At the point between the fan motor and the impeller a squeak has developed, and at times the lack of lubrication there has caused the motor to slow way down. Upon sliding the unit out, and manually moving the fan blade, I feel quite a resistance. I have managed to apply some WD-40 to the shaft at that location, but it doesn't last too long, and I have to re-apply the oil again. Is there a better way to apply lubrication to that particular point?
Never even think WD-40 is a lubricant oil! 3-in-1 in the black/white or red/white can won't work either, it will gum up and turn to varnish very quickly. 3-in-1 electric motor oil in blue/white can might work, but I won't risk it. Use SAE 20 or ISO 68 non-detergent oil ("turbine" oil, machine oil, compressor oil, hydraulic oil, are all OK, but "gear" oils are too sticky). "Zoom Spout" oil is OK, is a lot cheaper, but a little thin (SAE 10, ISO 32); this is not a bad thing, if you can't flush out the old gunk, a little thinner oil may even things out. Don't use engine oils, they are for cars.
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Remove the guard, remove the fan blade. Lay the fan on its back and drip 4 drops of 3 in 1 Oil down the spindle. Turn the spindle by hand about 6 turns and leave it overnight with the spindle upwards. The next day, run the fan with the blade off and see if the squeaking has stopped. If it has, replace the blade and guard.
If it is still squeaking, it is the bearing at the other end of the motor. That one is not quite so easy to lubricate and usually the motor would need to be fully stripped down, cleaned and lubricated.
Vornado makes several fan models. Whether yours has ball bearings, sleeve bearings or another type is unknown. Most manufacturers of consumer grade fans use "permanently lubricated bearings" and require no additional lubrication by the owner "for the life of the fan".
If yours does accept lubrication, you should find a "filler neck" at the front and rear of the motor housing - directly over the motor's shaft (that the fan blade is attached to). A few drops of a light bodied machine oil in each should quiet the squeaking sounds (if coming from the bearing). If there is no such filler neck on the fan, you could unplug the fan and rest it on its back - fan aimed straight up. Squirt a couple drops of oil on the shaft - close to the motor. Because the fan is pointed straight up, gravity will draw the oil down the shaft into the bearing. You may not be able to access the shaft at the rear of the motor without some dis-assembly however. You should not attempt dis-assembly if you're not sure how to go about it. After the oil has run into the bearing, you should spread out newspaper or rags under the fan(or better yet - brought outside - before powering it on, as some oil may be cast off the shaft if it spins fast enough or if there was an excessive amount of oil applied to the shaft.
Possible lack of lubrication or accumulation of dirt. It is best to remove panel and check for dirt, if so a good wash before lubrication of the FAN and moving parts must solve this issue. Use a degreasing spray like WD40 on the motor shaft and fan.
These problems normally point to component wear, lack of lubrication. or an
incorrect adjustment. You must inspect and test the steering system to
locate the source of the trouble. just make sure the parts on front end are lubricated. check the front struts, sometimes if the upper plate goes bad, it will make noises. just check it out. you will find the squeaks !
Several things besides lack of lubrication can cause the problem.
One or more of the fan blade irons may be loose. As well as the wooden blade itself. In both cases a Phillips screw driver will solve the problem.
The pull chains are clicking against the the fan. I've see this happen many times. Simply putting some tape around the chain, where it touches the fan, will generally silence it.
And last, but not least ... The fans may be out of balance. But, this may be due to loose screws in the fan blade irons.
As far as lubrication is concerned. Older unit (10 to 15 years) have sealed motors that were to be permanently lubricated. Even some of today's brands and models are too. At best, if none of the above silenced the ticking, is to use a little WD40 with a straw nozzle up into the fan housing. Be careful doing this as the WD40 may drip. Be sure the wall switch for each fan is OFF, before attempting this.
Hope this helps you and thanks for choosing FixYa.
You will need to disassemble the pump and check the impeller. remove any debris and try turning the impeller by hand. If it does not move or is dragging, you will need to overhaul the pump. Possibly a shaft seal leak has damaged the motor bearing(s). Replace the shaft seal and motor bearings. If the motor is badly deteriorated, you might need to replace the motor. Note... the impeller turns counterclockwise to loosen. you may need special tools to grip and hold the motor shaft and the impeller to prevent damage to the impeller. If the impeller is seized on the shaft from rust, you may have to break it to get it off. reassemble with teflon lubricant on the shaft threads when reinstalling the impeller. This will prevent seizure later.
Hard water particles will build up in the fan bearings and cause the squeaking. Unplug the thing, and locate the fan motor(s). Place a few drops of 3-in-1 oil on the bearings where end of the shaft is mounted on the motor. This will lubricate motor, making not only run quieter, but faster, cooler, and more efficient.
If the fan is fairly new, remove it and return it to Home Depot. It is almost certainly something that has fallen down into the motor and is rubbing loudly enough to make a squeak as the fan runs faster.
The fan itself has sealed lubrication and you don't have to lubricate it.