It'd hard to troubleshoot getting info over the phone I have the same problems sometimes. If you could take some pictures and post them of the deck/drive pulley with belt etc so we can see what's going on that would really help.
It's been awhile since I have replaced bearings, however unless the bearings have worn so far it's allowed the spindle to tilt to the side... I'm not sure it is the bearings, you can check by using your hand and spinning the spindles, pushing on them etc
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