Hi everyone, I’m new to the site and this is my first post so...please excuse the mistakes, I’ve been working on push mowers for about a year now and I’m trying to work on my first rider mower, my problem is the mower doesn’t change speeds, it’s a Mtd model number 13A1762F029 and serial number 1D228B40033 with the variable speed pulley, I’ve removed the pulley and it seems to work fine, the belts look O.K. but the clutch pedal wasn’t engaging the variable speed except in park, I seen a YouTube video on how to make sure the adjustments were right by starting it, depress the brake, put it in 6 gear letting off the brake, depressing it again, then shutting off the mower, when I do that the variable speed pulley should be tight on the top and loose on the bottom.....but mine is tight on the bottom and loose on top. Any help would be greatly appreciated. Thanks