On Sat, Sep 5, 2009 at 7:09 AM, Denny Springer wrote:
Larry, I just bought a CA on Monday. Here is the unusual part. I owned this CA from 1994 to 2001 at which time, I sold the tractor for $1750. I bought it back for $612. The tractor looks like hell and ran on two cylinders. The plugs were not even finger tight - two plugs had no gaskets. Plugs two and three were hopelessly fowled. I cleaned the plugs and put ring gaskets on those two plugs. It easily fired up and runs quite a bit better than when I sold it 8 years ago!
The live power clutch did not work when I got the CA the first time. The problem was the plate and balls for engagement. There was also some problem in the plates - interference with the clutch case prevented it from disengaging. I had to adjust a spot or two on the plates and add a couple of shim washers. It works better now than when I sold it.
I think that the part in question can be welded. If it is cast iron, which I suspect since the ears broke off, I've welded cast iron with some success with a wire feed. The big issue is not the weld material but instead heat. You need to get the cast iron quite hot before welding and weld it with fairly high temperature. I use either an acetalene torch or a map gas bottle with a propane nozzle. I simply try to get the weld area close to red hot but not quite. Then weld as quickly as possible. I welded a broken swing needle on my baler two years ago and it is still working fine. One thing, use a grinder to make a fillet on the break line. I try to get a V about 1/16 to 1/8 wide and at least 1/16 deep. Do one ear at a time.
I don't know anything about nickel. I am an engineer and did study metalurgy. My training and my experience is that nickel doesn't like any metal but nickel. No amount of heat will permit soldering. No amount or type of flux will permit soldering. I've never tried welding and I probably never will. On the other hand, there are folks out there who do it but I've never heard anyone brag about how good it works. Maybe your guy knows something others don't. I sure will be interested in your results. Brazing seems to me to have a better chance which is done with a brass alloy. Neither nickel nor brass will have the strength that steel will have. My wire feed uses steel wire with a flux core - after heating up the part, I weld at the highest heat setting and fasting feed rate. It takes two to do this - one for heating and another for welding. Weld immediately when the flame is removed.
I was playing with my "new" CA yesterday and didn't have time to respond. The tractors are at my ranch which has no internet.
What have you got to loose? The welding shouldn't take more than an hour.
I will give it a try as I dont think I will be able to find a used , or iven a new part. I'll let you know how it turns out.