening the manual disconnect switches

Remove drain plug and drain oil

Does the oil appear to be contaminated?

Section 3 – Periodic Inspection

Listen for any abnormal noises and check cause immediately

Check for any vibration and check cause immediately if excessive vibration is found

Check voltage and frequency variations

Check power supply total harmonic distortion to avoid overheating

Check that air filters are in place and clean

Check all air passages and ensure that they are not blocked or clogged

Disconnect and lockout the power source