I was wondering the same thing with my loader. I am used to by TLB and using the lift and curl at the same time when loading the bucket. I thought it was a bit weak too until I tried just using the lift by itself and it seemed much stronger.
I was looking at the installation manual for the loader and there was not anything about setting the relief valve for the 724 vrs the smaller loader.
My question is, is the relief valve part of the tractor or loader and is it set any different for the smaller loader vrs the 724?