Baldor Reliance Electric Motor 10840-SB-HV

Section 3 – Anti-Friction Bearing (Grease Lubricated)

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

Check motor nameplate for relubrication intervals and volumes

Ensure grease is clean and from clean containers

Verify grease compatibility if mixing different greases

Ensure motor is not over-lubricated to prevent premature bearing failure

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

Section 3 – Checking Insulation Resistance

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

Record the insulation resistance value

Investigate and take corrective action if there is a significant change in insulation resistance

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

Is the insulation resistance less than the calculated RM?

Dry out the windings if insulation resistance is less than RM

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

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

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

Identify extreme conditions present

Follow lubrication procedure as for the 6 Monthly task

Check relubrication intervals and volumes on the main motor nameplate

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

Is the shaft stationary and motor warm?

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

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 – 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 the 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