Is anyone having maintenance problems with brakes on Kawasaki Mule 3010 trans 4x4?

Yes, just bought a 2007 3010 trans 4x4, and the brakes started grabbing. Took it to the shop and shoes were in good shape. The grabbing stopped after I

bleed off at all four wheels. I don't have much play in the brake peddle. It has

done this twice and I have to bleed the brakes to free them.

Nothing appears to be worn, but sure would like to know what is causing

them to grab.