Instructables
Picture of Repair of a Delta Belt Sander
We got a broken delta belt sander. We didn't know what the problem was, but after gathering the right tools and a bit of part searching and ordering, we could get the replacement parts. Then, after few hours of diagnosis and labor, we were able to get the belt sander up and running again!

Here is how we fixed it.

Step 1: Tools

Picture of Tools
3980280685_ef08e1d832.jpg
3981040488_4dc80a4f1f.jpg
To be able to get started, you'll need the following tools:

- Screw drivers ( 3 standard sizes).
- A hammer.
- Set of allen keys (different sizes).
- Thin wire.


Step 2: Diagnostic

Picture of Diagnostic
3983666877_b647c89a3f.jpg
3983826777_9fedc16555.jpg
3984427568_8dfc70f215.jpg
- First we inspected the power cable. Because the cable was in a good condition, we decided to connect the sander to the power.

- - Once powered, we were able to diagnose that sander belt was not turning but the engine was working fine. The motor seamed to have no load; it was spinning but nothing else happened.

- We decided to open the machine.

- While unscrewing for opening the cover, we realized that one screw was missing. We used an screw of the same size from the robotic life tool box.

Step 3: Opening and identification of missing/broken parts

Picture of Opening and identification of missing/broken parts
3983662521_f41e7655f9.jpg
3984427230_01f2fd26e9.jpg
- To open the belt sander, we turned the machine upside-down and took the cover off.

- Once opened, we suspected that there was something wrong between the motor and the sander belt. However, we couldn't identify right away which pieces were broken.

- We inspected the motor axis with a wire, trying to pull off the loose pieces. Though we were able to identify which pieces were out of place (rubber belt and motor axis cap), we couldn't take them out.


Step 4: Moving the motor

Picture of Moving the motor
3980279103_c21c2e79ab.jpg
3981038738_a5f9ab7376.jpg
3980279687_0d9fe25147.jpg
3981041988_36212b5788.jpg
3983667165_3a76fe8fec.jpg
3983667321_4f7944017a.jpg
After the unsuccessful attempt to taking the pieces out using the wire, we determined that we needed to move the motor outside its protective cover. To do that, it was necessary to unscrew the disk that rotates over the machine's horizontal axis.

 
Remove these adsRemove these ads by Signing Up
bobzjr10 months ago
THANK YOU for posting this helpful instructable. I have the same Delta sander.

Any advice on removing the aluminum disc? Mine is stuck!
I'm very familiar with the set screw accessible via the top with a hex key. I have taken it out completely and replaced back into position multiple times. With limited view and access, it's much like Arthroscopic Surgery!

As I cannot remove the disc, I also am unable to remove the black plastic housing which is positioned behind the disc. In order to check out the belt, I had to improvise and made my own new "access hole". I riveted part of CD to use as my pivoting cover. Actually very functional.

I was able to see that my belt is worn strangely. If you think of the ridges as running horizontally, I see that the left 50% of ridge is about completely worn away. The right side still looks OK. The belt has come off FREQUENLTY. I'm able to get the existing belt back on properly. But - I'm guessing a new belt will certainly help.

Unfortunately, I'm not sure I can replace the belt without getting access behind the black plastic cover. Any suggestions on how to get the aluminum disc off? Would you have any suggestions? I've put a couple pictures here to illustrate...
DELTA BELT.jpgACCESS HOLE.jpg
bobzjr bobzjr9 months ago
I finally figured out how remove the stuck "aluminum sanding plate". After peeling off the sandpaper disc, I noticed 3 holes visible from the outside. I hacked together a custom "gear puller" and it worked! See photo here. Also, I plan to put up some detailed notes in a separate instructable. You can find it by looking for: "How to Remove a Stuck Disc Sander Disc".
Gear Puller for Delta Sander plate.jpg
Oberoten2 years ago
Hello, Im in need of assistance, Im about to buy a second handed belt sander, exact same model, only thing is, the rubber belt is missing, but the motor seems to work just fine, if you could only send me more info on the rubber belt, like measure length and wide it would help me a lot with my decision. Thanks, by the way, Nice instructable, very detailed.
i have that exact same belt sander. it was making a squeaking noise and the engine did not run smooth, so i opened it up an had to loosen some of the screws with some liquid wrench. i discovered the problem was that the disc was loose so i secured it. then when i ran it again it did not squeak but it was still rough sounding. then it stated smoking, and slightly caught on fire. now it does not run but when turned on it makes a buzzing sound. i think it probably short circuited because of the oil, and burnt out the motor. do you think it would be possible to replace the motor?
Absolutely. A wonderful instructable. Thank you for taking me through all the steps. I had a similar problem with a Ryobi sander, and the drive belt was the problem. I wouldn't have even known what to look for had I not seen this. So I wanted to thank you for saving me $60 in repair shop costs. :)
anti_dolph4 years ago
Hi could you post a picture of the "drive wheel", the part that is in contact whit the sandpaper belt and makes it spin around, cause i am planing to build a home made belt sander and was wondering which shape and textured it had and hoped you might have a picture of it. Anti_dolph