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Duo-Therm AC bearing noise I have cleaned the fins, checked all nuts and bolts. tried to get some grease on the shaft. checked the squirel cage, still noise. Sometimes barely noticeable, sometimes louder. Can it be anything but the motor? 2001 Duo-Therm by Dometic 13500 with Heat Pump

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Yes, it sounds like your bearings are bad. If it is cooling, then you know the compressor is working.
The only other thing really, would be the motor.

Posted on Oct 02, 2009

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How do I fix a loose blade.


By loose blade I assume you mean that it can be moved up and down at the tip of the blade. It is most unlikely that the central nut has come loose, but check anyway. If this nut is tight and the shaft is loose in the bearing this means the bearing has worn out. Remove the deck from the machine. Photograph the run of the belt as this has to be removed. Also the direction of the grease nipple. Remove pulley from loose spindle. Turn deck on its edge or mount on two saw horses or similar so you can get to top and bottom of spindle bolts. Remove cutting blade. Remove spindle housing and clean area so no rubbish gets caught when reassembling. Otherwise spindle may be set different and mower will leave a line of differing cut. Take spindle to vise and remove any retaining nuts or circlips from shaft and clean as clean as new. Apply light oil or CRC etc to help move bearing along shaft. Open vise wider that outside of bearing, usually 44 to 50mm [1 3/4" to 2"] and refit nut on thread. Check nut is always spaced free of top bearing. With cushion of hardwood or nylon tap the shaft to move it down with lower bearing coming out of spindle housing. To remove top bearing from housing, turn housing up other way and use a wooden shaft such as a broom handle to tap bearing free of housing. Clean out grease and replace when reassembling. Do not reuse other bearing. They are cheap and likely to fail shortly anyway. These bearings usually have no seals on inside.

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Replacing bearinon spindle housing


Remove deck and place on two boxes or saw horses so that you can access both top and bottom of bolts holding spindle housing. Remove drive pulley from spindle. Remove cutting blade. Remove four bolts holding spindle housing to deck frame, noting which way grease nipple is pointing. Take spindle housing off and scrub deck frame clean of rust etc and also clean housing with wire brush. To remove bearings, look for retainers such as nuts or circlips. Remove these and ensure that the shaft is clean so bearing can be slid off. Apply CRC or light oil to assist bearing removal. Use a vise and set jaws wide enough that the bearing outside can fit between. This is usually 45 to 50mm. [1 3/4" to 2"] Place a hard wood block [or something that will not bruise the thread such as solid nylon] and screw nut well on to thread but make sure there is space for movement between nut and bearing. Firmly tap spindle end. Shaft should go down into top bearing and bottom bearing should start to emerge between vice jaws. Make sure that there is always space between nut and bearing before knocking end of shaft again. To knock top bearing out, place it on bottom over vise jaws and take a length of wood such as a section of broom handle and knock it out. Normally there should be no seals on the inside of these spindle bearings as they are greased from a grease gun thru the grease nipple.

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1 Answer

NOISY SQUIRELL CAGE ON A CARRIER AC/HEAT PUMP OUTDOOR UNIT


Not unless its a belt driven wheel. If not no grease will help just make a big mess. Take the fan assembly out, take motor off the wheel, take wheel out of the assembly wash wheel with hose, dry reassemble. Or just go buy a new wheel but check your shaft on the motor if loose get a new motor also.

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The AC unit up in the attic became very noisy few days ago. My husband went up the attic and he said the noise is comming from the fan it shakes very bad once the ac is on. What do you think that is the...


I would check the bearing on the fan motor .You can try to move blower back and forth and if it moves more than about 1/8 inch then you may need to replace the motor. Check the mounting bolts that hold squirrel cage in placeAlso check the bolt or set screw that holds blower to motor shaft to make sure it is not letting the blower move when the motor is running. I would clean the fan and motor as well as you can and oil motor if it has oil ports. Hope this helps you. Thanks

Jun 20, 2011 | Heating & Cooling

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How to replace rear wheel hub


Sodium based grease is not compatible with lithium based grease. Do not lubricate the wheel bearings without first thoroughly cleaning all old grease from the bearing. Use of incompatible bearing lubricants could result in premature lubricant breakdown.
  1. Raise and support the vehicle safely.
  2. Remove the wheels.
  3. Remove the brake drum or brake disc.
  4. Remove the hub grease cap.
  5. Remove the cotter pin retainer, adjusting nut and flatwasher from the rear wheel spindle. Discard the cotter pin.
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  7. Remove the rear hub from rear wheel spindle.
  8. Using Seal Remover (TOOL-1175-AC) or equivalent, remove and discard the oil seal.
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  10. Clean the inner and outer bearing cups with solvent. Inspect the bearing cups for scratches, pits, excessive wear and other damage. If the bearing cups are worn or damaged, remove them using a Bearing Cup Puller (T77F-1102A) or equivalent.
To install:
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  2. If the inner or outer bearing cups were removed, install replacement cups using Bearing Cup Replacer (T73-1202-A) or equivalent. Seat the cups properly in the hub.
If a bearing packer is not available, work as much grease as possible between the rollers and cages. Grease the cone surfaces.
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  3. Install the retainer with Hub Seal Replacer (T83T-1175-B) or equivalent. Be sure the retainer is properly seated.
Keep the hub centered on the spindle to prevent damage to the retainer and spindle threads.
  1. Install the hub assembly on the spindle.
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  4. Install the new cotter pin.
  5. Install hub grease cap.
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1 Answer

How do I install a blower motor in a duo therm model 57915.622? What tools will I need?


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1 Answer

How does the squirrel cage come off of the blower motor shaft, I am replacing the motor it,s shot.


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1 Answer

My Duo Therm Brisk Aire has a bearing going out on the fan motor. What is the best way to get the motor out? Having trouble getting in to get the squirrel cage off of the motor shaft. Thanks Rick


    Here is what we do:    If possible, we take the whole thing out; motor and fan blades together. Then we sand down the exposed part of the shaft. put penetrating oil on as much as the shaft we can reach. Loosen the set screw(s). If the shaft has a flat on it and you have the room put a cresent wrench on the exposed shaft while moving the squarle cage back and forth. on the shaft, working in the oil.  Put more oil on the shaft and slowly twist it off onto the shaft you have polished with the emery paper.     Baring that working, you still have two options. Take the motor to an electricial motor rrepair place . They can get you a replacment motor usually cheeper that anyone else. Thy likely can also get you the sqirrell cage fan or you can hack saw the shaft from the back(motor) side and take the shaft off that way. This should be a last resort as you may be able to disassemble the motor and Grease the bearings, and place the same motor back into service. I hope this helps.

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