On the Famco webpage, I saw arbor presses similar in size and frame to mine, but with ratcheting mechanism, that were rated up to 8 tons. (3
1/2-C). So I thought how to get a little more force from my press, and decided to try a hydraulic jack. I bought the smallest rated jack (4 tons) at Harbor Freight for $12.99.I calculated that with moderate effort, and only half length of the handle, the press produces about 8-10 tons of effort when assisted with the jack.
See pix here.