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Checked the net for answers and got a couple of maybe's. 1.) Brushes, 2.) variable speed control, which some were direct wiring.
I tried the brushes firs and that has solved the problem for now. I guess the brushes stuck or somehow lost contact.
I got a parts diagram and found the brushes (will be covered with dust). Took the springs out and stretched them a little, replaced and the sander turned on. You will need to remove the top cover to do this. Verdit is still out as to long term performance. Not a great start.
My particular sander was lightly used (second project) and it has not been abused.
There can be a few problems. First is your air supply the right pressure and volume for the sander. Check that at the quick connector to the sander itself. Second, if it is cold and moisture is high, ice can get into the sander which will slow it way down. Third, and probably most likely cause, is the sander well oiled and the parts inside clean. Fourth, mechanical issues: the drive motor may be well worn out inside, the bearing that the main shaft for the sander may be worn out & so forth. Hope this helps you, Rick
hi a major problem with pneumatic tools is that nobody ever seems to oil them! try droping tool oil or a light machine oil down the air inlet and leave over night and then run the tool on full ,if this doesnt work then strip the tool and clean and make sure that the blade sealing surfaces are good
hope this helps ian
Here's a link to the online manual.
As far as that diagram....didn't you label the wires?
Take a look here, it may help you. circuit wiring , especially the paragraph that begins: "Knowing that electrically common points have zero voltage drop between them is a valuable troubleshooting principle." Also read about resistors. That speed control knob is one.
Hope that helps...
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# Ensure that sanding belts are not too tight or too loose. Never operate a sanding disk if the paper is loose.
# Use the correct grade of abrasive material for the job.
# Ensure that the distance between a circular sander and the edge of the table is not greater than 1/4 inch.
# Do not push materials against sanders with excessive force.
# Sand only on the downstroke side of a disk sander.
# Do not hold small pieces by hand. Use a jig for pieces that are difficult to hold securely