I think you both are right, from what I remember when at DT, the frames come from Lippert with all the jacks and rams for slides attached and plumbed, and the pump units are added at DT later. We were watching the bare frame on the line being tested and bled from a separate pump and control unit (floor mounted) with all the actuators moving in and out. We had to watch out not to get hit!
Cheers,
Bill
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