I have a JD 3520 and just noticed one of these BM/HT bolts broken off and 3 missing. 6 others were finger tight. The threads are flattened on several. It appears that the entire front end rests on these brackets. How do you support the front end (with the front loader, a jack or a hoist?) to shift the bracket and drill out the broken bolt? Does any body really know what the bolts are? I know they have a slight shoulder and are 12 mm 1.75 pitch with 18 mm heads less than 35 mm long.
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