Any c-frame motor experts? Jamestown exhaust blower rebuild.

[KNKN]

In the process of looking for an exhaust leak on my older model j1000 I decided to change out the ceramic blanket on the exhaust blower.

Well its turned into a huge ordeal because the exhaust fan blade was so crusted up with soot that I had a very difficult time getting it off. I ended up damaging the motor getting it apart. I blew the top part of the bearing retainer out of the cframe motor. I have put it back together with some JB weld and its back working again. But I thought this would be a good time to go ahead and change out the whole motor anyway. A replacement motor from Jamestown is $200 and a whole blower will cost me more than I paid for the complete stove! So I would prefer to find an aftermarket part.

The motor did not have any specs on it but I found these specs from another post on this forum with a similar year stove.

115V 60hz 25mhp cont duty
1PH Class B 3100 RPM .8AMP

I went to the local Graingers and they recommended this replacement motor.

(broken link removed)

It bolted up and was almost an exact match for everything. When I started it up though it would run for a few minutes and get hot and shut off. I returned the motor. They said it could be a bad motor but it also may not be getting the correct power input. I am not sure.

Any ideas on a good replacement for this motor?

 

[ironpony]

I use alot of these motors for Halloween props and suprisingly
there is a high rate of defective ones..............new out of the box
my odds are about 1 in 4

 

[SmokeyTheBear]

That replacement motor is only able to handle ambient air temperature of 40 °C (104 °F) your stoves enclosure likely exceeds that at that location.

Where the metal blades are it is a lot hotter.

 

[KNKN]

That replacement motor is only able to handle ambient air temperature of 40 °C (104 °F) your stoves enclosure likely exceeds that at that location.

Where the metal blades are it is a lot hotter.

I had noticed that on the fan specs but when testing I was not even burning anything in the stove and it shut down.

 

[SmokeyTheBear]

That replacement motor is only able to handle ambient air temperature of 40 °C (104 °F) your stoves enclosure likely exceeds that at that location.

Where the metal blades are it is a lot hotter.

I had noticed that on the fan specs but when testing I was not even burning anything in the stove and it shut down.

Then you have a DOA motor, it happens given QC at a lot of places.

 

[KNKN]

The ambient temp rating did have me worried but with the insulation blanket and fan and also two convection fans running in the back part of the stove it may keep it cool enough but I cant be sure.

I also found this motor that looks similar but the specs on it do not give me shaft measurements and its a little pricey... So I dont know

http://shortyshvac.com/index.php?main_page=product_info&cPath=31&products_id=38

 

[Northeaster2010]

Hi KNKN, j-takeman help me out with this checkout this thread or email him:

https://www.hearth.com/talk/threads/64620/

 

[SmokeyTheBear]

The ambient temp rating did have me worried but with the insulation blanket and fan and also two convection fans running in the back part of the stove it may keep it cool enough but I cant be sure.

I also found this motor that looks similar but the specs on it do not give me shaft measurements and its a little pricey... So I dont know

http://shortyshvac.com/index.php?main_page=product_info&cPath=31&products_id=38

Send mike an email and find out about the shaft lengths and any other questions.

 

[KNKN]

I found some more specs on it but I dont understand some of the measurements.

What is "Length Less shaft"?

H.P. 25 MHP
Speeds 1
Volts 115
Amps 1.80
Rotation CW
RPM 3300
Bearings Ball
Shaft Length (In.) 1 x 1 7/8
Stack Size (In.) 1 1/2
Motor Type Shaded Pole
Frame C-Frame
Overload Automatic
Phase 1
Shaft Diameter (In.) 5/16
Shafts 2
Hertz 60
Shaft Dimension (In.) 1 x 5/16 x 1 7/8
Length Less Shaft (In.) 3 3/8


My motor and the grainger are

Length Less Shaft (In.) 2-5/8
Shaft Dia. (In.) 7/32 and 5/16
Shaft Length (In.) 3/4 & 2
Stack (In.) 1-1/2
O.C. Mounting (In.) 1-7/8

 

[KNKN]

Hi KNKN, j-takeman help me out with this checkout this thread or email him:

https://www.hearth.com/talk/threads/64620/

Thanks. I will check it out!

 

[SmokeyTheBear]

If you subtract the shaft lengths from the overall length of the assembly you get the length of the part that has the coils etc ..

The unit has to both fit the impeller inside the blower on one end and the cooling fan on the other has to remain inside the stove enclosure. You can always easily shorten a long shaft but if the coil assembly is too long it can cause spacing issues.

 

[KNKN]

Ok so the Carrier motor seems to be taller.

Length Less Shaft (In.) 3 3/8
Length Less Shaft (In.) 2-5/8


Its a very tight fit inside that little stove so its probably not going to work. Gonna have to keep looking or get another one of the grainger models.

BTW thanks for your help Smokey!