I am using the original hoses. I believe that these hoses were tygon?

Lorn,

 

If the lines are original they have a black shiny exterior and are high pressure hoses.  Tygon is used pretty much for low pressure food and chemical (including gas) transfers. See

 

 

High pressure to Tygon is 150 psi.

 

I have to go to the hangar at look at old extra hydraulic tubing to get the brand name.