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How to Replace the Brush Holders on a Makita Finishing Sander
Step-by-step instructions to remove and install carbon brush holders on a Makita finishing sander...
How to Replace the Motor Brushes on a Makita Finishing Sander
Learn how to quickly remove and install the carbon brushes on a Makita finishing sander.
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If a damaged sander has been grinding at your nerves, this article will show you how to quickly remove and install a new bearing cap assembly.
Worn Sanding Pad
Time Spent Repairing:
Less than 15 minutes
Entry Date:2014-01-20 14:34:31
Discussion for the Porter Cable 340 Palm Grip Finishing Sander
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Question: 330 Slow Down
I have a PC 330 speedbloc sander. It starts up at normal speed. When I put it in a wood surface and apply a small pressure, it slows down considerably. At no load it is fine. The brushes seem OK.
I did replace the metal grips that hold the sandpaper a while back. The originals formed fatigue cracks!
It's a nice (loud) sander, but it is not reliable. Anybody have any ideas about fixes for the speed problem?
Question: Porter Cable 340 Sander
The sander quit working, however first it started to slow down. I think it's the bearing, I removed the 5 screws, however I can't get the two case halves to come apart. What do I need to do to separate the case?
Reply: Porter Cable 340 Sander
You have to take the bottom sanding plate off? There are four screws for that. Then part #22 in the parts list, which is described as fan, but I think it is more accurately described as a collector to direct the dust, needs to come off. This has two screws, and keeps the two halves together from the bottom.
Question: 340 Sander
My 340 Sander works fine with pad holder off, but just hums with it on.
Reply: 340 Sander
Loosen up the screw holding the counter balance in place, a quarter to a half. THis should solve the problem. JOHN
Accessories for the 340