Wd45 hand clutch disc

If it still had shims under the cover it probably has a lot of life left. These will stand a lot abuse (slipping/riding) and still live. With normal use if it has a bit of a "snap" when engaged or disengaged and still has a few shims it will last a long time before you have to adjust it by removing more shims, then it will last a long time more.
 
After splitting the tractor,I took my old components into Tacoma, to a regular clutch and brake business They called it a Rockwell unit, and rebuilt it. (1955 WD45)
 
2-disc hand clutches are totally different discs than 3-disc hand clutches. The 3-disc units are thinner to begin with and I doubt can be rebuilt.
 
I believe I got mine from Tired Iron. As others have said the 2 disc setup is different than the 3 disc. The thickness of the friction discs and the steel separators are different which changes the overall stack up height. I looked at switching mine to the 3 disc setup but I was going to need more parts and a thicker wallet. For what I do 2 disc will be fine. In this process of ciphering I called up the tired iron guy and he was kind enough to measure the disc thickness with a caliper to help me make the decision on what it would take to do it. You couldn't ask for better customer service than that.
 
It's also worth pointing out that while you have it split change the shaft seals, the one on the main shaft behind the engine clutch and the one that separates the hydraulic/wet clutch oil from the transmission/rear end oil. Also, there are three pilot bearings that should be changed. The one in the engine flywheel (ball bearing), the one between the main shaft from the engine clutch and the transmission input shaft (bronze), and a cage roller bearing between the transmission and rear end. I went ahead and changed the three main shaft bearings, all the same. I was dumbfounded to find that they are metric!! I wouldn't have expected to find metric deep groove ball bearings in a U.S. tractor from the early 50's.

It's been a few years since I had my hands this deep so I might be a bit off on my descriptions. Feel free to correct me.
 

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