Emerson Oscillator Gearbox Sealant?

[Synnove Vikstrom]

I'm not sure what they used at the factory, but wondering what sealant people use when refurbishing the Emerson gearboxes?

I was thinking of using a really thin gasket where the box attaches to the motor housing and then some anaerobic flange sealant to join the two gearbox halves together.

 

I went ahead and roughly lapped the gearbox faces to give help whatever sealant I use have a better chance of working. Turned out pretty good!

 

[Russ Huber]

Anyone have Emerson gearbox chatter that intensifies on the oscillation sweep?  Take out the brass gear and replace with a phenolic gear and it will sweeten things up. 🙂

Edited August 3, 2024 by Russ Huber

[Paul Carmody]

I just used a non hardening gasket sealer ,the old black stuff.Most fans I don’t use anything ,but these came from the factory that way.There must be a reason.

[Chris Campbell]

20 minutes ago, Russ Huber said:

Anyone have Emerson gearbox chatter that intensifies on the oscillation sweep?  Take out the brass gear and replace with a phenolic gear and it will sweeten things up. 🙂

Where did you find this gear?

[Russ Huber]

6 minutes ago, Chris Campbell said:

Where did you find this gear?

I found one in a 21648 gearbox. I bet it wasn't original. 

[Synnove Vikstrom]

12 minutes ago, Paul Carmody said:

I just used a non hardening gasket sealer ,the old black stuff.Most fans I don’t use anything ,but these came from the factory that way.There must be a reason.

Yeah RTV would definitely work. I hate using it though... such a pain to clean up if you ever plan on opening the part up again.

9 minutes ago, Chris Campbell said:

Where did you find this gear?

It's the gear that came with the fan. 1949 77648-AS

[Dave Hoatson]

Emerson gearboxes don’t need sealant. The grease is too thick to leak out. 

[Synnove Vikstrom]

4 minutes ago, Dave Hoatson said:

Emerson gearboxes don’t need sealant. The grease is too thick to leak out. 

The ones I have looked like they had sealant applied at the factory where the castings mate so I assumed it would be needed upon reassembly

[Paul Carmody]

I have not noticed sealant on older Emerson’s.As to the necessity I can’t say,but this later one came with sealant.You can clearly see where the gear box was sealed then painted as the factory paint is over black sealant.It was also on the gearbox to motor surface.There was  no indication that this fan had ever been apart.

Edited August 4, 2024 by Paul Carmody

[Mark Olson]

I have found remnants of sealer on the gearboxes, too. The stuff looks, acts and feels, for all the world, like Permatex #1 to me.

[James Gaspard]

Are these Emerson gearboxes from a 29646 fan? I haven't opened mine yet but wanting to be pre informed? What type grease is used in the 29646 box?

[Doug Wendel]

I've never used sealant on a fan gearbox and never had any leakage worth mentioning that I've noticed.  

[Anthony Lindsey]

Ditto,  never had one leak and never used sealant.    Lucas Red & Tacky is what I use.

[Chris Campbell]

1 hour ago, Anthony Lindsey said:

Ditto,  never had one leak and never used sealant.    Lucas Red & Tacky is what I use.

Agree. Never heard of sealants. Not planning to ever try it.

[Patrick Ray]

If a high quality grease is used, it won't "melt" and leak out of the gear box.