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98 2388 cleaning system service bulletin

2822 Views 5 Replies 5 Participants Last post by  jalopy
I was looking at some old service bulletins and there is one talking about the 2388s made prior to 2000 having the cleaning system belt pulley that measured 25" OD. The bulleting states that updating to a 24.27" pulley results in increased performance in high yield and or high moisture crop conditions.

We are Not in corn country and I am wondering if anybody has done this change and noticied any improvement. We primarily harvest wheat, canola, peas, lentils
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Yes, a noticeable improvement in high yielding wheat for both the 2388 and the 2366. Worth the cost of the pulley.
Does it make much of a difference for soybeans doing this update? I have a 98 2388, where can I see on the net old service bulletins?
i dont know where you can find it on the net. I had a friend that worked for case that let me go through some of his old stuff.

All the bulletin said is basically what I posted in my question.
Is this the cleaning system slow down kit that is in the combine parts kit book? TORQUE
The way I understand it was they first released the original slow down kit for 21s and early 2388s, which consisted of a larger pulley behind the top variable fan drive pulley, longer fan jackshaft belt, and shorter variable fan belt.

Then, at some point in time, some engineer decided that it was TOO slow for certain conditions, so then they released a slightly smaller shaker pulley (the big one behind the elevator) to speed it back up just a tad. So in reality, there are at least three different speeds of shaker systems roaming the countryside.

What I don't know is serial # breaks, as to which machine came from the factory with what kits & pulleys & updates. As with most axial flows, serial # doesn't mean much when you order parts, there's been so many different updates and changes through the years, some machines got them some didn't, so you just have to play dectective and figure out what you have and compare it to what you need, and sometimes the corresponding parts to go along with it.

Clear as mud?
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