I bought a vevor bench grinder with sanding belt combo earlier this year and the motor gets pretty hot after using it for about a minute and on the belt sander side its real noisy it has been noisy since i recived it in the mail and pulled it out of the box!! I was wondering if there was a troubleshooting manual for it, its a 6" grinder wheel and 2 x 28 belt sander i cant find anything on it!! I can find information about the 250w unit but not the 375w unit the sticker is scuffed model number