Torque converter

[Bbqman]

I have an MTD Columbia I am restoring. It has a fairbanks morse driven pulley. In the box of parts that were with the bike I have a driver pulley. It does not look like the fairbanks morse driven I have seen in other photos, no name numbers or any other identification. Does anyone know the brand and if it will work with the original driven? Thank you

 

[Richard Trotter]

Probably a Comet 20, should be a good replacement if the original isn't available.

 

[t555trailblazer]

Your driven is most likely symmetric. You need to make sure you’re driver is the same.

 

[Bbqman]

Probably a Comet 20, should be a good replacement if the original isn't available.

What about the one I have in the picture? No marking at all

 

[cfh]

series20 drivens pull inward. series30 drivens pull outward. on that MTD it's a series20. it also is probably a 5/8" wide belt. all the new drive units will be set up for a 3/4" belt. you have some thinking and/or work to do here to make it all jive together... Most of the TC drive units off say ebay are series30. that won't work with the original series20 driven on that MTD. also all torque converters sold today (drive and driven) will be 3/4 belt. and that won't work with your (probably) 5/8" belt driven. But the good news is you can convert that new drive unit to a series20 with about $25 in parts. and you can convert it to 5/8" belt too. it's some work but you can do it.

 

[Bbqman]

series20 drivens pull inward. series30 drivens pull outward. on that MTD it's a series20. it also is probably a 5/8" wide belt. all the new drive units will be set up for a 3/4" belt. you have some thinking and/or work to do here to make it all jive together...

Can you tell in my picture what one that is? The is no markings at all

 

[t555trailblazer]

Can you tell in my picture what one that is? The is no markings at all

With no markings, it’s probably a Asian import copy of a comet. You need to post a pic showing where the belt goes to tell if it’s a 20 or 30 series

 

[Bbqman]

With no markings, it’s probably a Asian import copy of a comet. You need to post a pic showing where the belt goes to tell if it’s a 20 or 30 series

 

[Bbqman]

Does this help?

 

[t555trailblazer]

Asymmetrical 30 series driver. It won’t match up with your driven.

 

[Bbqman]

Asymmetrical 30 series driver. It won’t match up with your driven.

What would you suggest I do?

 

[t555trailblazer]

What would you suggest I do?

You need to have a matching driver and driven. I am not sure which is the better series to run on a MTD... either get a 30 series driven to match your driver or get 20 series complete set up. You need to search it out a little further to see what other people have done. I am unsure which series.

 

[t555trailblazer]

I forgot to mention another option, especially if you’re going original. Keep an eye out for one of these little guys to match your driven. They pop up for sale every once in a while.

 

[Bbqman]

View attachment 271731
I forgot to mention another option, especially if you’re going original. Keep an eye out for one of these little guys to match your driven. They pop up for sale every once in a while.

I want original for sure. Thank you

 

[mustangfrank]

View attachment 271669 View attachment 271670 View attachment 271669 View attachment 271670 I have an MTD Columbia I am restoring. It has a fairbanks morse driven pulley. In the box of parts that were with the bike I have a driver pulley. It does not look like the fairbanks morse driven I have seen in other photos, no name numbers or any other identification. Does anyone know the brand and if it will work with the original driven? Thank you

Back it up a second, let's hear about that serious piece of smoking machinery in the background...hobby or business?

 

[t555trailblazer]

Build off entry about 3 or 4 years ago... still a project LOL

 

[cfh]

another thing you could do is buy a series20 inside sheave and it would basically convert that series30 drive to a series20.
https://www.OldMiniBikes.com/20-series-stationary-sheave-3-4-bore.html
as for the belt difference 3/4 versus 5/8, you can do some lathe work to the drive to make it 5/8". or some spacing to the driven to make it 3/4". or you can just buy the right stuff. that would probably be the easy thing to do...
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=361207391979
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=331761235325

 

[Bbqman]

Back it up a second, let's hear about that serious piece of smoking machinery in the background...hobby or business?

Haha. Business. Lazy River Barbecue

 

[Richard Trotter]

I agree with what cfh says, the only difference between a series 20 and series 30 is the stationary side

 

[Bbqman]

another thing you could do is buy a series20 inside sheave and it would basically convert that series30 drive to a series20.
https://www.OldMiniBikes.com/20-series-stationary-sheave-3-4-bore.html
as for the belt difference 3/4 versus 5/8, you can do some lathe work to the drive to make it 5/8". or some spacing to the driven to make it 3/4". or you can just buy the right stuff. that would probably be the easy thing to do...
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=361207391979
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=331761235325

another thing you could do is buy a series20 inside sheave and it would basically convert that series30 drive to a series20.
https://www.OldMiniBikes.com/20-series-stationary-sheave-3-4-bore.html
as for the belt difference 3/4 versus 5/8, you can do some lathe work to the drive to make it 5/8". or some spacing to the driven to make it 3/4". or you can just buy the right stuff. that would probably be the easy thing to do...
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=361207391979
http://rover.ebay.com/rover/1/711-5...0001&campid=5335845805&icep_item=331761235325

So is it as simple as replacing the driven pulley?