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05-27-2018, 06:42 PM
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#1
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Member
Join Date: Jun 2013
Location: Tallahassee, FL
Posts: 97
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Coleman Mach fan motor replacement
I have a 21' Flagstaff MicroLite FBRS. It has an Airxcel Coleman Mach AC in it. My fan is still working fine but I can hear a bearing becoming not a happy camper. It still glides for a good bit after it turns off. First is there any way to lubricate this thing? And if not, does anyone know a direct replace and a good place to get one? I have attached a picture of the motor tag and another of the assembly. thank you!
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2014 Flagstaff 21FBRS
2013 Toyota Tundra 5.7
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05-27-2018, 07:05 PM
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#2
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Senior Member
Join Date: Dec 2015
Posts: 241
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Quote:
Originally Posted by Skeetzee
I have a 21' Flagstaff MicroLite FBRS. It has an Airxcel Coleman Mach AC in it. My fan is still working fine but I can hear a bearing becoming not a happy camper. It still glides for a good bit after it turns off. First is there any way to lubricate this thing? And if not, does anyone know a direct replace and a good place to get one? I have attached a picture of the motor tag and another of the assembly. thank you!
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Skeetzee, you may be able to oil the motor shaft on both sides of the motor. You will probably need a penetrating oil then some 3 In 1 oil. Unfortunately those type motors do not have replaceable bearings, just the cast brass slip bearing. If you can get oil into it, you may be able to get a few more seasons out of the motor. Once it seizes to the shaft, it's time to replace.
You should be able to get a replacement blower motor at an A/C supply business. You will need the H.P. size, the RPM and the Voltage & FLA. The new one will likely come with the start/run capacitor(s) and instructions on how to wire it up. Also you may have a couple of extra wires to reverse the motor rotation direction (CW or CCW).
The change out isn't difficult, just turn off the power and unbolt/re-bolt and unplug/re-plug wires to the motor. I replaced my condenser blower motor last spring on my 4 ton heat pump and it cost less than $100.
Good Luck on the repairs .... Swampy
__________________
Jim (Swampy), Susie, Jimmy & The Chihuahua Crew
2008 Chevy Silverado LS, 4.3L, V6, 2WD, 3.23:1
2014 287 BHBE; 1981 JayRaven: Predator 3500i - Call Home Pearl River, Louisiana. on The Honey Island Swamp
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05-27-2018, 08:57 PM
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#3
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Member
Join Date: Jun 2013
Location: Tallahassee, FL
Posts: 97
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thank you..I know once it seizes it is toast..It is really still turning very freely still. I had it pretty much apart today and it looks easy to replace especially if you have 4 hands. Have to be careful not to punch the shaft through the cooling fins.
I assume the capacitor should be changed if the motor is changed..
You say use 'some penetrating oil then some 3 in one'..do you mean 2 different oils?
__________________
2014 Flagstaff 21FBRS
2013 Toyota Tundra 5.7
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05-27-2018, 09:15 PM
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#4
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Senior Member
Join Date: Dec 2015
Posts: 241
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Quote:
Originally Posted by Skeetzee
thank you..I know once it seizes it is toast..It is really still turning very freely still. I had it pretty much apart today and it looks easy to replace especially if you have 4 hands. Have to be careful not to punch the shaft through the cooling fins.
I assume the capacitor should be changed if the motor is changed..
You say use 'some penetrating oil then some 3 in one'..do you mean 2 different oils?
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If the 3-in-1 oil soaks in, you won't need any penetrating oil. I was suggesting the penetrating oil in case the thicker oil would not flow into the bearing. Yes, if you replace the motor it will usually come with a capacitor in the box. Capacitors are usually the least dependable electrical items with motors. If they fail, the motor locks rotor and overheats burning the windings. I believe your picture of the nameplate shows a 2.5 micro Farad capacitor. Chances are if you buy from Coleman, the capacitor may be extra. You will get the best price from an A/C supply house with a generic motor. If you do end up replacing it, bring the old motor with you when you go to the supply house and they can double check to match up the generic motor for you.
Good Luck ..... Swampy
__________________
Jim (Swampy), Susie, Jimmy & The Chihuahua Crew
2008 Chevy Silverado LS, 4.3L, V6, 2WD, 3.23:1
2014 287 BHBE; 1981 JayRaven: Predator 3500i - Call Home Pearl River, Louisiana. on The Honey Island Swamp
https://www.forestriverforums.com/at...pic81807_1.gif
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05-27-2018, 09:26 PM
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#5
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Senior Member
Join Date: Jul 2015
Location: Texas Coastal Bend
Posts: 844
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This is for a household A/C, but it might still apply:
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05-27-2018, 09:37 PM
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#6
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Just as confused as you
Join Date: Aug 2013
Location: south central Wisconsin
Posts: 5,108
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I hope Swampy means 7.5 micro farad capacitor. It just may be the picture but the fan blades look wacky. Can you grab hold of the shaft and see if it has up/down/side to side play. Did you try turning the fan slowly by hand and see if you feel or hear it rubbing? Check for mud dauber / hornets nest inside with a mirror .
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Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, Seasonal since 2000.
Car Shredder Op/Tech, Scrap Metal Recycling - retired
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05-27-2018, 09:58 PM
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#7
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Senior Member
Join Date: Dec 2015
Posts: 241
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Quote:
Originally Posted by Scrapper
I hope Swampy means 7.5 micro farad capacitor. It just may be the picture but the fan blades look wacky. Can you grab hold of the shaft and see if it has up/down/side to side play. Did you try turning the fan slowly by hand and see if you feel or hear it rubbing? Check for mud dauber / hornets nest inside with a mirror .
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Scrapper, Thanks! The old eyes aren't what they once were. I blew up the picture and sure enough it is 7.5uF. It is amazing what glaucoma takes away from you without you even realizing it's gone!
..... Swampy !
__________________
Jim (Swampy), Susie, Jimmy & The Chihuahua Crew
2008 Chevy Silverado LS, 4.3L, V6, 2WD, 3.23:1
2014 287 BHBE; 1981 JayRaven: Predator 3500i - Call Home Pearl River, Louisiana. on The Honey Island Swamp
https://www.forestriverforums.com/at...pic81807_1.gif
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05-28-2018, 12:49 PM
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#8
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Senior Member
Join Date: Jan 2018
Location: Raleigh, NC
Posts: 9,413
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Porous bronze
Quote:
Originally Posted by Swampy
Skeetzee, you may be able to oil the motor shaft on both sides of the motor. You will probably need a penetrating oil then some 3 In 1 oil. Unfortunately those type motors do not have replaceable bearings, just the cast brass slip bearing. If you can get oil into it, you may be able to get a few more seasons out of the motor. Once it seizes to the shaft, it's time to replace.
Good Luck on the repairs .... Swampy
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Usually these sleeve bearings are cast bronze. At the time of manufacture, they are heated, then quenched in oil which fills the pores. As the motor warms, oil is released to provide lubrication.
Presumably, you could remove the bearings and re-do the process, but I wouldn't attempt it on a crimped-together motor like that one.
If it isn't too hard to remove the motor, you could take advantage of gravity. Put one shaft up and drizzle 20 weight or 30 weight oil around the shaft, spin the motor by hand and let it trickle in for an hour. Then invert and do the same thing to the other end.
Larry
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05-28-2018, 12:57 PM
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#9
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Member
Join Date: Jun 2013
Location: Tallahassee, FL
Posts: 97
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those blades are whacky because I loosened the fan blade to tilt it out a little bit. I did turn it by hand. It turns very nicely but I can hear a little rubbing going on. I noticed the 7.5 finger check. I did check for wasp activity and don't see any. Thanks for all the tips..
__________________
2014 Flagstaff 21FBRS
2013 Toyota Tundra 5.7
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05-28-2018, 03:35 PM
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#10
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Senior Member
Join Date: Aug 2013
Posts: 7,916
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I googled it. The cheapest I see one is $100 for a Fasco. No doubt better than OEM.
__________________
2017 Puma 297RLSS
2005 Ram 2500 4X4 diesel SMOKER!!
I love puns, irony and tasteless jokes...
born in Texas.... live in Arkansas
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05-28-2018, 08:44 PM
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#11
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Senior Member
Join Date: Jul 2015
Location: Texas Coastal Bend
Posts: 844
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Quote:
Originally Posted by Larry-NC
Usually these sleeve bearings are cast bronze. At the time of manufacture, they are heated, then quenched in oil which fills the pores. As the motor warms, oil is released to provide lubrication.
Presumably, you could remove the bearings and re-do the process, but I wouldn't attempt it on a crimped-together motor like that one.
If it isn't too hard to remove the motor, you could take advantage of gravity. Put one shaft up and drizzle 20 weight or 30 weight oil around the shaft, spin the motor by hand and let it trickle in for an hour. Then invert and do the same thing to the other end.
Larry
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Any lube you do now will likely only buy some time. Might want to start shopping for a new motor for the long term.
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05-28-2018, 08:50 PM
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#12
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Senior Member
Join Date: Jun 2012
Posts: 10,907
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Quote:
Originally Posted by Swampy
Skeetzee, you may be able to oil the motor shaft on both sides of the motor. You will probably need a penetrating oil then some 3 In 1 oil. Unfortunately those type motors do not have replaceable bearings, just the cast brass slip bearing. If you can get oil into it, you may be able to get a few more seasons out of the motor. Once it seizes to the shaft, it's time to replace.
You should be able to get a replacement blower motor at an A/C supply business. You will need the H.P. size, the RPM and the Voltage & FLA. The new one will likely come with the start/run capacitor(s) and instructions on how to wire it up. Also you may have a couple of extra wires to reverse the motor rotation direction (CW or CCW).
The change out isn't difficult, just turn off the power and unbolt/re-bolt and unplug/re-plug wires to the motor. I replaced my condenser blower motor last spring on my 4 ton heat pump and it cost less than $100.
Good Luck on the repairs .... Swampy
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I did this on a noisy home bathroom fan (Broan). It would last for a couple months, then I'd do it again. After putting up with it for about 18 months, I replaced the motor.
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1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
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05-29-2018, 12:07 PM
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#13
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Member
Join Date: Jun 2013
Location: Tallahassee, FL
Posts: 97
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Thank you everyone..I have another motor on the way. Might as well bite the bullet instead of worrying about it.
__________________
2014 Flagstaff 21FBRS
2013 Toyota Tundra 5.7
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