WEG Electric Motor W22Xec 80

Warning: Proper lubrication plays a vital role in motor performance

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

Lubrication procedures must be carried out according to the type of lubricant (oil or grease)

The grease and oil disposal should be made in compliance with applicable laws in each country

Please contact WEG when motors are to be installed in special environments or used for special applications

Excess grease causes bearing overheating, resulting in bearing failure

For special applications such as high and low temperatures, aggressive environments, or driven by frequency inverter (VFD), contact WEG about the required amount of grease and relubrication intervals

Motor disassembly must be carried out as specified in Item 8.3

If motors are fitted with shielded or sealed bearings (ZZ, DDU, 2RS, VV), these bearings must be replaced at the end of the grease service life

Warning: This procedure requires trained personnel with PPE!

Is the machine in a cold state and disconnected from the power supply?

If machine is not disconnected, stop the procedure and disconnect it from the power supply

Is the environment safe for insulation resistance measurement?

If environment is not safe, stop the procedure and ensure safety

Are all external devices disconnected and grounded?

If not, disconnect and ground all external devices

Measure the insulation resistance one minute after the voltage has been applied to the winding

Ground the terminals before and after each measurement

Warning: All repair services on motors for use in hazardous areas must be performed by qualified personnel and in accordance with applicable laws and regulations.

Always use proper tools and devices for motor disassembly and assembly.

Disassembly and assembly services may only be carried out after the motor has been disconnected from the power supply and is completely stopped.

Dangerous voltages may be present at the motor terminals inside the terminal box since capacitors can retain electrical charge even when not connected to a power source.

Dangerous voltages may be present when space heaters are connected to the motor or when motor windings are used as space heaters.

Dangerous voltages may be present at the motor terminals when driven by a frequency inverter even when the motor is completely stopped.

For enclosure-protected motors, open the terminal box and/or disassemble the motor only after the enclosure surface has cooled to ambient temperature.

Record installation conditions such as terminal connection diagram and alignment or leveling conditions before starting disassembly.

Use these records for later assembly.

Warning: This procedure requires trained personnel with PPE!

End shields, rotor with shaft, fan cover, fan and terminal box removed

Wound stator with frame transferred to oven

Stator placed in oven for two hours

For larger motors, a longer drying time may be required

Stator cooled to room temperature after drying

Visual inspection of the motor and coupling

Check for abnormal noises, vibrations, excessive heating, wear signs, misalignment or damaged parts

Insulation resistance measurement

Oil spills and dust accumulation removed from the motor frame surface

Motors with potential risk for electrostatic charge accumulation cleaned with a damp cloth

Cooling fan condition checked and air inlet & outlet openings cleaned

Condition of the seals investigated and replaced if required