1977 IH Cub 1450
 

I just picked up a 1450 this past week. Overall the unit is in superb condition... very impressed. I replaced the carb today and she just purrs now. The deck is a 44a... 0320017U103967...

I have every intention of getting her perfect and mowing with her for as long as I can.

So... lol... Ive read every post I can find regarding the PTO belt. This is a hot topic! It came with a very cracked 3/8" belt that is twisted at the PTO. The PTO pulley appears to be designed for 1/2". The twin mule drive pulleys are definitely 3/8s. The deck pulley is 4.25" and definitely 1/2".

So the PO replaced the mule drive pulleys with undersized parts that might actually be to the specs currently used? Is that right?

Did I mention it cuts like a champ? lol

So what would you do?
A. try to find 1/2" mule drive pulleys? Then find the correct 1/2" belt?
B. throw another 3/8ths belt on there and call it a day?

I would rather fight the good fight and find the correct pulleys so I can use a heavy duty 1/2" belt.

What is the part number for 1/2" drive pulleys?



Rick
:American Flag 1:

Should be a 3/8" x 78" or 79". Using a 1/2" belt with 3/8" pulleys will destroy the 1/2" belt in no time due to the pulley edge cutting into the cord area of the belt.

The correct Mule Drive (PTO) belt for your application is #IH-59971-C1 Belt.

The belts are inexpensive... gonna order both and return/swap for another good one.

That ends up a 3/8s belt... you wouldnt look for 1/2 pulleys to match the pto and drive pulley ?

Right or wrong, this is what I use;

https://www.onlycubcadets.net/forum/...686#post385686

Works well on my 1200, 1450 & 1650. :ThumbsUp:

Your results may vary! :beerchug:

yThe IH design and parts has worked well for 40+ yrs. So, NO, I wouldn't change anything.

IF..........you want to re-engineer your tractor and deck, you certainly can.

The ebay link for the Stens idlers... arent those 3/8s? or am I reading it wrong? I am... those are 5/8ths... minus the walls.. 1/2

Im not a mechanic and definitely not an engineer.. lol

So the mule drive pulleys ARE 3/8s and everything else is 1/2.

I dont think its a matter of "everything else being 1/2" " The pulleys that your thinking are 1/2" I think are a bit deeper than a nominal 1/2" pulley allowing a 3/8 belt to ride correctly deep in the "V" opposed to a 1/2" belt riding closer to the top of the V.. If you put a 1/2 inch belt on there with original setup it will fray the belt rather quickly. However Ive had my 3/8 belt in place for a few years now with no issues. It was built to run this way