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JD 4400 handler

Bill Burge Have a customer with an early jd handler which is mostly an updated matbro
Problem is the pivot pin in the boom end that holds the large connecting link between crowd ram and the tool carrier.
This has beeen modified many years ago and has tapered cones either end of this pin, and theoretically the tighter you tighten the bolt, the more the cones grip onto each other holding pin solid.
Several times now said bolts have slackened allowing pin to float, and two metal cones have now cracked and im unable to find replacements, a Jd fitter seems to recall the mod years back, but obtaining new is a problem.
Any ideas anyone ? incidentaly the cones are VERY hard, so wont be practical to have made ?

Dale Bill: You had indicated in your post regarding "the bolt" and in the next sentence named "said bolts". Is the pin drilled for bolts on each end or is there "a bolt"?

I am only assuming now that each end of the pin has been drilled and there is more than one bolt. Is there a large flat washer on each end that is bolted tight to make the cones come together and tighten the shaft?

Either way the cones that are cracked, are they large enough diameter to braze. I have seen heavy machine shops braze bull gears for a dozer with a huge rosebud and 5 braze rods twisted together. I have used this method several times since with good success.

Bill Burge Dale....... yes there is a bolt either end maybe 20 mm dia, cones arent much bigger than the shaft,and a very exact fit, so repair would be difficult, thats why im seeking new or s/hand ones.

Right now it operating fine with bits put bach as they are, and have a felt pen line drawn on bolt head for owner to look at to see if it loosens.



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