WEG Electric Motor W22Xec 63

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.

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.

For lubrication, use only a manual grease gun.

The used grease must contain corrosion and oxidation inhibitors.

Oil viscosity and pH must be checked periodically.

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 the oven for drying process

Wound stator placed in oven heated to max. 120 °C for two hours

For larger motors, drying time extended as required

Stator allowed to cool to room temperature after drying process

Measure the insulation resistance again as described in item 5.4

Stator drying process repeated if required insulation resistance does not meet the values specified in Table 5.3

Warning: This procedure requires trained personnel with PPE!

The machine must be in a cold state and disconnected from the power supply.

The insulation resistance must be measured in a safe environment.

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

Is the environment safe for insulation resistance measurement?

It is recommended to insulate and test each phase separately.

Is each phase insulated and tested separately?

During the test of one phase, the other phases must be grounded.

Are the other phases grounded during the test of one phase?

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.

Motor disconnected from the power supply and is completely stopped?

Motor terminals inside the terminal box free of dangerous voltages?

Motor windings used as space heaters free of dangerous voltages?

Motor terminals free of dangerous voltages when driven by a frequency inverter even when the motor is completely stopped?

Enclosure surface cooled to ambient temperature before opening the terminal box and/or disassembling the motor?

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

Motor disassembled carefully without scratching machined surfaces or damaging threads?

Motor assembled on a flat surface ensuring a stable support base?

Visual inspection of the motor and coupling

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

Replacement of damaged parts as required

Measurement of the insulation resistance

Cleaning of the motor enclosure

Removal of oil spills and dust accumulation from the motor frame surface

Cleaning of motors with potential risk for electrostatic charge accumulation

Check cooling fan condition and clean the air inlet & outlet openings

Investigation of the actual condition of the seals and replacement, if required