I bought a flexycoil double shoot disc airseeder the other day.
It needed new scrapers/seed guides installed on the seed discs as they were all but worn out but loosening the two 5/16 bolts threaded into the strut were all but rusted in and 90 % of them broke right off flush or nearly flush with the hole.Now a couple broken bolts i can live with but 80 of them gets a little old fast.
It took me 2 days to extract them all. Most of them came out with welding a washer to the stub and then a nut to the washer and then heating up the surrounding area red hot with a brazing tip.I also wacked them good and hard a number of times on the head to try vibrating them loose. Some of them were more difficult and required a second or even a third attempt as they refused to budge and broke off again. About 10 out of the eighty i could not get and had to be drilled out and re-tapped.
Some pics.
It needed new scrapers/seed guides installed on the seed discs as they were all but worn out but loosening the two 5/16 bolts threaded into the strut were all but rusted in and 90 % of them broke right off flush or nearly flush with the hole.Now a couple broken bolts i can live with but 80 of them gets a little old fast.
It took me 2 days to extract them all. Most of them came out with welding a washer to the stub and then a nut to the washer and then heating up the surrounding area red hot with a brazing tip.I also wacked them good and hard a number of times on the head to try vibrating them loose. Some of them were more difficult and required a second or even a third attempt as they refused to budge and broke off again. About 10 out of the eighty i could not get and had to be drilled out and re-tapped.
Some pics.