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How to Replace the Clutch Belt on a Porter Cable Orbital Sander
Prevent your random orbital sander from gouging wood by replacing the clutch belt to control the sanding pad speed.
How to Replace the Pad on a Random Orbital Sander
Use this article's steps to correctly install a compatible backer pad in a random orbit sander.
Time Spent Repairing:
Less than 15 minutes
Entry Date:2013-11-01 08:55:58
Discussion for the Porter Cable 343 Type 1 5" Random Orbit Sander
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Question: Porter Cable 343 Type 2
Item #66, part # A10943 on your exploded parts diagram is shown with the bearing installed. Does this part (bearing retainer) indeed come with the bearing installed or JUST the retainer?
Reply: Porter Cable 343 Type 2
The part in question A10943 bearing retainer, as it shows in the image does come with the bearing installed.
Question: Porter Cable 343 Type 1
The pad orbits but does not spin. The armature spins just fine and the clutch belt is in place. How to adjust the tension so that the pad also spins?
Looking at the schematic it looks like the cone washers were installed up-side-down. Could this be the problem.
Reply: Porter Cable 343 Type 1
Random orbit sanders do not rotate at a high RPM. It is a lot slower action, with a random orbit to eliminate swirl marks on the project you are working on. Let it run the way it is for a while and I think you'll find out it is working just fine.
Question: 343 TYPE I
I have both a 333 TYPE II and a 343 TYPE I. My problem is with the retainer in the 343, after a short period of time using the sander, the pad overheats the retainer and the three screws holding the pad come loose. Does anyone know if Porter/Cable or some other aftermarket Man. makes a METAL bearing retainer like the 333 that would fit the 343, I believe the main problem with them being interchangable is the bearing size...any suggestions ?
Reply: 343 TYPE I
You should replace your bearing retainer and screws. When you install the screws you need to use a loctite 242 on them and this should fix your problem.Hope this helps.Good luck.
Yes they will. The only difference is that the 333 was made as a Hook & Loop Pad sander and the 334 was made as a PSA (Adhesive Back ) sander. If your question was referring to the 343. The 333 pad will also fit the 343. The difference is the 333 is a 5 hole H&L pad where the 343 pad is an 8 hole H&L pad.
Hope this helps,
Question: Porter Cable 343
I have a Porter Cable 343 orbital sander. What is the difference between the PC 343 Type 1 and the PC 343 Type 2? How do I determine which I have ? Thanks
Reply: Porter Cable 343
The Type number indicates that changes where made to the design. The Type number will be located on the model number tag. If nowhere on the tag does it indicate the Type number you can usually assume that you have the earliest version, in this case a Type 1. Sometimes instead of spelling out "Type" the manufacture will instead just print T-1 or T-2.
I hope this helps with your repair!