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An induction motor is an electric motor that uses electromagnets, and they are typically used in appliances like fans, refrigerators, and air conditioners. If you detect an appliance'due south consecration motor vibrating or if the motor doesn't piece of work at all, it may exist time to supplant the bearings within. A motor'south bearings reduce friction to help the machine run smoothly and quietly, just they will fail if they're old. While it tin can be a time-intensive process that requires you to take apart the motor, you may still replace the bearings on your ain in a few hours. Notwithstanding, changing the bearings in a motor tin be difficult if you don't have the proper tools, so don't hesitate to contact a professional if y'all need to.

  1. i

    Unplug the apparatus and disconnect the motor. If you still take your motor plugged in or fastened to an appliance, unplug the power cord. Exit the motor unplugged throughout the entire time you lot're working so y'all don't hurt yourself. Look for any wires attached to the side of the motor and unplug the box-shaped connector holding them there. Disengage any bolts holding the motor within of the appliance with a wrench and so you can take the motor out.[1]

    • Never work on your motor while information technology's still connected to power since y'all could go electrocuted.
    • The process for removing the motor will vary depending on what apparatus you're working on. Refer to your appliance'due south user manual to determine the best way to disconnect the motor.

  2. 2

    Remove the fan comprehend and fan from the end of the motor with a ratchet. Look for the finish of the motor that's enclosed and has vents. Locate the bolts around the summit and bottom edges of the cover and loosen them with your ratchet. Gear up the embrace aside to expose the fan underneath it. Use your ratchet or a screwdriver to detach the fan from the motor's main body.[ii]

    • If y'all have trouble turning the bolts on the encompass or the fan, try lubricating them with WD-40 to aid loosen them.
    • Screw the bolts back into the holes when you finish taking the encompass off then you don't lose them.

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  3. 3

    Mark the superlative of the motor's cease caps and the principal housing along their seams. The end caps are the metallic housings that protect the internal electronics of your motor, just it can be hard to tell which way to reinstall them later. Observe the seams between the cease caps and the motor's main body. Depict a line with your mark then it crosses over the seam. That way, you tin can line up your marks when you put the cease cap dorsum on.[3]

    • You don't accept to marker the pinnacle of the terminate cap if you don't want to.

    Variation: You lot may likewise utilise a center punch to marking the top of your end cap. Place the tip of the punch on top of the end cap and hit information technology with a hammer 1–2 times. The punch will leave a small dent in the metal without dissentious the motor.

  4. 4

    Unscrew the nuts from the threaded ends of the tie rods. The tie rods are the long horizontal bolts that agree the finish caps on your motor. Check each end cap for 4 nuts that are screwed onto the threaded tie rods. Employ a ratchet or wrench to loosen the nuts and accept them off of the tie rods.[four]

    • Typically, you'll observe the threaded ends of the necktie rods on the same side of the motor every bit the fan.
    • But one of the end caps volition have basics. The other end cap will have fixed bolts instead.

  5. 5

    Pull the tie rods out from the motor. Once yous take off all of the nuts, grab one of the bolts on the other end cap. Carefully pull the necktie rod straight out from the motor and set information technology aside. Then remove the rest of the bolts the same way.[5]

    • Spiral the nuts dorsum onto the tie rods and then you don't lose them.

  6. 6

    Tap the end caps off of the motor with a expressionless accident hammer. A dead blow hammer is a mallet coated in rubber and so it doesn't leave impairment or dents when you apply it. Identify the edge of your hammer against the end cap'southward seam correct behind the hole for the top left nut. Lightly hit the end cap away from the motor 3-iv times to help loosen it. Switch to the lesser correct hole and tap your hammer in that location. Alternate between hitting the end cap from opposite sides until information technology pops off. Then repeat the process on the finish cap on the other side.[six]

    • Avoid using a metal hammer since you could possibly impairment the internal components of the motor.

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  1. i

    Clean the motor's shaft with a degreaser. You can use any chemical spray degreaser on your motor. Locate the horizontal metallic shaft running through the middle of the engine and spray the exposed ends with your degreaser. Permit the degreaser sit for 5–x seconds before wiping it off with a store cloth.[seven]

    • You can buy a spray degreaser from your local hardware shop.

  2. 2

    Secure a bearing extractor on the back of one of your bearings. Locate the silver donut-shaped bearing attached to one end of the shaft. Set the center pole of the extractor on the finish of the shaft and then its claw reaches toward the bearing. Plough the adjustment knob on the extractor to open the claw so the bearing can fit inside of it. Tighten the knob once more so the claw closes around the bearing. Make sure the tips of the claw touch the bearing'due south inner ring, or else yous could damage your motor.[viii]

    • You can purchase a bearing extractor online or from your local hardware store.
    • Bearings fit tightly on the motor'south shaft so you usually cannot remove them without an extractor.

  3. 3

    Turn the extractor'south handle with a wrench to pull the bearing off the shaft. Locate the handle at the end of the extractor that attaches to its centre pole. Grip the handle with a wrench or ratchet and plow it clockwise. As you tighten the handle, the center pole will go longer and force the begetting off of the shaft. Keep turning the handle until the bearing hands slides off the shaft.[nine]

    • If the begetting even so doesn't move, attempt spraying the shaft with WD-40 or some other lubricant to assist loosen it.
    • If the motor's shaft too rotates when you turn the handle, try belongings it nevertheless with your other paw or a wrench. Otherwise, the extractor may not piece of work properly.

    Tip: If yous accidentally remove the spacer washer behind the bearing, slide information technology back onto the motor'south shaft so you don't lose them.

  4. 4

    Repeat the process on the second bearing. Turn the motor around and then you tin can have the bearing off of the other side. Secure the extractor around the 2nd bearing so the center pole presses against the end of the shaft. Rotate the handle clockwise to pull the begetting directly off of the shaft.[10]

    • Salve at to the lowest degree 1 of your bearings and so yous can ensure yous buy the aforementioned size replacements. Otherwise, you can recycle them or take them to a local scrapyard.

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  1. i

    Buy new bearings that are exactly the same size and blazon as the old ones. You can buy bearings for your motor online or at your local hardware shop. Bring i of the old bearings with you lot so you lot tin compare the sizes and types. Typically, bearings are sold in pairs only you may have to buy them separately.[11]

    • Check the main body of the motor for a sticker or banner since it may list the bearing sizes you lot need.
    • Avoid using bearings that are the incorrect size or type since they could damage your motor or crusade information technology to piece of work inefficiently.
    • Keep your bearings in their packaging until you're ready to install them so they don't get dirty.

  2. two

    Oestrus the bearing on an induction heater until it'south 70–120°F (xx–50°C) warmer. Bank check the temperature of the bearing with a laser thermometer and write down the measurement. Put the heating rod from the induction heater through the centre of the begetting and permit information technology warm up. Check the brandish on the heater or use your thermometer every 30–60 seconds to see if the bearing is 50–70°F (20–fifty°C) warmer than its initial temperature. If it is, plow the heater off.[12]

    • Only rut 1 bearing at a time since the other may cool downwardly before you have a chance to install it.
    • Y'all tin can purchase an induction heater specifically made for bearings online or at your local hardware store.
    • Avoid heating your bearings whatever hotter than 250 °F (121 °C) since y'all could impairment them.
    • Heat helps expand the bearing's inner band so it's easier to slide onto the motor's shaft. Otherwise, the begetting may be as well tight to slide on.

    Variation: If you don't have an induction heater, you lot tin also utilize an oil bath. Fill a container with oil that has a flash point to a higher place 482 °F (250 °C) and oestrus it so it'south around 175–250 °F (79–121 °C). Put the bearings in the oil and let them heat upward completely. Be extremely careful since oil is extremely combustible and will burn if it splashes on y'all.[thirteen]

  3. 3

    Put on heat-resistant piece of work gloves. Since the begetting will exist extremely hot, don't bear on information technology with your blank hands. Cull a thick pair of heat-resistant work gloves and then you tin can safely handle the bearing without called-for yourself.[xiv]

    • If you don't have gloves, only utilise pliers or tongs to handle the begetting.

  4. 4

    Button the bearing onto the shaft until it touches the washer. One time the bearing heats upwardly, carefully pull out the heating rod and gear up it aside. Pick upwardly your begetting and guide it onto the shaft on either stop of the motor. Push the bearing all the fashion onto the shaft until it presses tightly against the washer.[xv]

    • Y'all do not need to lubricate the shaft earlier putting the bearing on.
    • If you used an oil bath, wipe the bearings clean before you install them on the motor.

  5. 5

    Use a begetting installation tool to move the bearing if it doesn't slide on easily. Even if you rut the begetting, sometimes it may get stuck on the motor's shaft. Position a begetting installation tool, which looks similar a long tube with a round stop the same size as your bearing and so information technology'south pressed apartment against the forepart of the bearing. Tap the other end with your expressionless accident hammer to force the bearing into position.[16]

    • You lot tin buy a bearing installation tool kit online or from your local hardware store.
    • Yous can besides use a bearing installation tool if y'all don't estrus the bearing, though information technology will take more than time to install.

    Warning: Never hit the bearing direct with a hammer since y'all tin damage it easily.

  6. half dozen

    Estrus and install the second bearing on the other side of the motor. Put the heating rod through the heart of the second begetting and allow it to warm upward. Once it's 50–70°F (20–fifty°C) warmer, take it off of the heater and slide it on the shaft on the other end of the motor. Make sure the bearing presses firmly against the washer.[17]

  7. 7

    Let the bearings cool down earlier reassembling the motor. Avoid moving the motor effectually since the bearings are notwithstanding loose and may slide out of position. Leave the bearings until they experience cool to the touch. In one case they are, screw the stop caps, fan, and fan cover back on the motor![18]

    • Information technology will typically accept 30–60 minutes for the bearings to cool down.

  8. viii

    Reinstall the motor in your apparatus and plug it in. Identify your motor back in the appliance and commodities information technology back down then information technology doesn't motility around. Plug the wire connector dorsum into the side of the motor so power runs through information technology again. Once you lot take everything installed, plug the apparatus into a power outlet and you lot're finished!

    • If the motor notwithstanding doesn't work, you may need to rent someone to come up and repair it.

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  • Rent a repair person if you don't feel confident changing the bearings on your motor by yourself.

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  • Never accept apart an induction motor while information technology'southward still continued to power since you lot could stupor or electrocute yourself.

  • Avoid hitting any bearings straight if they tin't push them all the way on, or else you may damage them.[19]

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Things Yous'll Need

  • Wrench or ratchet
  • Dead blow hammer
  • Degreaser
  • Shop cloth
  • Bearing extractor
  • Bearings
  • Digital thermometer
  • Induction heater
  • Heat-resistant gloves
  • Bearing installation tool
  • Wrench

References

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