Couple of things.
1) this site is great for finding out issues/problems/solutions
2) After Loading a trailer full of logs Sunday one of the "supervisors" that usually just watch and crack wise spotted a bolt laying upon the ground.
after further inspection it was a broken off bolt, about 1/2 dia.
After searching around we found the source, the loader mount, where it mounts to the tractor frame.
Not only was one broken off and gone so was 4 other ones. 4 on the right side and 1 on the left side.
Of the 18 bolts that hold the loader mount to the frame 5 were gone and all but 3 were loose.
3) So first thing I did was search this website (see #1) and find that these bolts loosen is a common issue, so much so that JD recommends tightening every 50 hours.
My Bad for not knowing this!!
4) I repaired/fixed this today. Its easy enough to remove the loader then the mounting brackets. They are heavy so I used a floor jack to support them as I removed the last bolt holding them to the frame.
I had to remove the broken off bolts, very easy, drill them out. PRO TIP, always use Left Hand drills to remove broken off bolts. 80% of the time the act of drilling them out will make the bolts spin out and no further work is required. BUY YOURSELF A SET OF LEFT HAND DRILLS. My Local Menards has them, less than $10 bucks for a set of 8 or more drills. For me 4 of the 5 bolts came right out during drilling, one I ended up drilling thru and then using a easy out.
I retapped all the holes, just cause, 12mm x 1.75 tap and the holes are ready for reassembly.
I had to get some new bolts. 12mm x 1.75 pitch x 35 (10 required) and 12mm x 1.75 pitch x 55 (8 required) 10.9 hardness spec which is equiv. to a grade 8 I think, someone correct me if I'm wrong.
Well nobody had the correct lengths, they all had 40 and 60mm lengths.
So I bought the slightly longer, just 5 silly little millimeters longer, bolts. After trying reassembly it turns out that the slightly longer bolts wouldn't tighten up all the way.
So I broke out the hand grinder and hoogled the bolts down to the right length. Easy enough.
As I was I started assembling the mount back on it turns out that JD's bolts use a non-standard head size. 18mm hex instead of the standard 19mm for a 12mm x 1.75 pitch screw.
BAD on JD, why would they do such a stupid thing? Now I have to use 2 different wrenches when retorqueing bolts every 50 hours. Screw that (pun?), I ordered a whole new set of bolts from Mcmaster Carr.
Oh, and as always I stayed clear of buying parts from JD, I would hope my local JD dealer would have these guys in stock but I knew that JD would have a bend over and pick up the soap price on them.
55mm bolt $5.99 ea.
35mm bolt $3.29 ea.
McMaster Carrs price
55mm bolt $.94 ea.
35mm bolt $.84 ea.
SHAME ON JD for ridiculous prices!!!