Porter Cable 7424 maintenance?

[Richard's Detailing]

Hi Guys. I`ve had my PC7424 for about 3 months now and I noticed that it`s starting to have too much vibration as if it didn`t have a counter weight on. Before, I installed a 6" counter weight and it ran smooth with a 6.5" LC CSS pads. I made sure now that the counter is properly secured and it is but I still get heavy vibration after 3 minutes of using the PC. I just bought a antiv-ibration gloves to lessen the pain to my hand caused by the vibration.
Is there some type of maintenance kit to make the PC run smooth again? Thanks!

[CharlesW]

Since you aren`t getting much response, I`ll thwough out what little I know.
1. The owner`s manual says the unit has enough grease to last the life of the tool. That could be good or bad.
2. They do recommend having it serviced by a service agency at the 100 hour mark.
3. An owner`s manual is available from DeWalt-Porter Cable if you have lost yours.
4. My unit has not been serviced in the 6+ years I have owned it.
5. Mine has never been smooth, but it isn`t difficult to use even with the vibration.
6. If yours has changed in the vibration level, it might be worth taking it to a service facility to have it checked. At the time I purchased mine, they carried a 1 year warranty.