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How I did it , Loader drive shaft

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Rich

10-25-2002 23:59:10




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I recently aquired a 52 8N with a Howard Rototiller and a Davis loader. I'm during a lot to the engine and it required me to fix the Hyd Pump shaft drive. For years the previous owner ran it in essentially "broken" condition. This ruined the bores in the pulley. Solution.... I brazed the holes and recut them to the original size. This basically restored the pulley but my next problem was how to fix/replace the drive lugs on the pump shaft flange? First, I pushed what was left of the old lugsout. Then I drilled and tapped the holes for a 3/8-24 thread. Then I installed four socket head cap screws with the heads protruding into the boresof the pulley. Socket head cap screws are harder and tougher than most other screws. While the socket head screws were close to the bore size, they were smaller. What do I fill this gap with? After a consultation with a friend, I decided on babbitt. But where does one get babbitt? I found I could melt a small amount off some old bearings I had laying around. With a specially sized flat washer to center the head in the bore, I was able to position each cap screw in the bores and cast the babbitt as a sleeve on the head of the screw. The fit was perfect. Now, How it holds up remains to be seen. But babbitt can take quite a pounding, Melts at low temperature, Alloys with lead. Is very easy to cast. I just thought I'd pass this along to anyone with similiar problems. Regards, Rich

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Mike OH

10-26-2002 12:42:16




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 Re: How I did it , Loader drive shaft in reply to Rich, 10-25-2002 23:59:10  
Rich, It's been a long time since I worked on the Wagner loader on my Jubilee, but I was able to buy all the studs, and rubber bushings needed to rebuild the loader drive shaft at my New Holland dealer. At that time he even had new shafts and pulleys. Don't know if they are still available, but it would be worth while checking. (The holes in my pulley were larger than the studs, and each hole contained a rubber bushing). Don't know if the drive shaft is the same on your loader, but they may be similar enough to work.

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Dell (WA)

10-26-2002 00:53:27




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 Re: How I did it , Loader drive shaft in reply to Rich, 10-25-2002 23:59:10  
Rich..... ....very clever....but....(and you knew that was coming, grin)..... .

If I understand your description correctly, you cast babbitt around your 3/8 caphead screwhead to fill space. (who even remembers what babbitt is?) What would have happened if instead, you had just used a larger caphead bolt like 7/16 or 1/2? Then you would have probably had to drill every thing out bigger to fit. Rather than casting babbitt to make a large hole small.

Still its a creative "win" for you..... .....thanks for sharing, Dell

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Rich

10-26-2002 19:02:59




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 Re: Re: How I did it , Loader drive shaft in reply to Dell (WA), 10-26-2002 00:53:27  
Dell, ( Rich grinning) Yeah I knew it was a great Idea. I was "casting" about for a material to pack thats space with and I was originally thinking of nylon, delrin, or a hard heavy urethane. I called my old buddy Eric and batted the problem back and forth over the phone. He very accurately described it as a "Pinch Load". I immedialtely visualized the bearing load on a rod bearing imediately after combustion. Only difference was that this was a steady load. Not a pulse, or intermittent load. Far easier on the parts involved. Babbit..... I was mildly surprised at how much babbit I was able to get off the surfaces of the old bearings I had laying around. They were also from a 9N and I had four complete rod inserts. I did have to mix in a small amount of lead to get the required amount to make the sleeves. Truth is, If I had to go buy babbit, I wouldn't know where to start looking. So Guys, before you toss out those old inserts, maybe it would be wise to melt off that babbit and keep a small amount around. I know I will be. Regards, Rich

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