Resurrecting an old thread....I tested my hooks to the limit and they worked. We moved and set 6 frost posts that weighed 700lbs each. Picked them up with the front bucket with a chain on the hooks. No problem at all....although I did scratch the paint!
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I see you grooved your tires. What did you use? Any issue with chunking?
I bought a grooving iron off of ebay. Haven't had any issues with chunking at all. I have noticed during the winter when plowing snow I do get a bit better traction. Downside is during the summer if I run through any mud it leaves a mess in the garage when I back the tractor in and the mud falls out of the grooves.