Welcome to TBN, FARMBOY. Go ahead and fill out your profile so we can
know where you are and what you have.
Sounds like your mixer is a 3-pt mixer with a single-acting hydraulic toplink
for dumping, like my Mixer80. There is lots posted on TBN about mixers....go
ahead and try the SEARCH facility.
If that is what you have, the hyd hose needs to be connected to a hyd
aux valve (aka remote valve) on your tractor. Most of those will be for
double-acting cyls, not SA like yours. But they can still be used. I found
the SA cyl on my mixer to work poorly, so I converted to DA. Otherwise,
you have only the weight of the mixer to cause it to dump.