no need to take anything apart, if you lay under the truck and look at the back side of the drum you should see a small rectangular rubber piece with rounded edges, you can pull it out and access it from there, you can use a flat head screw driver to spin the star wheel through that hole. I'm guessing this is not the solution to your problem though. I think you'll need to tighten the cable up but I'm not sure how exactly to do it. I'd check around the ebrake pedal to see how its connected and go from there. Google may be your friend on getting that thing tightened up.