I have the smaller KL130 and the bolts are probably smaller too so no torque specs to help you. The one thing you can do and some dealers use it when installing the loader is to use blue loctite on the bolts. I'd take out the others and loctite them. I still put a socket on mine everytime I do service just to check but haven't had any come lose since using loctite. If you tap the hole bigger and wanted to stay with the factory bolt size, you could try a heli-coil. Just a thought. That same thing happened to a friends DK40 and the heli-coil worked fine.