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Reload this Page IH-126393-C1 Speed-Up Pulley Identification
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Old 03-09-2021, 10:46 AM
HudsonvilleHornet HudsonvilleHornet is offline
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Join Date: Dec 2020
Location: MI
Posts: 13
Default IH-126393-C1 Speed-Up Pulley Identification
Howdy! New guy here, with new guy questions!

Bought a '71 build 149 last fall which came with a 44C deck that I want to use, and my homework led me to think I needed to swap the pulley out to use it on the older mower. I decided, why not take advantage of the situation and 'upgrade' at the same time.

So I dug up what I think was the appropriate part number (IH-126393-C1), didn't come up with anything used, so bit the bullet and bought a NOS pulley from IHCCW; they had it listed as a 3/8" Speed-Up Pulley. This was back in December..at that point I was just knee deep in getting it to run right and fixing things I found along the way. It arrived, I cracked the box open to make sure nothing was damaged, and up on the shelf it went. No bag or box that would ID it, no stamping or anything on the pulley.

Last night, after finally getting to the point where I am ready to move on from catching up on basic maintenance, I start looking closely at the pulley - and I am not sure I got the right one. Comparing them side by side, the top drive groove is actually wider than what is already on the 44C - the existing one on the deck measures about 3/4" overall width (outside 'lip' to outside 'lip'; not in the groove since it's hard to reference a radius/taper), while this new one is about 7/8". The OD is 4-1/4. The lower pulley is 3/4" or so in that same dimension, and around 4-1/2" OD.

So my questions are:

A) Can anyone confirm with the dimensions above that I do not have a 3/8" Speed-Up pulley, IH-126393-C1? I fired off an email to IHCCW but given my initial experience with them it may take a few days to hear back.

B) Does it sound like the pulley that is already on the deck will work on my 149? I'm no v-belt expert but my best guess based on the dimensions is it takes a 1/2" belt, but I am a little unclear on the interchange of 3/8" and 1/2" PTO belts on the older models.

Thanks for any help/insight!
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

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