Introduction: Repair a Fan That Won't Twis

In this Instructable, I wish show how I repaired an oscillatory pedestal fan of the type that is normally thrown and twisted away when it Chicago turning. You can normally get them working by applying lubricant to the ends of the motor but this alone works for a patc until the bearing scram seized again. I always figured that the construction of them didn't leave easy repairs. When the weather warm up this May, I was sweltering one Day and realizing that I still had this fan in the cellar, I idea I would see if I could localisation it. Upon taking it apart, I saw that it had metal bearings and lends itself same well to repair by anyone with a basic mechanical aptitude. The equivalent applies to desk fans although some might have cheaper structure than others, but they all are built with synonymous construction.

Supplies

1) Multi-use lubricating dirt. (hardware store)

2) Long nosed pair of pliers (ironmongery)

3) Multi-bit screwdriver (hardware fund)

4) Electrical solder and bonding iron. (ironware store)

5) Electrical tape. (ironmongery)

6) Rags or paper towels

7) Multimeter

8) Container of Methyl Hydrate

9) Hose clamp pair of pliers operating theater something twin

Stair 1: Start to Tear down

Take remove the front sentry duty of the fan cage and remove the fan blade aside turning the bridge player nut case clockwise to loosen IT. Behind the lover blade you will find another plastic nut the can be removed by turn IT counter clockwise. You might demand to use a pair of hose clamp plyers if it's too pixilated. Erst the nut is remote, you can remove the rump bodyguard.

Step 2: Disassemble the Plastic Motorial Covers.

Once the rear guard is inactive you are just nigh with the plastic motor covers. It comes separate in two halves. There is a screw that holds the rear piece to the motor and there are two screws that hold the front piece to the motor. These motivation to be removed. Pull off the on/off speed control assembly knob. The unusual pull-out knob is the stationary or side to face control. It testament require putt a flat blade screwdriver under information technology piece gently pulling up with your fingers to remove it. Once these control knobs are removed, the motor assembly can be seen spell silent connected to the standstill.

Step 3: Dismemberment the Motor and Checking the Capacitor

This motor is called a single phase, capacitance start, induction motor. The capacitor is the small Black box with the two wires upcoming out of it. The purpose of this is to create a stage deviation between the stator voltage and the rotor coil voltage. This voltage phase difference is called "slip" and creates the torque in the motor. If there was no capacitor, the motor would not turn. If you want to check this capacitor, you can check it with a capacity meter or use the ohms setting on your multimeter. Remove one of the wires. For 30 seconds put a snub crosswise the capacitor with a wire or gator lead to remove any residual voltage to protect your meter and put your meter connected at least the 1K setting and take in the capacitor tardily thrill up. If it doesn't, you know your condenser is bad. Replace with another non polarized capacitor or create your personal with two electrolytics with the two prescribed leads linked conjointly. The voltage rating should personify at least 250 volts or higher and the electrical condenser should be at to the lowest degree 4uF. If you are fashioning same yourself, make a point the ii electrolytics are at to the lowest degree 8 uF each because capacitance halves nonparallel. The motor case consists of quaternity pieces, the rotating piece called the rotor, the middle composition with the coils on it which is called the stator and the two end pieces with retain the bearings for the rotor. These all are held jointly with four screws. Ahead you take the motor apart you need to get rid of the pivoting arm which is held on by a know that connects to the nylon eccentric and also lease the green wire off of its screw connecting it to the case. Take these out and the motor comes apart like the envision. Attend to do this because the wires in the coils break easily especially where the top executive comes in from the outside of the motorial.

Step 4: Leave out Rotor coil and Clean Bearings

Lightly take out the rotor and clean both ends with methyl hydrate. Do the same to the aim that they fit into. Once immaculate and dry, coating both bearings with a stratum of grease. As wel clean inside of coils and make a point there is no debris in at that place. Also clean areas around bearings. Put assembly very carefully together examining wires for some breaks. One of the loop wires was broken near where IT connects to the incoming insulated wires. I soldered in a new wire and connected. Equally you are bringing wires together you might lack to put under a little of physical phenomenon tape around them to hold them together and isolate them. Put the rotor gently in the coil assembly and link the two bearing pieces to that with the four screws. Reconnect the pivoting piece to the nylon eccentric with the jockey and besides come this to the super electrify affiliated to the metal chassis by a nookie. Check to envision that the rotor spins easily in its bearings.

Step 5: Reconnect Capacitor and Ray-harmonize Plastic Covers

Re-solder any wires that have been removed from the capacitor and if it was necessary to re-spice any wires, do this now. take the plastic assemblies and confiscate them with the one screw on the oversized piece and two screws on the big plastic piece. Once everything is together, the fan assembly commode be mounted on the pedestal. Gently remount the two control knobs. Right away plug the fan in and make sure it works. Strain the distinguishable speeds and pull outgoing the oscillating control to make a point it deeds. If the oscillating chemical mechanism is sticking, gently help it along piece running the fan connected the lowest speed. Chances are it will work after being helped along awhile. leave the fan on for 30 minutes and so check for no lighted smell or unusual heat coming from the motor.

Step 6: Re-attach Rear Fan Guard, Fan Blade and Front Guard

Re-attach the rear fan guard with the finger nut making sure to not concluded tighten. The lover blade should forthwith be attached with the backwards hand egg. Now re-install the presence guard duty carefully. The repaired fan is now make out.

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