Ive got a 94 ranger 3.0 V6 and I am needing to change my A/C hose its completely crack in half like the rubber rotted from this Arizona heat. Has anyone changed this do I need to replace o-rings. I havnt taken it apart yet but notice there is one bolt holding it to the rear of the compressor. How much 134 do you think I need and should I add a oil charge as well??

Any info would be great. Thanks.