Lube the heater fan motor ??

[dotdat]

I have removed the entire heat box from my 620. An entire rebuild on this unit is underway. Can the fan motor be dismanteled and the bearings oiled? Or is it not necessary ?

 

The fan was cleaned up and hooked up to 12 volts. It seemed to run OK.

[datzenmike]

I wouldn't recommend it. Motors like this are sealed for life.

[kelowg]

I would agree, i have tried that before amd it failed shortly after. Been working on furnaces and a/c.

units 19 yrs. But oiling one on its way out well buy alot of time. In other words if it aint broke dont fix it

[Figbuck]

I oiled my heater motor. I had to. It made an intermittent shuddering sound that drove me crazy for 25 years. Two seconds to dab some oil on it... hours and hours getting to it and putting it back together.

 

Maybe there could be some debate about the best kind of lubricant, maybe a teflon spray, graphite or Bosch has a tool lubricant that attracts no dirt or shavings. But I didn't think that hard about it you know? My heater was so funky, at that point anything was going to be a big improvement. So, it's been almost 4 years of daily driving since the heater overhaul and I haven't had any issues.

 

If you got the heater case all apart it's a missed opportunity not to lube the motor.

 

If your going to go to all the trouble to refurbish your heater... ratsun heater trick.

 

Good luck amigo.

[Seeker > 620 KC]

35 years ago my friends dad was a maintenance machinist for the West Coast Wall Street Journal newspaper printing facility in Riverside. He showed me a neat trick for extending the life on a squealing sealed elec motor.

 

Take the smallest dia drill bit you can find. Lightly drill a hole in the bottom end of the motor casing where the motor shaft would bottom out. That would be the opposite end from the squirrel cage fan. He would take an old fashioned oil can and slowl drop 2 small drops of motor oil into the hole and then work it in by slowly spinning the squirrel cage by hand. Any more will run into the field windings.

 

Then he'd take a dab of whatever heat resistant sealant he had laying around and seal up the hole i.e.: permatex, silicone, etc. i did it a couple times and It kept my 68 Chevy van blower fan quiet and running for a few years before I finally wrecked it.