Baldor Reliance Electric Motor 9240-AF-TEFC

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

Rotate the shaft by hand 10 to 15 revolutions

Replace protective packing and shaft shipping brace after rotating the shaft

Inspect the motor periodically and check insulation resistance monthly

Is the storage location cold, damp, or humid?

Select the method used to protect motor windings from moisture

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

Periodic checks of phase, voltage, frequency, and power consumption of an operating motor are recommended

Check to see that air filters, when used, are in place and clean

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

Section 3 – Anti-Friction Bearing Removal/Replacement

Ensure safety precautions are in place

Is the bearing worn, oversized, or showing excessive wear based on TRG/bearing temperature monitoring?

Remove the end shield (see Sleeve/Anti-Friction Bearing Bracket Removal)

Remove the bearing using a conventional bearing puller with a spacer block to protect the shaft center

Clean and inspect all parts, removing all old grease

Ensure all shaft bearing shoulders and journals are free of nicks, dressing shaft with emery cloth or stone as necessary

Heat bearing to 250°F (120°C) for at least 30 minutes

Place bearing onto shaft ensuring contact with the locating shoulder without using impact force

Section 3 – Anti-Friction Bearing (Grease Lubricated) – Severe Conditions

Verify applicable motor conditions

Describe the operating conditions

Ensure lubrication procedure follows the 6 Monthly task guidelines

Check relubrication intervals and volumes on the main motor nameplate

Is the shaft stationary and motor warm?

Stay clear of rotating parts and electrical circuits if lubrication is done with motor running

Locate the grease inlet, clean the area, and replace the pipe plug with a grease fitting if necessary

Check that air filters are in place and clean

Measure the resistance to air flow of a clean filter

Is the resistance to air flow within the acceptable range?

Measure the static air pressure drop across the filters

Is the static air pressure drop within the acceptable range?

Check if the Differential Air Pressure Switch is activated

Clean or replace filters if pressure drop reaches threshold