The blades won't turn when the power is turned on. they seem to get stuck

If you can disconnect the power to unit and check shredding blade alignments to see if there is a clog or if the blades are out of alignment and stuck. If there doesn't seem to be a problem with the blades make a visual inspection of the off/on/reverse switch.

You just need to turn blade with some tool which has a good grip ..I just did it with "Pincers"and now its working..Hope this help.

Jeff:

First make sure that you are loosening the blade bolt (Are you turning it in the right direction?) Turn the mower on it's side and lodge a piece of wood between the blade and the body of the machine and really crank on that wrench. The blade bolt is probably rusted in the crankshaft.

Sounds like a broken shear pin in the drive pulley. Check the belts and see if they are slipping. Broken shear pin will not let the blades spin under pressure. .

your bearings out on spindle housing above the blade.

then you need to open the gear box and find out why if it has a forward and reverse the the shifting linkage it could be stuck in one gear and adding the other will lock it up as well

If it was the motor gear, the blades wouldnt be turning at all...some ppl are clueless :-/

Did you check under the deck for clogs? If its not clogged, DISCONNECT the spark plug wire, and try to turn the blade by hand... Oh yeah, did I mention DISCONNECT the sparkplug wire FIRST! If the blade won't budge, you might have a seized engine. If the blade does move, the problem is in the starter recoil. Rewind the starter string, and check the spring for damage. Good luck!

Fan motor is probably bad, if it is under 5 years old the parts are under warranty. Do not run the unit for very long without the fan working as it can damage the compressor.

you have something stuck in it more than likely,, use the key ( unplug it first) and turn it backwards,, keep looking inside with a flashlight for the lodged object once you see it,, remove it,, sometimes the key won't work if its something caught in the blades themselves, so use the handle end of a broom or plunger with a wooden handle to push on the blade itself to turn the unit over