How much force do you REALLY get?

[mentorDon]

Try getting another air pressure gage and place it with a 'T' connector close to the cylinder to verify your air pressure is close to 60 psi.

[David Fort]

Update:
We checked with another pressure gauge - they agree we are working with 60 PSI.

We have straightened out some pulleys and doubled the piston area. Not happy, but seems to be working.

Thanks for the assistance everyone.