replaced both front spindles last season. bought new bearings to replace "bushings" but cannot get a flat washer on, just the E clip, not enough space. pulled a front wheel this week to replace tire and noticed edge of bearing wearing away, replaced it. I'm on my 3rd new front wheel and figure I'll be getting another one this season, if not 2. can't figure out what I'm doing wrong. bought this mower when we bought the house about 6 years ago. I think the 145 is about 10-11 years old. thanks