I have an LG dryer purchased in 2007. Model: DLE9577SM. It was squeaking at start-up and rumbling a little. Not knowing what parts I would actually need, I ordered rollers with/without assemblies, tensioner pulley-only, new belt. After viewing this video a couple of times, I attacked my machine which is located in the comfort of my garage. Lots of room to spread out. Nice. This disassembly went OK however because, I suspect, my machine is 13 years old, the removal of the control panel was different than shown in the video. No locking tabs. My control panel has a screw hidden behind a plastic tab "press here", on the right-hand side corner (as you face the machine) which you remove, THEN the whole control panel will slide from left to right for removal. You may have to use a mallet on the left-hand side with a light tap to unlodge it. With my control panel, it was not necessary to disconnect all, rather just some, of the terminals so I was able to lay the whole thing to the side and proceed. The rest of the disassembly went according to the video. Turned out my belt was frayed and one of my rollers was bad. Replaced both items and will return the unused parts for a full refund.
Miscellaneous notes:
Gloves on all the time, sheet metal sharps at every turn. No blood drawn!
All of the Phillips screws are the same size.
Some of the screws were VERY hard to remove. Fortunately, I had a new, correct size, Phillips screwdriver which provided a very tight fit, especially after I whacked it with the mallet, so I was able to get all screws out undamaged. But I could see why some people would have trouble and run-out/damage the Phillips heads. Good idea to have a hand-held impact driver on-site just in case.
After you lift off the drum and the tension assembly is visible/available, do a dry-fit with the belt just so you are familiar with how it fits because when you put the drum back on, putting that belt in place is a little bit of a challenge.
On my specific model: on top of the machine, on the top of the control panel, is a separate trim piece, about 2" wide and runs the length of the top of the panel: there is no need to remove it but if you want to, it slides either to the left or the right, can't remember now. If you pry it straight up (like I did), one or more of the clips will break. Fortunately, even though I broke one of the clips, it re-seated just fine.
The bad roller I replaced: I replaced it with a "roller assembly" and not just a "roller". I may have been able to disassemble the bad roller assembly, retain the axle, and put on just a new roller? I will tear apart the bad assembly and will update this comment with what I discover.
Re-installing the drum: I did it by myself, but it would have been useful to have another person help with this. It's a little awkward lifting the drum, getting the roller in place, getting the panel into the notches, etc..It's not heavy, just awkward, a kid could help.
Cleaning out dust/lint: when everything is removed, a good time to clean out the vents. I stuck my leaf blower in the vent and blasted away. Not much came out which is good to know also, apparently has been venting properly the last 13 years. Did the same for the outside vent.
Keep track of your screws: after I put everything back together, 2 screws left over--- However, within 4 minutes I was able to locate the voids and put everything back together.
Took me 4 hours to do all this, learning along the way. If there is a next time, should be able to do it in less than 2 hours.
Tools needed: Phillips screw driver with proper head size (whatever that is ??); maybe a hand-held impact driver; if replacing rollers, open-end wrench and sockets as noted in the video.