Cargo bike on Caltrain

I have a large front loading cargo bike that I am trying to determine if I can get on the train.

Even with the lower steps up on the new trains, it's still to heavy to pick up as I would a regular bike.

My question is, would there be an issue with my using a ramp like this to make it easier to wheel the bike up the stairs and onto the train? (I know they have ramps for disabled access but a conductor told me these are not in the bicycle cars - they are only for disabled passenger loading.)

Is there any limit on the size of bikes allowed on Caltrain?

Thank you!