I'm not sure where the right place to post this would be, but here goes.
I bought this DW745 Type 2 saw off of Facebook Marketplace. I think it was abused. I replaced both of the elevating shafts (5140100-04 Diagram # 82 & 5140100-05 Diagram # 84). I also had to replace both of the bevel gears (5140061-65 Diagram # 56).
The aluminum housing seems to be okay and the lifting shafts move in and out without much resistance. I'm still getting this chunky movement when I raise and lower the blade.
I'm looking for advice before I go though the whole process of replacing the entire aluminum housing (Gear Case A25607 Diagram # 213) on the motor.
I'm not entirely sure here, I have a new DW7485 so i'm not sure if the mechanisms are entirely identical. It does seem that the jack screw is translating along its length and it shouldn't. Not entirely sure why it is free to move like that, a missing or damaged spring washer might, like having looked at your video it does appear like there should be more things taking up space in that area.
I am reluctantly ordering a single wave washer here for $9.76 if you include shipping:
5140032-75 Washer, Curved, 10.1 X 17Mm - Dewalt®
I checked all of my local hardware stores. I think Lowes usually has these, but they said their small parts vendor hasn't come to restock anything in a long time and they weren't sure when they would be coming back. All other hardware stores in my area didn't have them or staff wasn't very helpful.
I will keep everyone updated. I hope this is the last part that I need to order online. I'll try to do a summary video when I'm done because I haven't found many that really get into this level of detail on repairing this specific issue online. I'm just glad I'm keeping this thing out of the dump and I hope to start using it soon so I can start to build and repair some stuff around the house. Super excited about building a French Cleat system in my shed.
That do it?
Got the part in but my wife went into labor. We had a 8 lb 7 oz baby!
Obviously this is going to delay the progress of this saw project.
I did want to mention that the bent washer isn't very "bent". I'm going to figure out how to provide measurements once I can get to focus on this again.
I promise I'll get y'all updates at some point.
Congratulations! now get out of here and you go be an awesome new dad. That table saw will wait.