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Thank you for all the suggestions.  I will put them to trial tomorrow after I get my partially restored Alemite tractor pump put back together.  That way I can ensure all of the rollers and such are properly lubed before the 4x4 test with loosened bolts.  Yes they all were rotating before putting them back on the track frames, some only with a wrench though.  thanks again, I will drop a note tomorrow night or soon thereafter to let you all know if it worked.

I think it is a Cletrac B.  Not sure if it is gas or diesel.

3100$ for this beast.  What do you guys think?  I will not be able to pick it up but some of you might be interested! https://missoula.craigslist.org/hvo/6144593287.html

I finally got my tractor rolling again today!  Bad news is that the rear left roller is not rolling.  Any ideas?

Came through for me as well.

I oiled them with 30w oil as I assembled them.  Once one side had the bushing retainer assembly, seal and clip in I flipped it over, inserted the shaft and prefilled the roller with oil before assembling the other side.  The seals were installed correctly as I was extremely careful on making sure the seals were pointing the correct direction.

I have the six track rollers installed on the track frames but I can not turn them by hand.  Is this going to be a problem or will they work in?

One place you might look to find information is steam locomotive maintenance records.  They had to change the "tire" of the locomotive driving wheels.  The tires were some inches in thickness, were a different type of metal than the wheel core and slipped over the wheel in the same way the sprocket does on our crawlers.  The way I understand it is they had to expand the tire with heat and cool the wheel somehow.  They then had to slip the metal tire over the wheel and set it as the two cooled and warmed up respectively.  You might find some photos or even videos on how they installed, balanced and centered that tire to allow those drivers to propel the steam locomotives upwards of 80 mph.  When I was in the steam shop of the Union Pacific Rail Road in Cheyenne, WY, they were working on the boiler of one of their functioning Locos and the driving wheels were taller than I am at 5'9".
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A quick question for you guys:

Why go through all of the work to install a secondary transmission when first gear could be replaced with a lower ratio gear set, moving the first gear to second possibly?  I am pretty new at modifying gear sets and addressing the problem of too high of a gear for first.  Thank you for your answers!

Welcome to the group, Nikko!

A happy thanksgiving to all!

I re-read your post and saw you stated that your tractor had a faded OC-3 sticker, so it must be an early OC-3.

The early idlers have the holes in them while the late are solid with bolts.  You should be able to see the late idlers in my pics from other posts.

Hey, nice find!  What I know is you have the early front idlers and with no water pump I am guessing it is a late cletrac.  Does it have a second transmission?

Can anyone tell me the minimum length of these retainers before replacement is needed?  I have to rebuild all six of my rollers and the retainers are all in various stages of wear from thrust forces of the roller shaft.