I'm no mathmatizer, but my little b2650 will lift a heaping bucket of gravel all day long and not complain about it the next day. Heaping bucket of wet dirt (we have heavy clay here in E TN) is no problem either. Bucket and loader sizes are matched to tractor's power outputs and weights, so it's reasonable to assume if you have the correct fel and bucket for your tractor, it should be able to work a full bucket of normal material without breaking something. Personally, I'd call my dealer and have a discussion if I were you.