Suburban furnace fan lubrication

[richard5933]

Look up Suburban RV furnaces. They still have that model in identical dimensions and port locations.

I've searched all over for that. The closest I've found is the NT-34SP. it's close but not the same. Did you find a replacement for the NT-32CD that was the same size? Love to know where you saw that if you did, as I've searched high and low and haven't found it yet.

[chessie4905]

Give them a phone call. If they carry blower motors and combustion Chambers, then fix it. If it is early one of uncommon standard dimensions, then bite the bullet and upgrade. Either company or major dealer should be able to recommend which model would replace it best. At least then you can make your installation more serviceable. Is that plywood behind it removeable from other side?

[Dave5Cs]

its in  this link to the PDF HTH


http://www.bdub.net/manuals/Suburban_NT_22A_22C_22CD_32A_32C_32CD_DTM_4-76.pdf

[eagle19952]

Look up Suburban RV furnaces. They still have that model in identical dimensions and port locations.

then parts should be a piece of cake...

[richard5933]

The model we have was made in the 70s. They still have similar model, but there are enough changes to make it not be so simple.

I'll be tearing into the project this week if the weather holds. Once I get the furnace pulled out I'll be able to make a better decision. Unless the motor can be made to work, then replacing at least the motor will be necessary. Up to this point I have not found any source for a direct replacement on the motor. There are a few similar looking ones out there for sale, but without a cross-reference chart there is no way to know for certain they will fit and function properly.

The way the cabinets around the furnace were installed makes any changes to them very difficult. The newer furnaces are slightly smaller, so perhaps one will work and allow for ducting to be connected. I'll see.

Thanks for your suggestions. I will keep them in mind as things progress.

[sledhead]

you should get a saw like this https://www.homedepot.com/p/RIDGID-JobMax-4-Amp-Multi-Tool-with-Tool-Free-Head-R28602/206824272 

it makes it easy to ADJUST ! things to the new systems .

I have redone a lot of stuff on the dated featherlite as some of the systems that were state of the art in 2000 are not made today and I have a saw like that and it makes work easy and precise when redoing things

dave 

[lostagain]

Great suggestion from Sled Dave: the Multi Tool is the best invention since the hammer...

JC

[richard5933]

Let the work begin. I was able to remove the floor of the cabinet above the furnace which gave me enough access to remove it.

Richard
1974 GMC P8M4108A-125 (Current bus)
1964 GM PD4106-2412 (totalled Sept 2017)
Located in beautiful Wisconsin
KD9GRB

[Oonrahnjay]

Let the work begin. I was able to remove the floor of the cabinet above the furnace which gave me enough access to remove it.
Richard

    Nice!  Good luck with what you find. 

[richard5933]

The inside of the furnace really looks like it's hardly been used. The paint on the heat exchange unit is fully intact, and the rest of the unit is in great shape. The only thing that I can see wrong at this point is the very stiff blower motor.

I was planning to attempt a rebuild on the motor, but on a whim I called Suburban. They had a current part number for the motor, and I was able to order one from a parts supplier. It should be here before the weekend.

If all goes well, I hope to get the furnace into my shop and do the motor swap this weekend. I'll try and get some photos as things progress.

[chessie4905]

Off subject, but does your coach have a u-line icemaker?

[lvmci]

Hi Richard, do you have a suburban phone number? Tom lvmci...

[richard5933]

Hi Richard, do you have a suburban phone number? Tom lvmci...

423-775-2131

This is the number for the parent company, Airxcel. The phone answering system didn't seem to have an option for consumers looking for parts and even said that they don't sell parts to consumers, but I pushed enough buttons to get a real person who was able to look up the part number for me. Once I had the number the part was only a Google search away.

[buswarrior]

Well done on the tenacity!

When calling vendors, getting past the gatekeepers to someone inside who "just helps you" is the key.

happy coaching!
buswarrior

[richard5933]

This is what an unused 43-year-old heat exchange unit looks like. It's also why I'm making the effort to salvage the furnace.

Also a photo of the burner. Some surface rust, but no real sign of use or corrosion.

The only thing that I have to figure out is how to install a metal crossover tube as would have been done in the recall. This one still has the original rubber tube, and while it's still flexible and soft I figured it would be a good idea to swap out for metal. Apparently the recall part is NLA. I've got a length of 3" muffler pipe and just need to figure out a way to gasket the ends. Right now I'm thinking of using the original rubber tube as the gasket by cutting off 1/2" rings. The muffler pipe is a tight fit over the rubber.

Motor should be here tomorrow, and then I'll put things back together.

Richard
1974 GMC P8M4108A-125 (Current bus)
1964 GM PD4106-2412 (totalled Sept 2017)
Located in beautiful Wisconsin
KD9GRB