EFM Motor Noise

EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 10:36 am

Hello,
here is a link to a noise my motor is making,
tell me what you think
Thanks Ken

http://www.youtube.com/watch?v=pgwa4FRO7CI
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: Rob R. On: Thu Dec 29, 2011 10:50 am

The ratchet assembly sounds like it is running slower than normal. Have you ever oiled the motor?
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 10:54 am

Hello,
yes I tried that, the feed rate is set to 3 teeth, what do you mean slow??
Thanks Ken
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: Wood'nCoal On: Thu Dec 29, 2011 11:12 am

Did you check the oil level in the gear reducer?
My stoker runs faster, at 4 teeth I can't count the clicks, it may just be the video is running slow,
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 11:37 am

Hello,
i dont think the video is slow, what would make it run slow? is it running backwards??
Thanks Ken
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 11:39 am

kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: Rob R. On: Thu Dec 29, 2011 11:48 am

With the power off and the drive pawl flipped up, try spinning the fan coupler by hand...does it spin freely?

Wood'nCoal wrote:Did you check the oil level in the gear reducer?


Well?

It almost sounds like it makes that noise when the crank is in a certain position. Time to pull the motor off and see what spins easy and what doesn't.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 11:57 am

The oil level seems low, mabe i will change it, what yould you guys suggest??
Thanks Ken
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: Rob R. On: Thu Dec 29, 2011 12:25 pm

Ken, you still need to narrow down what component has the problem. I could see no oil causing issues, but just being a little low seems like an unlikely cause.

Rob R. wrote:With the power off and the drive pawl flipped up, try spinning the fan coupler by hand...does it spin freely?


Have you gone through that exercise yet?

As for the oil, I was just discussing this with another EFM user this morning. A traditional gear lube is what I suggest, 75w90, 80w90, etc. The exact viscosity isn't critical since this is a low load and fairly steady temperature application, but you should pick a gearlube that meets/exceeds an API rating of GL4/GL5. If you can spare the extra $10 or so, a synthetic oil is a good idea.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: EFM Motor Noise

PostBy: Wood'nCoal On: Thu Dec 29, 2011 12:28 pm

90 weight oil in the gear reducer.
Pull the motor and run it off the stoker and see what it sounds like. It should spin freely. It sounds like the noise is from the motor.
Here's my stoker running:
0001.wmv
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[nepafile=32132]0001.wmv[/nepafile]

Runs a little faster.
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 1:55 pm

Hello,
I found the rubber piece between the motor and gearbox to have some play, lubed it now its gone
Shound there be some free play in the rubber ???
i still dont know why im spinning slow, any ideas??
Thanks Ken
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 2:22 pm

Anybody know which way the bottom arm should turn clockwise or counterclockwise?????
Thanks
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75

Re: EFM Motor Noise

PostBy: Rob R. On: Thu Dec 29, 2011 2:29 pm

Counterclockwise. Mine takes 20 seconds to make 10 revolutions...I just timed it.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: EFM Motor Noise

PostBy: Wood'nCoal On: Thu Dec 29, 2011 2:34 pm

You have a crank ass'y on the output shaft of the gear reducer that has an elongated slot where the connecting rod attaches. If you compare the position of the connecting rod on your stoker to the position of the connecting rod in my video you will see that on my stoker the rod is positioned farther out from the center. If you move the rod on your stoker farther out the stoker will speed up. Since this will increase the connecting rod travel it will also increase the number of teeth engaged, so you'll have to readjust the drive pawl.

This looks like a rebuilt unit. Where did it come from?
Wood'nCoal
 
Stoker Coal Boiler: 1959 EFM 350
Hand Fed Coal Stove: Harman Magnafire Mark I
Coal Size/Type: Rice and Chestnut
Other Heating: Fisher Fireplace Insert

Re: EFM Motor Noise

PostBy: kenny007 On: Thu Dec 29, 2011 10:33 pm

Hello,
Took the motor off and found that the fan moved back on the shaft, closer to the motor
brought out the fan on the shaft about 1/2 inch all seems ok now rubber connector now seems tight
thanks everyone for the info...
ps What are you boiler temps when sitting after a long 20-30 burn???
Thanks Ken
kenny007
 
Stove/Furnace Make: Stratford, Chappee
Stove/Furnace Model: SC-75