Allis Chalmers 1942 C PTO and Belt Pulley

Bookman

Member
I continue to work on my Allis Chalmers 1942 tractor. I am going to replace the seals and gasket on the PTO and the Belt Pulley. I have found a few older messages about doing this, but I thought I would check and see if there is anything new I need to know. I have a 1-1/8" shaft, and it probably has the "oil return groove" others have mentioned. Others have mentioned a need for a speedi-sleeve but not where to get one. Fortunately, I am only a few miles from an ACGO dealer and a NAPA store. Any tricks in getting the old seals out? I hate doing all this and discovering I missed something or the shafts are still leaking, so thanks for any heads up advice ahead of time. P.S. I do have the tractor running now.
 
I haven't replaced the belt pulley seal on mine yet so I don't know the details of that particular job. In replacing seals in general though what you have to be careful about is nicking the shaft or seal housing which can cause leaks with the new seal. They can be pulled with picks, screwdrivers, screwing sheet metal screws into them and pulling on the screw. It takes time and patience to extract the seal and not damage something. As for speedi sleeves, you man or man not need one. If the shaft is smooth and not grooved or rusted you probably don't need one. They aren't cheep. If the seal can be positioned so the sealing edge is not on the worn groove you can probably get by without one too. Sometimes a seal can be driven in just a little more than the old one and get to a unworn area. If the old seal was bottomed out you can't do this. If the shaft is rough and might damage the new seal when you slide it on put plastic electrical tape (one thickness) over the shaft. Remove it when the seal is in place. Slide the seal on with grease or oil on the sealing lip to make it slide on better without damage. Try to tap the seal in using a large pipe or tube so you are tapping on the whole seal, not just part of it. Try and make it go in even. A piece of steel tack welded to the ind of your installation tool to hammer on helps by allowing you to tap on the center to push the seal in evenly. If you can't do this tap lightly around and around to make it go in evenly.
 

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