THE MOTOR MAKES LOTS OF KLUK/KLUK NOISE.

It sounds like your motor is okay if it is trying to drive the unit, it may be that one of the gears inside the unit have broken or chipped. this can cause a lot of damage quickly and should be disassembled right away and cleaned. another source of this noise could be that your motor fan blade which is attached to the motor is hitting the armature field winding. you could easily detect this if you have the back panel off and turn your mixer on This motor is not a Hobart motor simply because its made by Whirlpool and Hobarts motors for smaller mixers are mostly no longer available as where the whirlpool motor is still available.hope this helps

Thanks