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7 of 7 people found the following review helpful
Broan Attic Fan (340, 343, 350, 353) Replacement Motor # 97009316

Having removed our 9-year old Broan attic fan for a remodeling project, it was obvious that the fan blade didn't turn as easily as when it was new. However, rather than buy a replacement motor, I simply cleaned the bearings on the old one. Some notes:

- Our fan's motor has a 3-prong cord plugged into a dedicated receptacle next to it, which simplified removing the unit. We have 3 attic fans and I always install a short heavy-duty extension cord on the fan and mount a receptacle nearby - to simplify maintenance.

- Removed the fan blade and unloosened two of the three bolts that held the motor clamp tight.

- Removed the two screws that held the thermostat on the fan frame and removed the motor & thermostat together.

- Removed the nuts and bolts that hold the 2 halves of the motor housing together.

- Separated the motor casing ends - the armature then comes out easily, along with the front motor casing.

- Since the long shaft was rusted beyond where the fan attaches, I used a bench mounted wire wheel to de-rust it. A rusted shaft won't slide out of the front bearing.

- Slid the front motor casing, which contains the front sleeve bearing, off the armature shaft.

- Thoroughly cleaned the gunk on the shaft at the bearing locations using a paper towel with paint thinner, along with steel wool. The front shaft on my motor was coated with what looked like tar, which can happen to oil that's repeatedly over-heated. This "tar" retards motor RPM's, making the fan less efficient. Eventually, if it slows the motor enough, a tar build-up could result in a burned out motor. The rear bearing area was much cleaner.

- Cleaned the inside of the sleeve bearings.

- Oiled the sleeve bearings on their insides and the shaft where it touches the bearings, with synthetic motor oil, since it's slicker and has a higher operating temperature range, than refined oil.

- Reassembled the unit - mounting the motor so that the shaft was at a right angle to the fan housing. The fan turned much easier by hand than it did before. Electrified the fan for a test run before re-installation, to ensure proper operation.

Summary:

I've disassembled many motors and this is the first one with STEEL versus bronze, sleeve bearings. Broan probably saves two bucks per motor by using the cheaper steel sleeve bearings, and the end result is a motor won't last as long as it would if bronze bearings were used. (I.e., the bearings gum up, at which point, most people would replace the motor.) The steel sleeve bearings are so hard that the motor shaft showed some wear at the front bearing area - this is something I haven't seen with bronze bearings, since bronze is not hard enough to wear down a steel shaft.

This "repair" costs nothing and took about 30 minutes. There's no reason it couldn't be repeated as needed.

One star off for Broan using cheaper bearings.
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3 of 3 people found the following review helpful
on August 24, 2011
Verified Purchase
This motor is identical to the Lomanco motor I was replacing but is more expensive. Even the part numbers are identical. The only difference is that this motor is more expensive.

I was hoping it would be a better motor since the thermal protector in my Lomanco motor burned out and it uses sleeve bearings.
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3 of 3 people found the following review helpful
on July 9, 2013
Verified Purchase
This motor works as a replacement, but has the same steel sleeve bearings as the original that will require regular lubrication (yearly, at least) to keep them from seizing and burning out the thermal fuse. The problem is, you have to disassemble the fan to had a couple drops of oil to the motor bearings.
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2 of 2 people found the following review helpful
on July 20, 2012
My original installation was not Broan but a Chinese knockoff. I was able to re-install from inside the attic. To fit my mounting/clamping brackets, I had to mount a new Broan blade as far away from the motor housing as possible (i.e. very tip of the shaft). The new motor and blade run much quieter, and the new Broan blade moves more air. To help reduce fan noise and vibration being transmitted to the house, I plan to add some 1" neoprene strips between the motor housing and the mounting/clamping brackets. Motor size and dimensions were identical to original Chinese OEM motor. This motor can be found cheaper on Amazon and the internet.
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2 of 2 people found the following review helpful
on August 18, 2013
Verified Purchase
I have had this attic fan for years, it has always performed well. One thing that would be helpfull is permanently sealed bearings. These motors are usually in the attic, where they are forgotten and never oiled.
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1 of 1 people found the following review helpful
on March 4, 2013
Verified Purchase
Best price and just what I was looking for.
This was purchased as a replacement part for a 25 yr old attic fan and it worked.
The descriptive detail was enough that I could determine the compatibility.
Thanks!
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1 of 1 people found the following review helpful
on August 27, 2013
Verified Purchase
My old fan was making all sorts of noise and finally just burned out. I ordered this one, installed it and it runs effectively and quietly. I am guessing I will have to replace it in 7 to 10 years but it is what it is.
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1 of 1 people found the following review helpful
on November 27, 2011
Verified Purchase
This is the best replacement Motor
I tried to purchase one from Home Depot is cost more.
good service as usual I am very happy with it
Thank You
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1 of 1 people found the following review helpful
on September 1, 2013
Verified Purchase
The original motor in the fan lasted for nearly 14 years. My hope is the new motor lasts a similar period of time. Only time will tell.
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1 of 1 people found the following review helpful
on December 29, 2012
Verified Purchase
This was an exact replacement for the original motor that went bad. That made it an easy fix to be back in operation.
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