The machine is probably too light to push any serious snow even with chains.
But without chains, it would be worse...
So, get the chains and start pushing the snow before it gets deep. Just remember to push the snow way back on the initial passes to leave room for the later passes.
I don't have chains, but I do have MFWD. Once the snow is about 8" deep, I head out to start plowing. I know I can plow up to 12"...done it. But two passes of lower accumulation works better then one pass of deeper accumulation....works for me, anyway.