Baldor Reliance Electric Motor 9240-SB-TEFC

Section 3 – Anti-Friction Bearing Removal/Replacement

Ensure equipment connected to the motor shaft cannot cause shaft rotation

Disconnect all electrical power from the motor windings and accessory devices

Replace bearing when worn, oversize, or when TRG/bearing temperature monitoring indicates excessive wear

Remove the bearing using a conventional bearing puller

Protect the shaft center using a spacer block of bass or soft material

Section 3 – Checking Insulation Resistance

Check conditions for insulation resistance testing

Measure the insulation resistance of the stator winding

Enter the rating machine potential (KV) in kilo volts

Calculate and enter the minimum insulation resistance (RM)

Is the insulation resistance significantly changed from previous readings?

Is the insulation resistance less than the calculated RM?

Bake in an oven at a temperature not to exceed 90°C

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 – Anti-Friction Bearing (Grease Lubricated)

Ensure standard conditions are met (8 hrs/day, normal or light loading, clean ambient air at 40°C max)

Check motor nameplate for relubrication intervals and volumes

Refer to motor nameplate for recommended lubricant

Select alternate lubricants if necessary

Ensure use of clean, fresh grease from clean containers

Verify grease compatibility if mixing is necessary

Ensure grease is free of dirt to avoid damage to motor bearings

Section 1 – Storage (less than 6 months)

Ensure grease lubricated bearings are not lubricated during storage

Verify Duty Master anti-friction bearing motors are shipped with the proper amount of grease in each bearing

Record the number of days since last shaft rotation

Replace protective packing and shaft shipping brace after rotating the shaft

Inspect the motor periodically and check insulation resistance

Is the storage location cold, damp, or humid?

Apply power to the motor's space heater if installed