New shitty apartment

motor shaft holds the fan blades, one drop of light mineral oil each into where the shaft goes into the motor case. Grab the shaft and move it up and down to get the oil slide into the (plain) bearing. Spin by hand and add more oil if it is still not spinning easily.

replace with new exhaust fan if shaft is still hard to rotate

File: 1489384885550264164864.jpg (1MB, 2560x1536px) Image search: [Google]

1MB, 2560x1536px

Dammit sorry my stupid phone is posting these pictures facing the wrong way

>>1143816
ac induction motor. power flows through wire, makes magnetic field in the iron plates, spins the fan via the magnetic field formed.

>>1143820
Cool thanks one more question

Whats powering the motor? Just contact with the metal and copper?

>>1143822
By george DIY ur community is known throughout the internet for your nobility and honor

>>1143816
>just hum and do nothing

Can you spin the propeller freely? ( with the current turned off)
If no, grease the bearings.

If it spins freely with your hand, but still hums it could be the capacitor.

To check, turn the power on and "help" the propellor to start spinning. (Without losing a finger)

If its a problem with the capacitor, the motor should then kick in and start spinning as normal.

> If its a problem with the capacitor

these little induction motors dont have capacitors. the two most common troubles are (1) blown thermal fuses, and (2) seized shaft. since it hums, it has to be #2, and the solution is cleaning and oiling.

>>1143823
https://en.wikipedia.org/wiki/Shaded-pole_motor

>A shaded-pole motor is a small squirrel-cage motor in which the auxiliary winding is composed of a copper ring or bar surrounding a portion of each pole.[1] This auxiliary single-turn winding is called a shading coil. Currents induced in this coil by the magnetic field create a second electrical phase by delaying the phase of magnetic flux change for that pole (a shaded pole) enough to provide a 2-phase rotating magnetic field.

>>1143882
Could also be the bearings have too much play and allow the rotor to hit the stator. The rotor will turn by hand, but once energized, the magnetics will cause it to stick and just hum.

>>1143835
>It could be the capacitor

It's a tiny 120v bathroom fan. He even posted pictures you dense cunt.

It's clearly the bearings.

>>1144278
these always wear out over time. if it doesn't work after a cleaning or greasing then its toast. you can often find a replacement motor as they are pretty common. just get another one and swap it out.