Sounds like you should contact AZpete. He will take your call and give you some advice. Then you can post your results.
I believe there is no procedure to "bleed" the lines after you replace the fluid, because it is supposed to be self-bleeding, but I also think you are supposed to perform this service with the slides-in so the reservoir is full and the lines are equalized.
I suppose it's possible you may need to bleed the line after you replaced one of the lines, but I have no experience doing that. With that said, maybe these suggestions will help you in a pinch?
* I assume your slides were working fine before you replaced the line? Were they?
* I assume your jacks are working now? If so, then maybe can you cycle your jacks a few times to work the air out of the lines after you do this:
A) Loosen the line your replaced at the farthest end from the HWH pump and momentarily pulse the pump on-off... until you see fluid leave the line. Then attach the line to the synchronizing cylinder or wherever.
B) If you are on reasonably level ground... leave your slides out and actuate the jacks a couple times... waiting between cycles so you do not over work the system.
C) Then put your jacks-down and now see if your slides work properly?
D) It may take a couple cycle cycles and remember to hold the button you press to retract the slides for about 3-5 seconds after the side is all the way in so you can equalize the hydraulic pressure in those equalizing cylinders.
Note: Your passenger slide may have a different mechanism than my RV.
So before you perform these items, you first need to make sure you do not have one of those "chain mechanisms" on the left and right side of your passenger slide, because if you do then maybe on side may need to be repaired.
==> Now you should get some help from others who find your call for help! ...Because if I said anything wrong, we will hear about is soon enough.
==> To you naysayers out there, remember: My first recommendation is to wait until you talk to AZpete. ...But if this crazy idea works or not, please let the rest of us know, because one day we may be in your shoes!
==> BTY, if you can tell us what type of HWH system you have and if you can post some pictures would also be nice to see!
Note: If you slides and jacks were operating very slow before your replaced your leaking hydraulic line, then chances are you had/have multiple problems going on, and maybe your Shuttle Value is blocked up with some crud.
Here's a like with videos on how to replace your shuttle valve and it's a good reference to keep for other ideas on how to test/by-pass your shuttle valve to see if your slides work properly or not with the shuttle valve out of the loop:
* I particularly like how the video RV owner used a 10-micron gas filter to clean the crud out of his HWH fluid and then he reused it. ...Me personally, I would replace it with new, cheap grade Dexron III that does NOT have any high mileage additives in it. Or you might consider saving 50% of your old stuff (filtered) and then replace the other 50% with new Dexron III if you don't have enough fluid or just want to save some money.
* And while you are a fluid changing mood, when was the last time you changed your hydraulic steering pump reservoir (if you have one); and when was the last time you changed your Allison 3000MH filters and fluid with Dexron TES295 grade fluid?