This advice may help you.

Is it OK to prune my Japanese Maple tree now in the Spring?
I have this tree in my front yard and some of the branches sit so low, I have to duck when I enter my house because thet are so low. Is it O.K. to just cut them off with a saw so I won't have to duck anymore. This tree is getting huge.Plus it's sucking up all the water for my grass. When summertime comes I have almost a naked lawn. What can I do?

Please wait until Summer to prune your Acers. Right now the juices are flowing and trying to encourage new growth. Pruning now will cause excessive bleeding & may severely hamper growth, plus leave it susceptible to disease.