Hello, First post.

I am reactivating the AC system in my 93 Cherokee with 4.0L. Previous owner removed the compressor and installed a bypass pulley. I am asking for detailed description, link to a clear service manual or pictures of the compressor of a 91 through 94. Which port should be Up S (suction) or D (discharge)? I am having trouble charging the system. The system was previously converted to 134a. I have pulled a Vacuum but have high pressure on the lower/large hose when trying to recharge. I have opened the King Valves.