WEG WEG Induction Motor W22 W22

Warning: All repair services on motors should always be performed by qualified personnel and in accordance with the applicable laws and regulations in each country.

Motor disconnected from the power supply and is completely stopped?

Warning: Dangerous voltages may be present at the motor terminals inside the terminal box.

Warning: Dangerous voltages may also be present at the motor terminals when they are driven by a frequency inverter, even when they are completely stopped.

Record the installation conditions such as terminal connection diagram, alignment, and leveling conditions.

Motor disassembled without causing scratches on machined surfaces or damaging the threads?

Motor assembled on a flat surface, ensuring a good support base?

Footless motors fixed or locked on the base to prevent accidents?

Motor handled carefully to avoid damaging insulated components such as windings, insulated rolling bearings, and power cables?

Warning: Only use the grease or oil types, amounts, and lubrication intervals recommended for the bearings.

Select the type of lubricant used

Enter the operating temperature of the motor

Warning: The maximum operating temperature of motors used in special applications may differ from those shown in Table 6.4.

Is the grease and oil disposal made in compliance with applicable laws?

Warning: Excess grease causes bearing overheating, resulting in bearing failure.

Enter the absolute temperature on the bearing

Note: This applies to motors running at rated speed, mounted in a horizontal position, and greased with Mobil Polyrex EM grease.

Is the motor running at rated speed?

Warning: Ensure the motor is switched off before starting the procedure.

Threaded oil drain plug removed

Threaded oil drain plug reinstalled

Amount of oil filled as specified on the nameplate

Oil level checked and is in the center of the sight glass

Warning: This inspection should only be performed by qualified and well-trained personnel. Ensure that the machine has stopped and is disconnected from the power supply, including accessory devices such as space heaters and brakes, before any servicing is undertaken.

Visual inspection of the motor and coupling. Check for abnormal noises, vibrations, excessive heating, wear signs, misalignment, or damaged parts.

Measure the insulation resistance according to item 5.4.

Clean the motor enclosure. Remove oil spills and dust accumulation from the motor frame surface to ensure better heat transfer to the surrounding ambient.

Check cooling fan condition and clean the air inlet and outlet openings to ensure free airflow over the motor.

Investigate the seal condition and replace them if required.

Drain the condensed water from inside the motor. After draining, reinstall the drain plugs to ensure the degree of protection as indicated on the motor nameplate.

Check the connections of the power supply cables, ensuring the correct clearance distance between live and grounded parts, as specified in Table 6.3.

If replacement is required, use only original components

Seal components cleaned before assembly

Joint sealant applied between bearing caps and end shields

Is the joint sealant compatible with the used lubricating oil?

Oil lubricant tubes connected as per Figure 6.12

Sign off on the lubrication procedure